NZ733756B2 - Monitoring and control of soil conditions - Google Patents

Abstract

Disclosed is a method for achieve certain soil condition. The method comprises obtaining an aqueous sample extracted from a suction probe (106) positioned within a soil substrate (103) including a root activity zone (112) of a plant species (109) in the soil substrate (103); and analyzing the aqueous sample to determine a chemical composition of the soil substrate (103) aqueous sample. The chemical composition comprises concentrations of one or more marker ions. The method further includes determining nutrient utilization by the plant species based at least in part upon the concentrations of said marker ions; and determining a corrective action to adjust the chemical composition of the soil substrate (103) based at least in part upon the determined nutrient utilization of the plant species. s sample to determine a chemical composition of the soil substrate (103) aqueous sample. The chemical composition comprises concentrations of one or more marker ions. The method further includes determining nutrient utilization by the plant species based at least in part upon the concentrations of said marker ions; and determining a corrective action to adjust the chemical composition of the soil substrate (103) based at least in part upon the determined nutrient utilization of the plant species.

Description

MONITORING AND CONTROL OF SOIL CONDITIONS CROSS REFERENCE TO RELATED APPLICATIONS This ation claims priority to copending US. provisional application entitled “MONITORING AND CONTROL OF SOIL CONDITIONS” having serial no. 61/603,680, filed February 27, 2012, which is hereby incorporated by reference in its BACKGROUND As population continues to increase, food production becomes an ever ing problem. Effective use of water resources affects the productivity of agricultural farms. In addition, ization has become one of the main factors enhancing productivity and quality of agricultural farms. This has resulted in increased consumption of fertilizers ide, raising new issues such as increased tion costs and ination effects from agricultural activity.

BRIEF DESCRIPTION OF THE DRAWINGS Many aspects of the invention can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, is instead being placed upon clearly illustrating the principles of the present ion. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. is a graphical representation illustrating the monitoring of the condition of the soil using a plurality of suction probes according to various embodiments of the present disclosure. is a graphical representation of an example a n probe of according to various embodiments of the t disclosure. is a flow chart illustrating an example of monitoring and control of the soil condition according to various embodiments of the present disclosure. is a flow chart illustrating an example of sample analysis ing to various embodiments of the present disclosure. is a table illustrating the relationship between various additives and their effect in a plant according to various embodiments of the present disclosure. is a flow chart illustrating an example of the composition and/or utilization evaluation of according to various embodiments of the present disclosure. is an example of a system that may be utilized in the monitoring and control of soil ions according to various ments of the present disclosure.

DETAILED DESCRIPTION Disclosed herein are various embodiments related to monitoring and control of soil conditions in, e.g., agricultural applications. Reference will now be made in detail to the ption ofthe embodiments as illustrated in the drawings, wherein like nce numbers indicate like parts throughout the several views.

Controlled application of water and fertilizers can enhance the productivity of agricultural farms in a sustainable fashion, providing greater ability, food safety, and environmental preservation. Monitoring the ional conditions of the crops may be used to control the application of available resources (e.g., water and fertilizer) to fulfill the plants ional needs throughout their evolution; thereby improving tivity and quality of the resulting produce while reducing inputs and loss through Iixiviation. is of the chemical composition of the soil and/or liquids about the roots of the , as well as diagnosis of the plant condition, can provide an indication of nt absorption by the plants which may be used to control watering and/or fertilization. Monitoring of the soil condition may be accomplished using suction probes installed at different depth levels of the root profiles ofthe crops. By ting aqueous solutions from the soil substrate about the roots, the interaction ofthe root activity and soil conditions may be monitored and used to control the application of nts to the soil substrate. For example, the reaction and behavior ofthe inputs (e.g., water, effluents, fertilizers, coadyuvants, chelates, etc.) added to the soil and the reaction of the soil to these inputs, as well as root activity for nutrient absorption, may be evaluated throughout the phenological cycle of the plants to provide indications that may be used for controlling the application of additives such as, e.g., chemical nutrients in a cyclic or continuous manner.

Referring to shown is a cal representation illustrating the monitoring of the ion of the soil 103 using one or more suction probes 106 ing to various embodiments of the present disclosure. For example, plants 109 of the same species are planted in the soil substrate 103 with their roots extending through a root activity zone 112. Water and/or fertilizer solutions 115 may be provided to the plants 109 through drip lines, sprinklers, or other delivery system.

In the example of suction probes 106 are located at a plurality of depths (or levels) within the root activity zone 112 of the s) 109. For example, suction probes 106 may be placed at two depths (e.g., about 15 cm and about 30 cm) for vegetable crops or three depths (e.g., about 20 cm, about 40 cm, and about 60 cm) for woody plants. Suction probes 106 may also be located at other depths as can be understood. The depth(s) may vary based upon the plant species. In addition, probes may be installed at a depth below the root ty zone 112 to monitor for propagation of unused nutrients through the root activity zone 112. Additional suction probes 106 at the same or different depths may also be utilized. For instance, suction probes 106 may be distributed, either individually or in groups, at different ons within a row, bed, and/or field to monitor for ions within the field.

In other implementations, one or more suction probes 106 may be placed at one or more depths in the soil substrate 103 for environmental monitoring such as, e.g., where lixiviation is monitored. For example, in the metal or mining industries where washes and flushing are often used, monitoring for metal or other contamination in the soil substrate 103 may be ented using suction probes 106. Possible applications may include, but are not limited to, static leaching, site monitoring for decontamination, medium and long term monitoring of restoration and/or rehabilitation of affected , leakage and/or spoilage monitoring, etc. using one or more suction probes to obtains samples from a soil substrate. Aqueous samples may be analyzed for chemical composition to monitor for variations in the soil substrate 103. al or tive actions may be taken based upon the monitored sample composition. Analysis of the samples may be used to provide warnings and/or alarms and/or to propose corrective measures to eliminate or reduce the environmental effects. illustrates an example a suction probe 106 of The n probe 106 of es a porous capsule 203 of, e.g., porcelain attached to one end of a tube 206 of inert material such as, e.g., hard rubber, polyethylene, or PVC.

For example, the porous e 203 may be about 50mm in er and extend from the end of the tube by about 85mm. The porous porcelain may have a thickness of about 5mm with a porosity of about 25-23% and an average porous diameter of about 8-10A. Other chemically inert als may also be used for the porous capsule 203 such as, e.g., porous ceramic. The porous characteristics of the material used in the porous capsule 203 allow for hydraulic conductivity of aqueous solutions from the soil when a vacuum is drawn inside the suction probe 106. The porosity of the porous capsule 203 should allow the monitored chemical composition to enter the suction probe 106 without difficulty. In addition, other shapes and dimensions may also be used for the porous capsule 203 and/or suction probe 106.

A cap 209 (e.g., rubber or PVC) seals the te end of the tube 206. A fitting 212 attached to the cap 209 allows for connection to a vacuum pump to draw a vacuum within the hollow suction probe 106. The fitting 212 may include a valve to allow the vacuum pump to be disconnected while maintaining the vacuum within the suction probe 106.

Referring back to the suction probes 106 are installed in a vertical position within the soil 103 at a plurality of depths within the root activity zone 112.

For example, a hole may be drilled into the soil 103 and the suction probe 106 may be ed to the appropriate depth. In general, a group of suction probes 106 are installed in an area of good root activity under the same plant or under neighboring plants that are in the same phenological stage. For example, a group of suction probes may be installed along a crop row of plants that were planted together. The location of the n probes 106 may also take into t the position of the irrigation system. For instance, a suction probe 106 may be located in the center of a wet area under a drip line. Also, suction probes 106 should be adequately spaced apart (e.g., about 20-30 cm) to allow room for adequate sampling of aqueous solutions from the surrounding soil without ing with an adjacent suction probe 106.

In some implementations, the porous capsules 203 ( of the suction probes 106 may be submerged in water (e.g., for about 15-20 s) to allow for hydration of the porous capsules 203. Hydration of the porous capsules 203 can improve the hydraulic connection between the soil 103 and the porous capsules 203.

Hydration may also facilitate insertion of the suction probe 106 into the soil 103. The surrounding soil 103 may also be packed around the n probe 106 (e. 9., using a wire) to ensure a good hydraulic connection between the porous capsule 203 and the soil 103. Samples of the soil 103 at various depths (e.g., 0—30 cm and 30-60 cm) may be obtained during installation ofthe suction probes 106. A soil sample may be obtained for each of the probe depths. A soil sampling protocol may be followed to ensure that the samples represent a true indication of the soil composition. is of the soil samples can e base line information about the composition of the soil substrate 103.

After installation of the suction probes 106, aqueous solutions may be extracted from the substrate nding the roots of the plant(s) by drawing a vacuum in the suction probes 106. A vacuum pump (not shown) may be connected to the fitting 212 ( to draw a vacuum within a hollow suction probe 106. For example, the vacuum may be in the range of about 0.5 atmosphere (atm) to about 1.0 atm, in the range of about 0.6 atm to about 0.9 atm, in the range of about 0.7 atm to about 0.8 atm, or about 0.8 atm. A meter may be used to te the vacuum within the suction probe 106. Once the vacuum has been drawn within the suction probe 106, a valve included in fitting 212 may be closed to maintain the vacuum in the suction probe 106. In some cases, the size of the suction probe 106 may allow a vacuum to be drawn with a manual pump.

The vacuum within a suction probe 106 hydraulically conducts an aqueous solution from the nding soil 103 into the suction probe 106 through the porous capsule 203 (. The volume of the collected solution will depend on the hydraulic conductivity of the soil substrate 103 and the water content of the soil 103, as well as the extraction time during which the vacuum is maintained in the suction probe 106. For example, the extraction period may be about 2 days to about 4 days.

Vacuum ions and air tightness depends upon porous characteristics of the al of the porous capsule 203 and the connection with the surrounding soil 103.

In some implementations, the vacuum may be maintained within a range of values over the extraction period.

At the end of the extraction period (9.9., after about 48 hours), an aqueous sample is collected from the suction probe 106. An aqueous sampling ol may be followed to ensure that the s represent a true indication of the chemical composition of the aqueous sample. For example, the aqueous sample may be obtained through a micro tube that passes through the open fitting 212 ( to the porous capsule at the end of the suction probe 106. A e (or other extraction device) may be used to extract the aqueous sample from the suction probe 106 through the micro tube. Aqueous samples of 30ml or more may be obtained and ed for analysis. In some implementations, a 125ml aqueous sample is obtained. In some embodiments, a separate sampling tube is provided for obtaining aqueous s through the cap 209 ( of the suction probe 106.

The sampling tube may pass through a separate hermetically sealed g in the cap 209. A valve in the sampling tube may be used to close off the sampling tube WO 28232 during the extraction period. The valve may then be opened to allow the aqueous sample to be obtained from the suction probe 106. The aqueous samples from the suction probe 106 may then be provided for chemical is and further evaluation.

In addition to the aqueous samples from the suction probe 106, samples of a fertilizer solution (FS) 115 ( that is ed to the plants 109 may be ed during irrigation of the plants 109 (. The F8 115 includes irrigation water that may be mixed with additives such as, e.g., fresh or ed water, residue water, fertilizers, minerals, chemicals and/or other nutrients. A ng protocol may be followed to ensure that the samples represent a true indication of the FS composition. For example, one or more collection device(s) located in the vicinity of the suction probes 106 collect FS 115 during plant irrigation. A plurality of collection devices may be distributed at different locations within a row, bed, and/or field to r for variations in distribution of the FS 115 within the field. In the case of drip tion, a collection device such as, e.g., an appropriately sized liquid container may receive FS 115 from the drip line through an adapter near the group of suction probes 106 (. Thus, when the plants 109 are being irrigated, the collection device ts a sample of the FS 115 being applied. In the case of sprinkler irrigation, a collection device such as, e.g., an open container may be positioned in the vicinity of the group of suction probes 106 to collect an F8 sample from the discharge of the sprinkler. These examples provide a sample of the FS 115 that is representative of that provided over the entire irrigation time period.

The F8 samples may then be provided for analysis. Analysis of the FS 115 provides information regarding the fertilizer contributions and the ions of assimilation (e.g., pH, electrical conductivity, and ionic relationship). When considered with the aqueous on analysis and the soil sample analysis, it is possible to evaluate the interaction of the FS 115 with the plant 109 and soil 103 (. For example, plant absorption and/or utilization of nutrients as well as soil interactions such as precipitation, solubility, ion desorption, etc. may be evaluated.

Samples of irrigation water and tissue of the plants 109 may also be obtained and provided for analysis. Sampling protocols may be ed to ensure that the s represent a true indication of the irrigation water composition.

Irrigation water samples may be obtained at the , before filtering, after filtering, and/or before addition of one or more additives such as, e.g., nutrients and/or chemicals to form the FS 115. Composition of the irrigation water may be used as, e.g., a baseline in ining ments to the additive(s) for the FS 115. For example, l salt t may be adjusted based on the analysis of the irrigation water to meet the nutritional needs of the plants 109. Sampling ols may also be followed to ensure that the samples represent a true indication of the plant tissue composition. Plant tissue samples may be leaves that are neither old nor too young such as, e.g., the first 5-6 leaves after the apex of a shoot of the plant 109. Other tissue samples include sap, stems, roots, flowers fruit, seeds, etc. that may be obtained during the growth of the plant 109. Sampling protocols may be different for various plant materials such as, e.g., leaf cultivation, sap, fruit, and flowers.

Sampling protocols will depend upon the species of the plant 109. Analysis of the tissue samples can provide information of the nutritional status of the plant 109 indicating absorption and/or utilization of the additives ed in the FS 115.

Analysis may take into account evolutionary interpretations considering seasonal changes of the type of plant materials and variety level and static interpretations without consideration of seasonal changes.

The analysis of the soil samples, aqueous samples, irrigation water samples, and/or plant tissue samples provides information that may be used in the evaluation of the availability, balances, intakes, and rate of use of the nutrients over the growth cycle ofthe plant 109. For example, analysis of the soil sample at each depth can provide information about the availability of leaching nutrients, allowing evaluation of the ion dynamics within the soil 103 (. In addition, it allows for tion of the rate of Iixiviation of the fertilizers in the root activity zone 112 ( and/or the behavior of different additives when added to the soil 103. The information may be used, at least in part, to ine adjustments and/or changes to the FS 115 ( that is d to the soil 103 with the root activity zone 112.

The ition and analysis of aqueous samples may also be used for static ng processes. For example, the process may be applied in "Heap" and "Dump" ng for, 6.9., copper Iixiviation, oxidized and primary minerals as porphidic or massive sulphides, with the participation of microorganisms in the sis of chemical reactions. In addition, monitoring and control of the soil ion may be d to uranium leaching, gold leaching from oxidized materials or in free form, and/or bio-leaching of gold in sulphides minerals.

In general, static leaching ses are based on bed packed percolation techniques, which are prepared for that purpose and may be distinguished as two main groups: "heap leaching" and "dumping leaching." The difference between the two groups is based on the volume, control of the process, and the concentrations of the substances to be extracted in the solid matter. "Heap leaching" requires less time to Iixiviate, lower volumes of materials, greater legal requirements, and greater operational control. In both cases, the process is based on g accurate and reliable information about what happens inside the piles during the heap and dump WO 28232 leaching. Three chemical phases ct in the chemical processes: solid material, the leaching agent, and gas that is dissolved in the liquid or introduced in a forced manner. Moreover, in many cases leaching procedures count on the participation of microorganisms. These proceedings add additional information to the historical analysis of percolation, which allows operational measures to be taken to correct and improve the functioning of the process.

Initially, a number of suction probes 106 are installed within the pile as described above. The number of probes 106 may be based upon the volume and e being ed. The suction probes 106 may be situated at various depths to obtain the widest range of information possible. For heap leaching, probe placement can be carried out during construction. Dump leaching may also have one or more suction probe(s) 106 installed during construction but, due to the longevity and long term exploitation, suction probes 106 may be installed after the dump has been built. This may be accomplished by forming (e.g., drilling) a small perforation to introduce a n probe 106. After installation, aqueous samples may be obtained using the suction probes 106 as described above. The sampling le (and durations) may be based upon the red process. The collected aqueous samples may be analyzed to determine data such as, e.g., temperature, oxygen and other dissolved gases, pH, electro conductivity, metal concentrations, other dissolved cations and anions, concentration and/or types of microorganisms, and/or c substances produced as a result of bacterial digestions. Based on the analysis data, recommendations may be offered in terms of, e.g., volumes of flow, concentration of lixiviating , and/or air or gas flow to be injected.

The "in situ" on site monitoring may also be applied in solid-liquid extraction processes used in the cleaning and decontamination of contaminated lands. Applications can e metal inated soil close to urban areas or other large facilities which make tion and transport of the contaminated soil too complicated. Examples include, but are not d to, metallurgic facilities (smelting, steel industry, transformers, etc), zones with high concentrations of minerals and metals, and/or stations or facilities where materials are transferred, loaded or unloaded. In cases where the ent is made in soil that has not been moved to an external waste management platform, suction probes 106 may be used to permit operational performance follow-ups. The suction probes 106 allow for a simple implementation that can be used for environmentally friendly monitoring. Suction probes 106 may be placed and aqueous samples obtained as described above. The information gained from the analysis of the aqueous samples may be used to prove the efficiency of the d processes and to ine any further ments or corrections to conclude the decontamination task.

Following amination of soil or other degraded spaces, medium or long term monitoring may be established using led suction probes 106. Suction probes can be placed for effective monitoring. In general, for homogenous grounds suction probes 106 are placed a various depths for sampling throughout the soil substrate. In non-homogenous grounds, probes 106 may be positioned to account for the soil variations. Aqueous samples can be obtained from the probes 106 to monitor and identify possible metabolites from substances that are not recovered completely. Samples may be analyzed to determine the behavior of substances within the soil and how they degrade and/or mobilize under different climatic conditions. Once the behavior is known, scheduling of measurements can be optimized and the number of and time between each sampling may be spaced out.

When fully optimized, it may be that suction probes 106 will not provide liquid phase samples, which may indicate good functioning of the monitored system and a lack of a liquid phase in the ty zone. Whenever the situation changes, a gathered sample may be analyzed and the parameters associated with the origin of the contamination. Corrective actions may be proposed based at least in part upon the analysis results, followed by additional monitoring and testing.

Suction probes 106 may also be led and used to provide alerts and/or prevent leaks and spoilages in processes where barriers are used to protect nding environments. In situations where there is a risk of spoilage or possible transfer of products or residues to the ground, early detection of seepage into the surrounding soil can allow for a rapid response.

For example, monitoring may be applied in industrial ties with risk of leakage or losses such as, " and/or "dump" leaching of different metals 9.9., "heap (e.g., copper, uranium, gold, nickel, or others), dumping sites for hazardous wastes, urban garbage dumps or sites, and/or chemical rial areas with pools or ponds.

The use of artificial protection barriers and/or highly impermeable layers in combination with monitoring with suction probes 106 reduces the chance of economic loss or negative environmental impact. The configuration and extent of the barrier used can be taken into eration to determine the placement of n probes 106. The suction probes 106 may be vertically situated outside the barrier at one or more depths and/or one or more angles of inclination. A sampling schedule may be defined ing the frequency and analysis of aqueous s obtained from the suction probes 106. Immediate notification may be provided to an operator upon detection of an s sample. A ol may define the type of reporting when there is an aqueous sample as well as when no aqueous solution is present for sampling. Analysis of the aqueous sample can be used to determine if the leak is a similar composition to the substances used by the facility. In some cases, tive measures may be recommended based at least in part upon the analysis results.

Referring to shown is a flow chart illustrating an example of monitoring and control of the soil condition according to various embodiments of the present sure. Beginning with block 303, one or more suction probes 106 ( may be installed at one or more depths in the soil substrate 103 (. The soil substrate 103 may include a root activity zone 112 ( of a plant species in the soil substrate 103. One or more of the suction probe(s) 106 may be within the root activity zone 112. The suction probes 106 include porous capsules 203 ( that allow for hydraulic conduction of s solutions from the soil ate 103 and/or root ty zone 112 when a vacuum is drawn. Holes may be drilled into the soil substrate 103 and one or more suction probe(s) 106 ed at one or more depths. Samples of the soil substrate 103 may also be ed at a variety of depths at this time and analyzed to determine the composition of the soil substrate 103. In block 306, a fertilizer solution 115 ( may be supplied to the plants 109 ( by irrigating with, 9.9., a drip line or a sprinkler. A sample of the F8115 may also be collected over a portion of the entire irrigation period in block 306.

Samples are obtained in block 309. For instance, a sample (or samples) of aqueous solution(s) may be obtained from the n probe(s) 106 (. A vacuum is drawn on each suction probe 106 to induce hydraulic conduction of aqueous solutions from the soil substrate 103 and/or root activity zone 112 (.

After a ined time period (9.9., 48 hours), one or more sample(s) of the aqueous solution is extracted from the suction probe(s) 106 and provided for analysis in block 312. The aqueous samples may be analyzed for pH; electrical conductivity; anions such as, e.g., N03] H2PO4', HCOa', COJ, 804:, and/or Cl‘; cations such as, e.g., Ca”, Mg”, K+, Na+, and/or NH4+; and microelements such as, e.g., B, Fe, Mn, Cu, Zn, Mo, and/or Urea. A sample of the FS 115 collected over the irrigation period may also be obtained from a tion device in block 309 and the composition analyzed in block 312. Plant tissue samples and/or an irrigation water sample may also be obtained in block 309 and analyzed in block 312. The F8 sample, as well as an irrigation water sample, may be analyzed for the same elements as the aqueous solutions. The tissue sample may be ed for, e.g., nitrogen, phosphorous, sulfur, ne, calcium, magnesium, sodium, potassium, boron, iron, manganese, copper, zinc, and/or molybdenum.

In block 315, the chemical composition and/or the nutrient utilization evaluated based at least in part upon the sample analysis of block 312. Chemical, mineral, and/or nutrient levels in the root activity zone 112 ( may be ed and compared to predefined levels associated with the plant species. In some implementations, the levels used for comparison may vary with the phenological stage of the plant 109. Concentrations of marker ions (which are present in the root activity zone 112 but are generally not absorbed by the plant 109) such as, e. g., chlorides and/or sodium at the ent depths may also be examined and used to evaluate, e.g., crop absorption of water and evaporation effect. In addition, ion concentrations with respect to one or more marker ions may be used to evaluate the utilization of various nts. For example, chlorides may be used to determine utilization of en and/or other anions such as, e.g., NOg', H2PO4', and 804:, sodium may be used to determine utilization of potassium, calcium, magnesium and/or other s such as, e.g., NH4+, and the combination of chlorides and sodium (e.g., the average of both) may be used to determine utilization of phosphorous or other chemicals and/or nutrients. Based at least in part upon the utilization, consumption of the ions, chemicals, and/or nutrients may also be ined. Effects of the soil composition may also be taken into account during the evaluations. Also, plant tissue analysis may also be used to evaluate the absorption and/or utilization of nutrients by the plants. The evaluation may also take into account variations in the analyzed sample ed over the growth ofthe plants as well as those obtained at different locations within the field. In some cases, is information may be ed with broader agricultural segment information during the evaluation.

Corrective (or al) measures are provided in block 318 based at least in part upon the evaluation of block 315. For example, corrective measures may include increasing the water dosage to dilute the ions in the root activity zone 112 and/or the soil substrate 103. In some entations, corrective measures may include irrigation of the plants 109 using irrigation water without the addition of other additives such as, e.g., fertilizers or chemicals. In other cases, the amount of additive(s) to be included in the FS 115 or adjustments to proportions n the chemical components in the FS 115 may be provided. In some implementations, the tive measures may be automatically d to the next application of FS 115.

In some implementations, other factors may also be considered when determining tive measures. For example, weather conditions (e.g., temperature, rainfall, wind, etc.) and applied fertilization strategies (e.g., UF, fractionation, anticipate DFR, etc.) may be accounted for.

The flow chart repeats the monitoring and control of the soil condition by returning to block 306 where another FS 115, which is based upon the adjustments provided in block 318, is again supplied to the plants 109. In this way, the condition ofthe soil may be monitored and controlled in a cyclic or continuous manner to improve crop growth and production. illustrates es of the composition tion that may be carried out on various obtained samples in block 315 (. For example, analysis of a sample of the irrigation water 403 may provide information 406 including, e.g., pH level, electrical tivity (CE), mineral contributions, bicarbonates, salty ions, etc. In on, analysis of the FS 115 may provide information 409 about the irrigation water 406 may include, e.g., pH level, electrical conductivity (CE), the contribution of additives such as, e.g., chemicals and/or nutrients on the irrigation solution, etc. Soil solutions 412 (e.g., aqueous solutions and/or soil samples) may also be analyzed to determine soil composition information 415 such as, e.g., chemical and/or nutrient absorption, ng, pH level, electrical conductivity (CE), salinity levels, etc. Samples of the plant 109 may also be obtained for foliar analysis 418 which may be used to diagnose the ional status 421 of the plant 109.

Each condition of the obtained samples may be analyzed and evaluated individually or in conjunction with conditions of the same or other samples in block 315 ( to determine the corrective measures of block 318 (. For example, pH level may be evaluated hout the root activity zone 112 of the plants 109 to quantify the acidity of the soil substrate 103 ( and determine tive solutions if . In general, pH levels are maintained in a range of about 6—8, about 6.5—8, or about 6.5-7.5 by adjusting the composition of the supplied FS 115 (. Lower pH levels can pose a risk by increasing the solubility of metals such as, e.g., Al, Mn, Fe, Cu, and Zn. A pH < 5 could produce Aland Mn concentrations that may be toxic. Higher pH levels reduce the solubility of metals, but may need to use chelating agents for Mn, Fe, and Zn. For example, EDTA may be used for a pH < 6.7, DTPA may be used for a pH between 6.7 and 7.8, and EDDHA may be used for a pH > 7.8. ions based upon the analysis of the soil samples may also be considered when evaluating the effect of the FS 115 on pH levels.

The salinity condition throughout the root activity zone 112 may also be evaluated based upon, e.g., electrical conductivity (EC) and chloride and sodium content within the aqueous samples to provide an indication of salts and/or fertilizer accumulation and salt leaching in the root activity zone 112. Criteria to evaluate the EC throughout the root activity zone 112 will depend on the plant species. An example of l criteria that may be used to evaluate the chloride and Na concentration ratios is provided in TABLE 1 below. The chloride concentration ratio (CRci) is the ratio of the e Cl level in the aqueous samples from throughout the root activity zone 112 to the CI level in the supplied FS 115 and the sodium concentration ratio (CRNa) is the ratio of the average Na level in the s samples from throughout the root activity zone 112 to the Na level in the supplied FS 115.

CI concentration ratio Medium 1.5—2 1.2-1.5 Na concentration ratio Medium 1.5-2 1.2-1.5 TABLE 1.

The concentration ratio may also be applied to other ions, chemicals, and/or nutrients within the root activity zone 112 and the FS 115. For example, the concentration ratio for an ion, chemical, or nutrient X in an aqueous sample may be expressed as: CRx = XAs/XFs where XAS is the e level of the ion, chemical, or nutrient X in the aqueous samples from the various depths of the root activity zone 112 and XFS is the level of the ion, chemical, or nutrient X in the supplied FS 115.

The EC concentration ratio (CREC) may also be used to evaluate salinity conditions within the root ty zone 112. The CREC is the ratio of the average EC level in the aqueous s from throughout the root activity zone 112 to the EC of the supplied FS 115. When the CREC is about 1-1.2, this can te that the soil 103 is very ble. In this case, CRCI and CRNa being about 1—1.2 can indicate low plant activity and/or high drainage. When CRCI and CRNa are > 1.5, this can indicate high plant activity and/or limited drainage. If the EC decreases progressively with depth, this may indicate a strong response from the plant root system (absorption) that is reducing salts from the root activity zone 112. In the case where the CREC indicates low permeability (>15), salts are entering the root ty zone 112 faster than they are removed by the plant roots or drained from the root ty zone 112. High root absorption may be indicted by high rates of fertilizer use while low plant activity may be indicated by low rates of fertilizer use.

Crop development and productivity can be limited by the high saline levels indicated by high EC. lf high levels of Cl" and Na+ are t, there is a risk of phytotoxicity, antagonism, osmotic stress, and soil peptization. Washing irrigations and maintaining the soil moisture at field capacity can reduce the concentrations, however Cl'/N03‘ and Na+/(K++Ca+++Mg++) ratios should to be accounted for by maintaining the ratios at 1 um). If high levels of 8042‘, Ca”, and Mg++ are present, then the irrigation is lly osmotic and washing irrigations and maintaining the soil moisture at field capacity is needed. High Ca++ and Mg++ levels can antagonize K+ absorption and H2P04‘ precipitation, so an increase in these nutrient supplies is desirable. Where a mix of both conditions is present, a mix of corrective measures may be used. Acceptable ty levels and/or limits can vary based upon the plant species and corrective measures may be determined accordingly.

Macronutrients such as, e.g., phosphorous, en, potassium, calcium, and magnesium may also be analyzed and evaluated for availability and to identify nutrient imbalances and risks of fertilizer leaching. Concentration ratios (CR) may be determined based upon one or more ion levels in the s samples and FS 115.

A utilization rate (UR) of the nutrients with respect to a marker ion may also be determined based at least in part upon the corresponding CRs. For an ion, al, or nutrient X, the utilization rate may be expressed as: URX = (1 — (XAs/(XFS x CRMKR») x 100 where XAS is the average level of the ion, chemical, or nutrient X in the aqueous samples from the various depths of the root activity zone 112, XFS is the level of the ion, chemical, or nutrient X in the ed FS 115, and CRMKR is the concentration ratio of the marker ion(s) such as, e.g., chlorides and/or sodium. A consumption index (CI) of the nutrients may also be determined based at least in part upon the ponding URs. For an ion, chemical, or nutrient X, the consumption index may be expressed as: CIX = (URX / 100) x XFs.

WO 28232 The URX and CIX of the ion, chemical, or nutrient X may be used as key indicators in the evaluation. For example, the URx and CIX may be compared with predefined levels or ranges to determine if corrections may be recommended.

For phosphorous, the condition of H2PO4' may be examined. in the s samples from the root activity zone 112, HZPO4‘ < 10 ppm can indicate low availability, H2PO4‘ in the range of 10-20 ppm can indicate medium availability, and HgPO4‘ > 20 ppm can indicate high availability. In the FS 115, H2P04‘ < 20 ppm can provide a low contribution, H2PO4‘ in the range of 20-40 ppm can provide a medium contribution, and H2PO4‘ > 40 ppm can provide a high contribution. The H2P04‘ level in the FS 115 should not be higher than 10% of the NO; level. The ation rate and consumption index for phosphorous may be determined based upon the levels of H2P04'. Broadcast fertilization may be periodically applied with H2PO4‘ < 6 ppm.

For en, the ion of N03”, NH4+ and Urea may be analyzed and evaluated. In the aqueous samples from the root activity zone 112, N03‘ < 2 meq/l can indicate low availability, NO; in the range of 2-4 meq/l can indicate medium availability, and N03_ > 4 meq/l can indicate high availability. A high N03‘ level at the bottom of the root activity zone 112 may te a risk of leaching. The nitrogen ation rate (URN) may also be considered where: URN = (1 — (NAs/(NFs X CRCl)» X 100 where NAS is the average level of N within the root activity zone 112, which may be estimated as the average of N03“ + NH4+ + Urea in the aqueous samples at each depth, NFS is the level of N in the FS 115 estimated by the average of N03_ + NH4+ + Urea, and CR0 is the concentration ratio of the chloride marker ion. A URN < 33% can indicate a low use (9.9., excessive contribution or low activity during the period), URN in the range of 33-66% ppm can indicate a medium use (e.g., adequate contribution), and URN > 66% can indicate a high contribution (e.g., a high activity period or insufficient contribution). The nitrogen ption index may also be determined where: CIN = (URN / 100) x NFs.

The CIN may also be evaluated based upon predefined levels or ranges.

An example of general criteria that may be used to evaluate the nitrogen and chloride ratio is provided in TABLE 2 below. tions of NH4+ concentrations > 0.3 meq/l may be an indication of an incipient reducing environment that can lead to root ation problems. Reducing environments may be corrected by, e.g., reduction of FS doses, pulse irrigation, or application of strong oxidizing chemicals such as, e.g., potassium permanganate and/or others.

NICI‘ ratio Adequate Fertilizer Aqueous Solution TABLE 2.

For potassium, the condition of K+ may be ed and evaluated. In the aqueous samples from the root activity zone 112, a level of K+ < 0.3 meq/l can indicate low bility, K+ in the range of 0.3-0.6 meq/l can indicate medium availability, and K+ > 0.6 meq/l can indicate high availability. In the FS 115, K+ < 0.75 meq/l can provide a low contribution, K+ in the range of 0.75-1.5 meq/l can provide a medium contribution, and K+ > 1.5 meq/l can provide a high contribution.

The ium utilization rate (URK) may also be considered where: URK = (1 — (KAs/(KFs X CRCI)» X 100 where KAs is the average level of K+ in the aqueous samples at each depth in the root activity zone 112, Kps is the level of K+ in the FS 115, and CR0. is the concentration ratio of the chloride marker ion. A URK < 33% can indicate a low use (e.g., excessive contribution or low activity during the period), URK in the range of 33—66% ppm can indicate a medium use (e.g., adequate contribution), and URK > 66% can indicate a high contribution (e.g., high activity period or insufficient contribution). The potassium consumption index may also be determined where: CIK = (URK/ 100) x Kps.

The CIK may also be ted based upon predefined levels or ranges.

In addition, the ratio of K+ with respect to other cations (or anions), which may affect utilization of K+ by the plant 109, may be examined. For example, the ratio of K“/(Na+ + Ca++ + Mg”) may also be evaluated. An example of l criteria that may be used to evaluate the level of Na+ + Ca++ + Mg++ and the K+ ratio is provided in TABLE 3 below.

Na+ + Ca++ K* I (Na+ + Ca“ + Mg”) level + Mg++ level Low Adequate Fertilizer Solution Aqueous Solution TABLE 3.

For calcium, the condition of Ca++ may be analyzed and evaluated. In the s s from the root ty zone 112, Ca++ < 3 meq/l can indicate low availability, Ca++ in the range of 3-4 meq/l can te medium availability, and Ca” > 4 meq/I can indicate high availability. The calcium utilization rate: URCa = (1 — (CaAs/(Caps x CRNa))) x 100 and/or calcium consumption index: CICa = (URCa / 100) X can. may also be considered, where CaAs is the average level of Ca++ in the aqueous samples at each depth in the root activity zone 112, (3an is the level of Ca++ in the FS 115, and CRNa is the tration ratio of the sodium marker ion. The URCa and/or CICa may be evaluated based upon predefined levels or ranges.

In addition, the ratio of Ca++ with respect to other cations (or anions), which may affect utilization of Ca++ by the plant 109, may be examined. For e, the ratios of a+ and CaH/Mg++ may also be ted. Examples of general criteria that may be used to evaluate the ratios are provided in TABLES 4 and 5 below.

Na+ level CaH/ Na+ ratio Adequate Fertilizer Solution Aqueous Solution TABLE 4.

For magnesium, the condition of Mg++ may be analyzed and evaluated. in the aqueous samples from the root activity zone 112, Mg“ < 1.5 meq/l can indicate low bility, Mg++ in the range of 1.5-2 meq/l can indicate medium availability, and Mg‘L+ > 2 meq/l can indicate high availability. The magnesium utilization rate: URMg = (1 — (MgAs/(Mng x CRNa))) x 100 and/or magnesium consumption index: CIMg = (URMg / 100) x Mng. may also be considered, where MgAs is the average level of Mg++ in the aqueous samples at each depth in the root activity zone 112, Mng is the level of MgJ’+ in the FS 115, and CRNEl is the concentration ratio of the sodium marker ion. The URMg and/or CIMg may be evaluated based upon predefined levels or ranges.

In addition, the ratio of Mg++ with respect to other cations (or anions), which may affect utilization of Mg++ by the plant 109, may be examined. For example, the ratio of CaH/Mg++ may also be evaluated. An example of general criteria that may be used to evaluate the ratio is provided in TABLE 5 below.

Ca++ level CaHI Mg++ ratio Fertilizer Solution Aqueous Solution TABLE 5.

Microelements (or micronutrients) such as, 9.9., iron, manganese, zinc, copper, boron, etc. may also be analyzed and evaluated for availability and to identify ty risks and nutrient imbalances. An example of l criteria that may be used to evaluate lements in the root activity zone 112 and FS 115 is ed in TABLE 6 below.

Fe Mn Zn Cu B (ppm) (ppm) (ppm) (ppm) (ppm) < 0.5 < 0.25 < 0.15 0.5—2 0.25-1 0.15-0.6 TABLE 6.

The effect(s) of nutrients in the FS 115 on the plant 109 is also considered when determining a corrective measure such as ing nutrient levels in the FS 115 for the next application. illustrates the relationship between added nutrients and their effect in the plant 109. The absorption synergies of the nutrients may also be taken into t when determining the corrective measure of block 318 (. An example of the synergies between the nutrients is provided in TABLE 7 below.

Reduces the Increases the Assimilation of: assimilation of: assimilation of: Mn, P, 8, Cl Ca, Mg, K, M0 Mn (acidic soils) Mn (basic soils) TABLE 7.

Evaluation of the ions for determination of the riate corrective measures may vary based upon plant species. For example, fruits and vegetables may sh under very different nutrient conditions. In addition, the tolerance of the plant 109 to various ion, chemical and/or nutrient concentrations may also affect the proposed corrective measures. Appendix A es examples of evaluation guidelines for peach and nectarine plant species. Appendix A es guidelines for evaluation of irrigation water quality, foliar (plant tissue), FS and aqueous soil s. In addition, Appendix A es allocation of irrigation according to the growth cycle for both young and adult plants and includes diagnosis and observed corrections based upon aqueous sample evaluation. Correction factors are determined based upon various evaluated conditions to determine the irrigation allocation. The amount of one or more additive(s) may be further refined based upon the chemical composition of the aqueous samples and the irrigation water.

Monitoring and control of the soil conditions may be implemented as an application executable by a computing device. For example, evaluation of the ed samples (block 315 of , as well as ination and provision of corrective measures (block 318 of , may be ented with a soil ring and control application. Corrective measures may be determined based at least in part upon evaluation of the analyzed samples using pattern recognition, neural network evaluation, and/or other rule based identification methods as can be appreciated. In addition, supplying a fertilizer solution (FS) (block 306 of , obtaining samples (block 309 of , and/or ing the samples (block 312 of may be automated and controlled by the soil monitoring and l application. The soil monitoring and control application may also allow access to stored analysis data through generated network pages or other cal displays.

Appendix B includes examples of graphical displays that may be rendered for use by a user of the soil monitoring and control application. The graphical displays may allow the user to access the chemical and/or nutritional monitoring of monitored crops by accessing, e.g., user profiles, evolutionary cs, phytomonitoring, comparison of plot information, and arking. Evolutionary dynamics allow the user to monitor changes or patterns in s chemical and/or nutrient concentrations in the aqueous samples (soil solution), plants, fruit, or other contributing factors such as, e.g., irrigation and fertilization. Upper and lower limits may be included as guidelines in the graphical representations. These limits may vary over the life cycle of the plant species. Comparison of plots (or monitored areas) allows corrective measures to be tailored for each monitored area.

Phytomonitoring allows the user to compare the effects of multiple parameters to other monitored environmental conditions. As indicated in Appendix A, the allocation of irrigation can vary with the crop cycle of the plant species as well as with the ofthe plant. tion results for various parameters for irrigation water, soil composition, and plants may also be presented for user access. The evaluation results may also include corrective measures as discussed above, which are identified based upon the evaluation results. For example, the soil monitoring and control application may provide one or more additives for addition to the irrigation water to improve the chemical composition of the root activity zone to increase growth and productivity. A user may also access client databases to evaluate historical data. One or more monitored parameter(s) may be selected for rendering.

The historical ation may be displayed as a spread sheet or may be rendered in one of a plurality of graphical formats.

In on, a variety of reports may be generated by the soil monitoring and control application. For e, automatic interpretations of the sample analysis may be provided in a report such as, e.g., nutritional analysis of the root ty zone as shown in Appendix C. Such a report can e profile information related to, e.g., salinity, pH, nutritional/chemical composition, and micro and/or macro elements. The report may also include corrective actions that may be implemented to restore and/or in the chemical composition of the soil substrate in balance. For example, the report may indicate suitable washes and/or additive(s) for ation to the soil substrate. The report may also include the amount of additive(s) that should be added to irrigation water, based at least in part upon the results of the aqueous solution analysis, to restore a ble chemical/nutritional composition to the root activity zone and/or soil substrate. The amount of ve(s) may be based upon the evaluated levels of ions, chemicals, WO 28232 and/or nutrients. For example, a table or database may provide a ended amount based at least in part upon the concentration levels, concentration ratio (CR), utilization rate (UR), and/or consumption index (CI). In other implementations, the recommended amount may be determined based at least in part upon the evaluations of the concentration levels, CR, UR, and/or CI using pattern recognition, neural network evaluation, and/or other rule based fication methods as can be appreciated.

Referring next to shown is a flow chart illustrating an example of the evaluation that may be d out in block 315 of Chemical composition, concentration ratio (CR), utilization rate (UR), and/or consumption index (CI) can be evaluated based at least in part upon the sample is of block 312 (.

Each condition ofthe obtained samples may be analyzed and evaluated individually or in conjunction with conditions of the same or other samples to determine the corrective measures of block 318 (. Beginning with block 603, a plant species is ined for the tion of the analyzed samples. For example, a user may identify the species of the plant 109 ( through a user interface or the species may be determined based upon information associated with the obtained s or the location the samples were obtained from (e.g., from a user profile stored in a data store). The stage in the growth cycle of the identified plant species is determined in block 606. For example, the stage in the growth cycle may be based upon the current time of the year. The growth cycle may be defined in terms of different growth stages during the growing season at the location of the plant species. In some implementations, the growth cycle is defined by the month of the year. Months in which the plant species are dormant may not be considered. The stage ofthe growth cycle may also be adjusted based at least in part upon the 2012/002718 maturity of the plant (e.g., a young plant or adult plant). The age of the plant may also be determined.

Results ofthe analysis ofthe aqueous samples, plant tissue samples, izer solution (FS) samples, and/or irrigation water samples may be used in the evaluation of the availability, balances, intakes, and rate of use of the nutrients over the growth cycle of the plant 109. For example, in block 609 the analysis results of the aqueous samples may be evaluated to determine the condition of the root activity zone 112 (. Chemical, mineral, nutrient, ion, and/or conductivity levels ofthe aqueous samples may be examined and compared to predefined levels associated with the plant species. The predefined levels may define two or more ranges. The ranges may be d for an average level of the chemical, mineral, nutrient, ion, and/or conductivity hout the root activity zone 112 or for each depth of the root activity zone 112. For instance, the ined levels may define a desired range based upon upper and/or lower limits. For example, the level of N03‘ and Cl’ within the root activity zone 112 can be examined and compared to predefined levels ated with the plant species. Tables 1 and 6 illustrate examples of predefined levels for low, medium (or desired), and high ranges for some chemical compounds and microelements in the root activity zone 112. in other implementations, a desired level may be specified with defined upper and lower tolerances. In some cases, predefined levels may be specified for other combinations of ranges such as, 9.9., very low, low, desired, high, and very high.

In on, concentration ratios with respect to other ions, chemicals, and/or nutrients in the aqueous samples may also be determined and evaluated.

For e, the level of other combinations such as, e.g., K+/Na+, K+/Mg++, +, CaH/Mg“, and/or NO_o,‘/NH4+ within the root activity zone 112 may also be evaluated based upon predefined . Tables 2-5 illustrate examples of ined levels for low and adequate (or desired) ranges for s ratios of ions or combinations of ions. The predefined levels for the concentrations and/or ratios may be based at least in part upon historical data and the growth patterns of the plant species. The levels (or ranges) may be varied based at least in part upon the growth cycle and/or maturity of the identified plant species. The predefined levels may change as the growth cycle moves from initial growth to producing blooms to pment and ripening of the fruit. The predefined levels may also vary with the maturity of the plant. As the plant species ages, the nutritional needs of the plant changes. In addition, as the root depth changes the predefined levels may adjust for different depth levels of the root activity zone 112.

In block 612, the condition of the plant 109 may be evaluated based at least in part upon the analysis of the plant tissue samples. Plant tissue samples may be taken from, e.g., the foliage, stem, fruit, flowers, and/or roots of the plant 109 and ed in block 312 of Chemical, mineral, nutrient, and/or tivity levels of the plant tissue samples may be examined and compared to predefined levels associated with the plant species. Concentration ratios with respect to other ions, chemicals, and/or nutrients in the plant tissue samples may also be determined and evaluated. As described above, the predefined levels may be defined as a plurality of ranges, which may be based at least in part upon historical data and the growth cycle of the plant species. The predefined levels (or ranges) may be varied based at least in part upon where the plant tissue sample was obtained, the growth cycle, and/or maturity ofthe identified plant s. The growth cycle may be defined in terms of different growth stages during the growing season at the location ofthe plant species. In some implementations, the growth cycle is defined by the month of the year and may include months in which the plant species are dormant.

In block 615, the condition of the FS 115 ( is evaluated based at least in part upon the sample analysis of block 312 (. Chemical, mineral, nutrient, and/or conductivity levels of the FS samples may be examined and compared to predefined levels. Concentration ratios with t to other ions, chemicals, and/or nutrients in the plant tissue samples may also be ined and evaluated. The trations and/or ratios may be the same or ent than those evaluated for the aqueous samples. The predefined levels may define a plurality of ranges such as, e.g., a desired range based upon high and/or low level limits for some ions, chemicals, nts, and/or microelements in the FS 115. In other entations, a desired level may be ied with defined upper and lower tolerances. In some cases, predefined levels may be specified for other combinations of ranges such as, e.g., very low, low, desired, high, and very high.

The predefined levels (or ranges) may be varied based at least in part upon the growth cycle of the plant 109.

The interaction between the different conditions of the aqueous samples, the plant tissue samples, and/or FS samples in evaluated in block 618. As discussed with respect to the utilization, absorption, and/or consumption of some ions, chemicals and nutrients may be affected by the concentration of other ions, chemicals, microelements and/or other nutrients. Different combinations of elements in the aqueous, plant tissue, and FS s may be evaluated in block 618. Key indicators that may be used in the evaluation include the concentration ratio (CR), utilization rate (UR), and consumption index (CI) for various ions, chemicals, and/or nutrients. For example, the CR, UR, and/or CI may be determined and evaluated for one or more of anions such as, e.g., N033 H2PO4', HCOg‘, CO3=, and/or 804:; cations such as, e.g., Ca”, Mg”, K+, and/or NH4+; and/or lements such as, e.g., B, Fe, Mn, Cu, Zn, Mo, and/or Urea. The UR for the anions may be determined using, e.g., Cl' as the marker ion and the UR for the cations may be determined using, e.g., Na+ as the marker ion. The CR, UR, and/or CI may also be determined and evaluated for one or more macronutrients such e.g., phosphorous and/or nitrogen based upon one or more anions and/or cations.

The CR, UR, and/or CI may be compared to predefined levels defining a plurality of ranges, which may be varied based at least in part upon the growth cycle and/or maturity of the identified plant species.

Recommendations for corrective measures are then determined in block 621. The recommendations may be determined based at least in part upon the evaluations of the ed samples using, e.g., pattern recognition, neural k evaluation, and/or other rule based identification methods as can be iated.

The recommendations can include, but are not limited to, changes to the chemical composition of the FS 115. The recommendations may be take into account the ion (or quality) of the irrigation water (block 624) as determined from analysis of irrigation water samples and/or the condition of the soil in the activity zone 112 (block 627), which may have been determined from the initial samples taken during the installation ofthe suction probes 106. Chemical, nutrient and/or ion concentrations and/or ratios of different chemicals, nutrients, or ions may be determined as described above. The endation may also account for the unused portion of the chemicals, nutrients, and/or ions that remain at the various depths of the root activity zone 112 and/or the ns of the als, nutrients, and/or ions that are lost. Recommendation may include the current condition of the chemicals, microelements, pH, electrical conductivity, and/or other nts in the activity zone 112, the plant , and/or the FS 115 as well as recommended corrections to return the conditions to their desired levels. The recommendations may include specified s of chemicals and/or nutrients to the FS 115. The addition of a ic chelating agent may also be recommended based upon the current or projected pH of the activity zone 112. In other cases, the recommendations may also include the addition of irrigation water to the FS 115 to reduce levels of certain elements. The recommendations may be based upon ion, al and nutrient levels throughout the root activity zone 112. ln some cases, the recommendations may take into account the concentrations at different depths within the activity zone 112.

For example, t en levels may be compared to desired levels at that stage in the growth cycle to determine if adjustments may be recommended.

This may include comparison of concentrations at one or more of the probe depths to determine whether the corresponding nitrogen levels need to be adjusted.

Current levels in the FS 115 can also be considered in the evaluation. Key indicators such as CRN, URN, and/or CIN may be determined and utilized to determine the endations for corrective measures to ate or reduce the environmental effects. The relationship between the analyzed levels and predefined levels corresponding to the plant 109 may be used to determine if the nitrogen level of the FS 115 should be adjusted by increasing or reducing the levels of, 9.9, NO3' and/or NH4+. If the nitrogen is below or above the desired range, then the current condition may be reported and recommendations may be provided to adjust the conditions. In some cases, the amount of increase or decrease in the chemicals and/or nutrients added to the FS 115 may be determined based at least in part upon WO 28232 the deviation from the desired range. In addition, the ncy of the addition may be provided.

Changes n the t and previous nitrogen levels in plant samples from the leaves, stalks, sap, etc, as well as variations from historical profiles over the growth cycle of the plant 109 may also be evaluated and used to determine the recommended adjustment. The interaction with other chemicals and/or nutrients and the effect on absorption and utilization by the plant 109 may also be accounted for. For instance, the relationship between the concentrations of N03‘ and Cl" can be ed to determine ifthe riate ratio exists for the plant 109. Based upon these relationships, recommendations regarding adjustments to the FS 115 may be adjusted. For example, if analysis of the aqueous and plant samples indicates that the nitrogen levels are above the predefined level in the root activity zone 112 but are below the predefined level in the plant, the recommendation may be to maintain the current nitrogen level in the FS 115 to ensure that the needs of the plant 109 are met. This recommendation may take into account the stage in the growth cycle and/or the historical profile of the plant 109, as well as current pH level and electrical conductivity.

Similar evaluations may be carried out for other ions, chemicals and/or nutrients such as, e.g., phosphorus, potassium, calcium, magnesium, ammonium, chlorides, sodium, and/or microelements such as, e.g., iron, manganese, copper, zinc, boron, and/or molybdenum. Key indicators such as CR, UR, and/or CI can be determined for one or more of these ions, chemicals and/or nutrients and utilized to determine a recommendation. The relationship between the ed levels and predefined levels corresponding to the plant 109 may be used to determine if the chemical and/or nutrient level of the FS 115 should be ed. The interaction with other chemicals and/or nts and the effect on absorption, utilization and consumption by the plant 109 may also be accounted for. For potassium, the relationships n the concentrations of K+ and Na+ and/or K+ and Mg++ can be examined to ine if the appropriate ratios exist for the plant 109. For calcium, the relationships between the concentrations of Ca++ and Na+ and/or Ca++ and Mg“ can be examined to determine if the appropriate ratios exist. For magnesium, the relationship between the concentrations of Ca++ and Mg++ can be ed to determine if the appropriate ratio exists. The recommendation of one chemical and/or nutrient may be adjusted to take into account changes in the endation of another chemical and/or nutrient.

If accumulation of one or more microelement(s) is detected, then an appropriate chelating agent (e.g., EDTA, DTPA, EDDHA) may be recommended, while taking into account the current and/or projected pH levels of the root activity zone 112. Adjustment to amino acids, monoammonium phosphate, monopotasium phosphate, magnesium nitrate, and/or calcium fertilizers that are provided to the plant 109 may also be recommended based upon the evaluation of the is information. Recommendations regarding adjustments to the tion patterns and/or amounts may also be recommended based upon the available information.

Drainage and aeration conditions may also be evaluated.

The recommendations may also take into t the locations of the different s within the field where the plants 109 are located. For example, adjustments to the ration of the irrigation system may be recommended based at least in part upon differences in the chemical and/or nutrient levels at different locations within the field. Differences in the soil composition at different locations within the field may also be accounted for by recommending different WO 28232 ization solutions 115 for use in different areas of the field. In addition, corrections to the irrigation practices may be recommended such as, e.g., increasing or decreasing the tion cycle. In some cases, variations in weather conditions (current and/or predicted) may also be taken into t when determining the corrective recommendations. Other cultivation operations may also be recommended based at least in part upon the evaluation of the aqueous, plant tissue, and FS samples Referring now to shown is an example of a system 700 that may be utilized in the monitoring and l of soil conditions. The system 700 es one or more computing device(s) 703 and one or more user device(s) 706. The computing device 703 includes at least one processor circuit, for example, having a processor 709 and a memory 712, both of which are coupled to a local interface 715.

To this end, the ing device(s) 703 may comprise, for e, a server computer or any other system providing ing capability. The computing device(s) 703 may include, for example, one or more display devices such as cathode ray tubes (CRTs), liquid crystal display (LCD) screens, gas plasma-based flat panel displays, LCD projectors, or other types of display devices, etc. The computing device(s) 703 may also include, for example various peripheral devices.

In particular, the peripheral devices may include input devices such as, for example, a keyboard, keypad, touch pad, touch screen, microphone, scanner, mouse, joystick, or one or more push buttons, etc. Even though the computing device 703 is referred to in the singular, it is tood that a plurality of computing devices 703 may be employed in the various arrangements as described above. The local interface 715 may comprise, for example, a data bus with an accompanying address/control bus or other bus structure as can be appreciated.

Stored in the memory 712 are both data and several components that are executable by the processor 709. In particular, stored in the memory 712 and executable by the processor 709 are a soil monitoring and control application 718 and potentially other applications. Also stored in the memory 712 may be a data store 721 and other data. The data stored in the data store 721, for example, is associated with the operation of the various applications and/or functional entities described below. For example, the data store may include sample analysis results, corrective measures, and other data or information as can be understood. In addition, an operating system 724 may be stored in the memory 712 and executable by the processor 709. The data store 721 may be may be located in a single computing device or may be dispersed among many different devices.

The user device 706 is representative of a ity of user devices that may be communicatively coupled to the computing device 703 through a k 727 such as, e.g., the Internet, intranets, extranets, wide area networks , local area networks (LANs), wired networks, wireless networks, networks configured for communication over a power grid, or other suitable ks, etc, or any combination of two or more such networks. In some embodiments, a user device 706 may be ly connected to the computing device 703.

The user device 706 may se, for example, a sor-based system such as a computer system. Such a computer system may be embodied in the form of a desktop computer, a laptop computer, a personal digital assistant, a cellular telephone, web pads, tablet computer systems, or other devices with like capability. The user device 706 includes a display device 730 upon which s network pages 733 and other t may be rendered. The user device 706 may be configured to execute various applications such as a browser application 736 and/or other applications. The browser application 736 may be executed in a user device 706, for example, to access and render network pages 733, such as web pages, or other k content served up by the ing device 703 and/or other servers. The user device 703 may be ured to execute applications beyond browser application 736 such as, for example, e-mail applications, instant message (IM) applications, and/or other applications.

The ents executed on the computing device 703 include, for example, a soil ring and control application 718 and other systems, applications, services, processes, engines, or functionality not discussed in detail herein. The soil monitoring and l application 718 can generate network pages 733 such as web pages or other types of network content that are provided to a user device 706 in response to a request for the purpose of viewing stored data or recommended corrective measures.

It is understood that there may be other applications that are stored in the memory 712 and are executable by the processor 709 as can be appreciated.

Where any component discussed herein is implemented in the form of software, any one of a number of programming languages may be employed such as, for example, C, C++, C#, Objective C, Java, Java , Perl, PHP, Visual Basic, Python, Ruby, Delphi, Flash, or other programming languages.

A number of software components are stored in the memory 712 and are executable by the processor 709. In this respect, the term "executable" means a program file that is in a form that can ultimately be run by the processor 709.

Examples of executable programs may be, for example, a compiled program that can be ated into machine code in a format that can be loaded into a random access portion of the memory 712 and run by the processor 709, source code that may be expressed in proper format such as object code that is capable of being loaded into a random access portion of the memory 712 and executed by the processor 709, or source code that may be interpreted by another executable program to te instructions in a random access portion of the memory 712 to be executed by the processor 709, etc. An executable program may be stored in any n or component of the memory 712 including, for example, random access memory (RAM), read—only memory (ROM), hard drive, solid-state drive, USB flash drive, memory card, optical disc such as compact disc (CD) or digital versatile disc (DVD), floppy disk, magnetic tape, or other memory components.

The memory 712 is defined herein as including both le and nonvolatile memory and data storage components. Volatile components are those that do not retain data values upon loss of power. Nonvolatile components are those that retain data upon a loss of power. Thus, the memory 712 may se, for example, random access memory (RAM), read-only memory (ROM), hard disk drives, solid-state drives, USB flash drives, memory cards accessed via a memory card reader, floppy disks accessed via an associated floppy disk drive, l discs accessed via an optical disc drive, magnetic tapes accessed via an appropriate tape drive, and/or other memory components, or a combination of any two or more of these memory components. In addition, the RAM may se, for example, static random access memory (SRAM), dynamic random access memory (DRAM), or ic random access memory (MRAM) and other such devices. The ROM may comprise, for example, a programmable read-only memory (PROM), an erasable mmable read-only memory (EPROM), an electrically erasable programmable read—only memory (EEPROM), or other like memory device.

Also, the processor 709 may represent le processors 709 and the memory 712 may represent multiple memories 712 that operate in parallel processing circuits, respectively. In such a case, the local interface 715 may be an appropriate network that facilitates communication n any two ofthe multiple processors 709, between any processor 709 and any of the memories 712, or between any two of the memories 712, etc. The local interface 715 may comprise additional systems designed to nate this communication, including, for example, performing load ing. The processor 709 may be of electrical or of some other available construction. gh the soil monitoring and control application 718, and other various s described herein, may be embodied in software or code executed by general e hardware as discussed above, as an alternative the same may also be embodied in dedicated hardware or a combination of software/general purpose hardware and dedicated hardware. If embodied in dedicated hardware, each can be implemented as a circuit or state machine that employs any one of or a combination of a number of technologies. These technologies may include, but are not limited to, discrete logic circuits having logic gates for implementing various logic functions upon an application of one or more data signals, application ic integrated circuits having appropriate logic gates, or other components, etc. Such technologies are generally well known by those skilled in the art and, consequently, are not described in detail herein.

The arts of FIGS. 3 and 6 show the functionality and operation of an implementation of portions of a soil monitoring and control application 718. if embodied in software, each block may represent a module, segment, or portion of code that comprises program instructions to ent the specified logical function(s). The program instructions may be embodied in the form of source code that comprises human-readable statements written in a programming language or machine code that comprises cal instructions recognizable by a suitable execution system such as a processor 709 in a computer system or other system.

The machine code may be ted from the source code, etc. If embodied in hardware, each block may represent a circuit or a number of onnected circuits to implement the specified logical function(s).

Although the flowcharts of FIGS. 3 and 6 show a specific order of execution, it is understood that the order of execution may differ from that which is depicted. For example, the order of execution of two or more blocks may be scrambled relative to the order shown. Also, two or more blocks shown in sion in FIGS. 3 and/or 6 may be executed concurrently or with l concurrence. Further, in some embodiments, one or more of the blocks shown in FIGS. 3 and/or 6 may be skipped or omitted. In addition, any number of counters, state variables, warning semaphores, or messages might be added to the logical flow described herein, for purposes of enhanced utility, accounting, performance measurement, or providing troubleshooting aids, etc. It is understood that all such variations are within the scope of the present disclosure.

Also, any logic or application described herein, including soil monitoring and control application 718, that comprises software or code can be ed in any non-transitory computer-readable medium for use by or in connection with an instruction execution system such as, for example, a processor 709 in a computer system or other system. In this sense, the logic may comprise, for e, statements ing instructions and ations that can be fetched from the computer-readable medium and ed by the instruction execution system. In the context of the present disclosure, a "computer-readable medium" can be any medium that can contain, store, or maintain the logic or ation bed herein for use by or in connection with the instruction execution . The computer- readable medium can comprise any one of many physical media such as, for example, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor media. More specific examples of a suitable computer-readable medium would include, but are not limited to, magnetic tapes, magnetic floppy diskettes, magnetic hard drives, memory cards, solid—state drives, USB flash drives, or optical discs.

Also, the computer-readable medium may be a random access memory (RAM) including, for example, static random access memory (SRAM) and dynamic random access memory , or magnetic random access memory (MRAM). In addition, the computer-readable medium may be a read—only memory (ROM), a programmable read-only memory (PROM), an le programmable read-only memory (EPROM), an ically erasable programmable read-only memory (EEPROM), or other type of memory . y described, one embodiment, among others, comprises a method including obtaining aqueous samples extracted from a plurality of n probes positioned at le depths within a soil substrate including a root activity zone of a plant species in the soil substrate; analyzing the aqueous samples to determine a chemical composition of the soil substrate; and determining amounts of an additive that is added to irrigation water supplied to the soil substrate to adjust the chemical composition of the soil substrate based at least in part upon the determined chemical composition and the plant species. At least one of the plurality of suction probes may be positioned within the root activity zone. Determining the chemical composition of the soil substrate may comprise determining a chemical composition of the root activity zone.

The method may se determining amounts of a plurality of additives that are added to the irrigation water supplied to the soil substrate to adjust the chemical composition of the soil substrate based at least in part upon the ined chemical composition and the plant species. The additive may comprise water, e water, fertilizer, or any combination thereof. The method may comprise obtaining a sample of a fertilizer solution (FS) that has been supplied to the soil substrate and analyzing the FS sample to determine a composition of the FS, wherein the determined amount of additive is based at least in part upon the determined FS ition. The F8 may be supplied to the soil substrate at least a predetermined time before extracting the s samples from the plurality of suction probes. The sample ofthe FS may be collected over an entire irrigation time during which the FS is supplied to the soil ate.

The method may comprise extracting the s samples from the plurality of suction probes. A vacuum may be drawn on each of the plurality of suction probes to induce hydraulic conduction of aqueous solutions from the soil substrate into each suction probe. The method may comprise obtaining a sample of the irrigation water and analyzing the irrigation water sample to determine a composition of the irrigation water, wherein the determined amount of additive is based at least in part upon the ined irrigation water composition. The method may comprise obtaining a tissue sample of the plant species in the root ty zone and analyzing the plant tissue sample to determine a nutritional condition of the plant. The method may comprise ing the determined amounts of additive that is added to the irrigation water to produce a fertilizer solution (FS) that is supplied to WO 28232 the soil substrate. The method may comprise mixing the determined amounts of additive with the irrigation water to produce the FS and applying the F8 to the soil substrate. The F8 may be applied through a drip line.

Another embodiment, among others, ses a method including installing a suction probe at a depth within a soil substrate; drawing a vacuum on the suction probe to induce hydraulic conduction of s solutions from the soil substrate into the suction probe; extracting an aqueous sample from the suction probe after applying the vacuum for a predetermined period of time; and ing the aqueous sample to determine a chemical composition at the depth of the soil substrate. The method may comprise installing a plurality of suction probes at multiple depths within the soil substrate; drawing a vacuum on each of the plurality of suction probes to induce hydraulic conduction of aqueous solutions from the soil substrate into each suction probe; extracting aqueous samples from the plurality of suction probes after applying the vacuum for the predetermined period of time; and analyzing the aqueous samples to determine a chemical ition at the different depths of the soil substrate.

The aqueous samples may be analyzed to determine al composition at different depths of the soil substrate. At least one of the plurality of suction probes may be installed within a root ty zone of a plant species in the soil substrate. The s samples may be analyzed to determine a chemical composition of the root activity zone. The method may comprise determining a corrective measure based at least in part upon the determined chemical composition of the root activity zone. The corrective measure may be a washing irrigation. The method may comprise ing a ity of soil samples at ent depths of the root activity zone. The method may comprise determining a corrective measure based at least in part upon the determined chemical composition of the soil substrate.

Another embodiment, among others, comprises a method including obtaining, by a computing device, a composition of a fertilizer solution (FS) that has been supplied to a soil ate including a root activity zone of a plant species; obtaining, by the computing device, a chemical composition within the root ty zone, the al composition determined by analysis of an aqueous sample obtained from a n probe oned within the root activity zone after the FS is supplied to the soil substrate; ining, by the computing device, nutrient utilization by the plant species based at least in part upon the FS composition and the chemical composition of the root ty zone; and providing, by the computing , an amount of additive that is added to irrigation water to produce a subsequent FS that is supplied to the soil substrate. The method may comprise obtaining the chemical composition at multiple depths within the root activity zone, the chemical composition determined by analysis of s samples obtained from suction probes positioned at the multiple depths ofthe root activity zone after the FS is supplied to the soil substrate.

The method may comprise obtaining the chemical composition at multiple depths within the root activity zone, the chemical composition determined by analysis of s s obtained from suction probes positioned at the multiple depths ofthe root activity zone after the FS is supplied to the soil substrate. The method may comprise obtaining nutritional status of the plant species that is based upon analysis of a tissue sample of the plant species and determining the amounts of nutrients for the subsequent FS based at least in part upon the determined nutrient utilization and the nutritional status of the plant species. Determining nutrient utilization may include evaluating marker ion concentrations determined by analysis ofthe aqueous . Determining nt utilization may include determining a en utilization rate and/or a potassium utilization rate.

It should be emphasized that the above-described embodiments of the present disclosure are merely possible examples of implementations set forth for a clear understanding of the principles of the disclosure. Many variations and modifications may be made to the above—described embodiment(s) without departing ntially from the spirit and principles of the disclosure. All such modifications and variations are intended to be ed herein within the scope of this disclosure and ted by the following claims.

It should be noted that ratios, concentrations, s, and other numerical data may be sed herein in a range format. It is to be understood that such a range format is used for convenience and brevity, and thus, should be interpreted in a flexible manner to include not only the numerical values explicitly recited as the limits of the range, but also to include all the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly recited. To illustrate, a concentration range of “about 0.1% to about 5%” should be interpreted to include not only the explicitly recited concentration of about 0.1 wt% to about 5 wt%, but also include individual concentrations (e.g., 1%, 2%, 3%, and 4%) and the sub-ranges (e.g., 0.5%, 1.1%, 2.2%, 3.3%, and 4.4%) within the indicated range. The term “about” can include traditional rounding according to significant s of numerical values. In addition, the phrase “about‘x’ to I I" l n) y includes “about‘x’ to about y . $2.333 _uu_Eu;u-_3_m>;a .3 .cozcmt‘: 9: a we +0 3:9. 3:36 :9: :9; 9:. >tm_Eu;u E 95 ft: Una UmnO $1,558; .95 :om 5 uf cotuznofi 2255030 .mco;utn_ou.a _au_Eu;u._uu_m>;n_ we 55.5% E 33:53.3 :9; +0 mumauhun 9.69523 Bambi m_.om 3 3:63 nam_ :3 5236 < :25 uf mach u .EufiuLm co «cf 2.3 20.6.2. 323; xficmanf E uf.

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OVdem .x. “— e $3233: uEudoTx. x \ \ \ 0.93 : _. = +x 301.0N7vzv fluudxé .5183: V V '3 Av -2 E3338; .m.~ Appendix A ALLOCATION OF IRRIGATION FOR PEACH-NECTARINE TO START FROM 3rd GREEN ACCORDING TO THE PHENOLOGICAL CYCLE I Beginning of sprouting-formation of fruit Provision of irrigation gm3/ha1 Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) Crop coefficient Kc = 0.5 Correction s : A Based on values provided by pressure meter T30cm < 15 ab f(Ts): 0.7 T30cm 15 - 20 ch f(Ts): 1 B Based on the water coefficient m <1.5 CI-water f(Ch): 1 CI-40cm >1.5 Cl—water f(Ch): 1.3 m <2 Cl-water f(Ch): 1.3 Cl-40cm >2 Cl-water f(Ch): 1.5 CI-60cm >3 Cl—water f(Ch): 1.7 ECéOcm >4.0 mmhos/cm f(Ch): 2 ECéOcm >3 ECwater f(Ch): 2 C Based on the activity Young planting lst green f(oc): 0.4 2nd green f(oc): 0.7 3rd green f(oc): 1 Adult planting f(oc): 1 D Based on the quality of water ers <25 meq/L f(Cag): 1.2 E Based on the difference in values between samplings CI-40cm current sample >1.3 Cl-40cm previous sample f(t): 1.2 m current sample >1.3 Cl-60cm previous sample f(t): 1,2 Limitation f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 2.5 II Hardening of skin Provision of irrigation lm3/ha1 Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) Crop coefficient Kc = 0.6 Correction factors 2 A Based on values ed by pressure meter T30cm < 10 cb f(Ts): 0.7 T30cm 12 - 20 cb f(Ts): 1 T60cm <1.8 T30cm f(Ts): 1 T60cm >1.8 T30cm f(Ts): 1.3 B Based on the water coefficient Cl-40cm <1.5 Cl-water f(Ch): 1 Cl-40cm >1.5 Cl-water f(Ch): 1.3 Cl-40cm <2 Cl-water f(Ch): 1.3 CI—40cm >2 Cl-water f(Ch): 1.5 Cl—60cm >3 Cl-water f(Ch): 1.7 Appendix A ECéOcm >4.0 mmhos/cm f(Ch): 2 ECéOcm >3 ECwaTer f(Ch): 2 C Based on The acTiviTy Young planTing lsT green f(oc)= 0.4 2nd green f(oc)= 0.7 3rd green f(oc)= 1 AdulT planTing f(oc)= 1 D Based on The y of waTer Cl-waTers <2.5 meq/L f(Cag): 1.2 E Based on The ence in values beTween samplings Cl-40cm current sample >1.3 Cl-40cm previous sample f(T): 1.2 Cl-60cm currenT sample >1.3 Cl—60cm previous sample f(T): 1.2 f(Ts) x f(Ch) x f(oc) x f(Cag) x f(T) < 2,0 Si (NH4+)60cm > 0.03 meq/L f(Ts) x f(Ch) x f(oc) x f(Cag) x f(T) < 1.5 III DevelopmenT of The fruiT Provision of irrigaTion ): Dr = ETO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(T) Crop coefficienT Kc = 0.8 CorrecTion facTors : A Based on values provided by pressure meTer T30cm 10 - 18 cb f(Ts): 1 T30cm <10 cb f(Ts): 0.8 T60cm >1.8 T30cm f(Ts): 1.3 B Based on The waTer coefficienT Cl-40cm <1.5 Cl-waTer f(Ch): 1 Cl-40cm >1.5 Cl-waTer f(Ch): 1.3 Cl-40cm <2 Cl—waTer f(Ch): 1.3 Cl—40cm >2 Cl-waTer f(Ch): 1.5 Cl-60cm >3 Cl-waTer f(Ch): 1.7 ECbOcm >4.0 mmhos/cm f(Ch): 2 EC60cm >3 ECwaTer f(Ch): 2 C Based on The acTiviTy Young planTing lsT green f(oc)= 0.4 2nd green f(oc): 0.7 3rd green f(oc)= 1 AdulT planTing f(oc)= 1 D Based on The y of waTer ers <25 meq/L f(Cag): 1.2 E Based on The difference in values beTween samplings CI-40cm currenT sample >1.3 Cl-40cm previous sample f(T): 1.2 Cl-60cm currenT sample >1.3 Cl—60cm previous sample f(T): 1.2 LimiTaTion f(Ts) x f(Ch) x f(oc) x f(Cag) x f(T) < 1.9 WO 28232 Appendix A Si 60cm > 0.04 meq/L f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 1.5 IV Ripening of fruit-harvest Provision of irrigation (m3/ha): Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) Crop coefficient Kc = 0.7 Correction factors : A Based on values provided by pressure meter T30cm 10 - 18 Cb f(Ts)= 1 T30cm <10 cb f(Ts)= 0.8 T60cm >1.8 T30cm f(Ts)= 1.3 B Based on the water coefficient Cl—40cm <1.5 Cl-water f(Ch): 1 Cl-40cm >1.5 Cl—water f(Ch): 1.3 Cl-40cm <2 Cl-water f(Ch): 1.3 CI—40cm >2 Cl-water f(Ch): 1.5 Cl-60cm >3 Cl—water f(Ch): 1.7 ECGOcm >4.0 mmhos/cm f(Ch): 2 EC60cm >3 r f(Ch): 2 C Based on the activity Young planting lst green f(oc): 0.4 2nd green f(oc): 0.7 3rd green f(oc): 1 Adult planting f(oc): 1 D Based on the quality of water Cl-waters <25 meq/L f(Cag): 1.2 E Based on the difference in values between samplings m current sample >1.3 Cl-40cm previous sample f(t): 1.2 Cl-60cm current sample >1.3 m previous sample f(t): 1.2 Limitation f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 1.3 V Post-harvest I - up to 10 days after collection Provision of irrigation (m3/ha): Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) Crop coefficient Kc = 0.5 Correction factors : A Based on values provided by re meter T30cm 20 — 3O cb f(Ts): 1 T30cm <15 cb f(Ts)= 0.7 T60cm >2 T30cm f(Ts): 1.1 B Based on the water coefficient Cl-40cm <1.5 Cl-water f(Ch): 1 Cl-40cm >1.5 Cl-water f(Ch): 1.3 Cl-40cm <2 Cl-water f(Ch): 1.3 Cl-40cm >2 Cl-water f(Ch): 1.5 Cl-60cm >3 Cl—water f(Ch): L7 Appendix A ECéOcm >4.0 cm f(Ch)= 2 ECéOcm >3 ECwater f(Ch)= 2 C Based on the activity Young planting lst green f(oc)= 0.4 2nd green f(oc)= 0.7 3rd green f(oc)= Adult planting f(oc)= 1 D Based on the y of water Cl—waters <2.5 meq/L f(Cag): 1.2 E Based on the difference in values between samplings Cl—40cm current sample >1.3 CI—40cm previous sample f(t): 1.2 Cl-60cm current sample >1.3 Cl-60cm previous sample f(t): 1.2 Limitation ffl's) x f(Ch) x f(oc) x f(Cag) x f(t) < 1.2 VI Post-harvest II - of 10 to 25 days after collection Provision of irrigation gm3/ha): Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) Crop cient Kc = 0.4 Correction factors : A Based on values provided by pressure meter T30cm 20 - 30 ch f(Ts): 1 T30cm <15 cb f(Ts): 0.7 T60cm >2 T30cm f(Ts): 1.1 B Based on the water coefficient Cl-40cm <1.5 Cl-water f(Ch)= 1 Cl—40cm >1.5 Cl-water f(Ch)= 1.3 CI-40cm <2 Cl-water f(Ch)= 1.3 Cl-40cm >2 Cl-water f(Ch)= 1.5 m >3 Cl—water f(Ch)= 1.7 ECéOcm >4.0 cm f(Ch): 2 ECéOcm >3 ECwater f(Ch)= 2 C Based on the activity Young planting lst green f(oc)= 0.4 2nd green f(oc): 0.7 3rd green f(oc)= 1 Adult planting f(oc)= 1 D Based on the quality of water CI-waters <2.5 meq/L f(Cag): 1.2 E Based on the difference in values between ngs Cl-40cm current sample >1.3 Cl-40cm previous sample f(t): 1.2 (El—60cm current sample >1.3 Cl—60cm previous sample f(t): 1.2 Limitation f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) ( 1_2 VII End of cycle Provision of irrigation (m3/ha): Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) Appendix A Crop coefficient Kc = 0.3 Correction factors : A Based on values ed by pressure meter T30cm 30 - 50 ab f(Ts): 1 T30cm <25 cb f(Ts): 0.7 B Based on the water coefficient m <15 CI-water f(Ch): 1 Cl-40cm >1.5 Cl-water f(Ch): 1.3 CI-40cm <2 Cl-water f(Ch): 1.3 Cl—40cm >2 Cl-water f(Ch): 1.5 Cl-éOcm >3 Cl—water f(Ch): 1.7 ECéOcm >4.0 mmhos/cm f(Ch)= 2 ECbOcm >3 ECwater f(Ch): 2 C Based on the activity Young planting lst green f(oc): 0.4 2nd green f(oc): 0.7 3rd green f(oc): 1 Adult planting f(oc): 1 D Based on the quality of water CI-waters <25 meq/L f(Cag)= 1.2 E Based on the difference in values between ngs Cl-40cm current sample >1.3 Cl—40cm previous sample f(t): 1.2 CI-60cm current sample >1_3 Cl-60cm previous sample f(t): 1.2 Limitation f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 1 2012/002718 Appendix A ALLOCATION OF IRRIGATION FOR PEACH—NECTARINE TO START FROM lst-an GREEN ACCORDING TO THE PHENOLOGICAL CYCLE I Beginning of sprouting-formation of fruit Provision of irrigation (m3/ha) Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) Crop cient Kc = 0.5 Correction factors : A Based on values provided by pressure meter T30cm < 15 cb f(Ts): 0.7 T30cm 15 - 20 ch f(Ts): 1 B Based on the water coefficient Cl-40cm <1.5 Cl—water f(Ch): 1 Cl—40cm >1.5 Cl-water f(Ch): 1.3 Cl-40cm <2 Cl-water f(Ch): 1.3 Cl-40cm >2 Cl—water f(Ch): 1.5 Cl—60cm >3 Cl-water f(Ch): 1.7 EC60cm >4.0 mmhos/cm f(Ch): 2 ECéOcm >3 ECwater f(Ch): 2 C Based on the activity Young planting lst green f(oc): 0.4 2nd green f(oc): 0.7 3rd green f(oc): 1 Adult planting f(oc): 1 D Based on the y of water ers <2.5 meq/L f(Cag): 1.2 E Based on the difference in values between samplings m current sample >1.3 Cl—40cm previous sample f(t): 1.2 Cl-60cm current sample >1.3 Cl-60cm previous sample f(t): 1.2 Limitation f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 2,5 II Hardening of skin ion of irrigation (m3/hal Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) Crop coefficient Kc = 0.6 Correction factors : A Based on values provided by pressure meter T30cm < 10 ch f(Ts): 0.7 T30cm 12 - 20 cb f(Ts): 1 T60cm <1.8 T30cm f(Ts): 1 T60cm >1.8 T30cm f(Ts): 1.3 B Based on the water coefficient Cl-40cm <1.5 Cl-water f(Ch): 1 Cl-40cm >1.5 Cl-water f(Ch): 1.3 Cl-40cm <2 Cl-water f(Ch): 1.3 Cl-40cm >2 Cl—water f(Ch): 1.5 CI—éOcm >3 Cl—water f(Ch): 1.7 Appendix A ECéOcm >4.0 mmhos/cm f(Ch)= 2 ECéOcm >3 ECwater f(Ch)= 2 C Based on the activity Young planting lst green f(oc): 0.4 2nd green f(oc): 0.7 3rd green f(oc): 1 Adult planting f(oc): 1 D Based on the quality of water Cl-waters <2.5 meq/L f(Cag): 1.2 E Based on the difference in values between samplings Cl-40cm current sample >1.3 Cl-40cm previous sample f(t): 1.2 Cl-60cm current sample >1.3 m previous sample f(t): 1.2 Limitation f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 2,0 Si (NH4+)60cm > 0.03 meq/L f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 1.5 III pment of the fruit Provision of irrigation (MS/ha): Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(tiempo) Crop coefficient Kc = 0.8 Correction factors : A Based on values provided by pressure meter T30cm 10 - 18 cb f(Ts): 1 T30cm <10 cb f(Ts): 0.8 T60cm >1.8 T30cm f(Ts): 1.3 B Based on the water coefficient (II—40cm <1.5 er f(Ch)= 1 Cl-40cm >1.5 Cl-water f(Ch)= 1.3 Cl-40cm <2 Cl—water‘ f(Ch)= 1.3 Cl—40cm >2 er f(Ch)= 1.5 Cl-60cm >3 Cl-water f(Ch)= 1.7 ECéOcm >4.0 mmhos/cm f(Ch): 2 EC60cm >3 r f(Ch): 2 C Based on the ty Young planting lst green f(oc): 0.4 2nd green f(oc): 0.7 3rd green f(oc): 1 Adult planting f(oc): 1 D Based on the quality of water Cl—waters <25 meq/L f(Cag): 1.2 E Based on the difference in values between samplings Cl-40cm current sample >1.3 Cl—40cm previous sample f(t): 1.2 Cl-60cm current sample >1.3 Cl-60cm previous sample f(t): 1.2 f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 1.9 Appendix A Si (NH4+)60cm > 0.04 meq/L f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 1.5 V End of cycle Provision of irrigation (m3/ha): Dr = EtO x 10 x Kc x f(Ts) x f(Ch) x f(oc) x f(Cag) x f(tiempo) Crop coefficient Kc = 0.5 Correction factors : A Based on values ed by pressure meter T30cm 20 - 30 ab f(Ts): 1 T30cm <15 cb f(Ts): 0.7 T60cm >2 T30cm f(Ts): 1.1 B Based on the water coefficient Cl—40cm <15 Cl-water f(Ch): 1 Cl-40cm >1.5 er f(Ch): 1.3 Cl-40cm <2 Cl-water f(Ch): 1.3 Cl—40cm >2 Cl-water f(Ch): 1.5 Cl-60cm >3 Cl—water f(Ch): 1.7 ECéOcm >4.0 mmhos/cm f(Ch): 2 EC60cm >3 ECwater f(Ch): 2 C Based on the ty Young planting lst green f(oc): 0.4 2nd green f(oc): 0.7 3rd green f(oc): 1 Adult planting f(oc): 1 D Based on the quality of water Cl-waters <25 meq/L f(Cag): 1.2 E Based on the difference in values between samplings Cl-40cm current sample >1.3 Cl-40cm previous sample f(t): 1.2 Cl-éOcm current sample >1.3 m previous sample f(t): 1.2 Limitation f(Ts) x f(Ch) x f(oc) x f(Cag) x f(t) < 1.2 m. i fiéwfififiwmfimmmfiflwan: CO_H_.m3_m>m mmmmnfimv mEvtmEcucwm 3583qu E26 Hmwhmuc_ 52894 EEC 34"... .m «4%«ammfiwflmd; a} .8383.

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Macaw WV fig EH; L , ZN g m: m: “53>“ @m m m_ “mam. xficmaa< new “mama 0.2530 uzuu Appendix C Date: Crop: Citrus Fruit Parcel: Variety: Mandarin Saline e Mid-EC of the fertilizer solution Elec. Cond. Slight salt stress in the root activity area le salt wash Mid CI concentration within the feitiiiz'ei'soiution ne High CI concentration in soil solution, possible toxicity risk Suitable salt wash Pértilizer solution containing high Na concentration High Na concentration in soil, toxicity risk and clay dispersion cient Na wash, unsuitable irrigation dose/ frequency‘ pH profile S.F.R. Low pH at the ESL Soil Optimal soil pH. Conditions of high solubility of most nutrients The acidic pH of the soil makes ent the use of chelating agent EDT/537 Nutritional profile Medium Nitrogen content in the PSI.

Correct NO3—lCi— ratio in the F.S.l.

Nitrogen High uptake of the dose of nitrogen applied Low NO3—ICI— ratio in the soil solution due to excess of Cl Low Phosphorus content in the F.S.I.

Phosphorous High Phosphorus availability in the higher density of roots area Optimal Phosphorus solubility conditions Medium Potassium content in the F.S.l.

Potasium Medium uptake of the applied Potassium dose Very high Calcium content in the ESL Balanced m concentration respect to the Sodium in the F.S.I.

Calcium Favourable Ca/Mg ratio in the F.S.I. for the Calcium absorption High Calcium concentration in the soil solution Low Ca/Na ratio in the soil solution because of the low Calcium content.

High Magnesium content in. the F.S.I.

Magnesium Unfavourable Ca/Mg ratio in the F.S.I. for the ium tion due to high Ca t Fe Very high iron content in the F.S.I. and medium availability in the soil Micro Mn Very high Manganese content in the F.S.I. and Very high availability in the soil Elements Cu Very high Copper content in the F.S.I. and Very high availability in the soil Zn Very high Zinc content in the F.S.l. and Very high bility in the soil B Very high Boron content in the F.S.l. and Very high availability in the soil

Claims (19)

CLAIMS Therefore, at least the ing is claimed:

1. A method, sing: obtaining an aqueous sample extracted from a suction probe positioned within a soil substrate including a root activity zone of a plant s in the soil substrate; analyzing the aqueous sample to determine a chemical ition of the soil substrate aqueous sample, the chemical composition comprising concentrations of one or more marker ions; determining nutrient utilization by the plant species based at least in part upon the concentrations of said marker ions; and determining a corrective action to adjust the chemical composition of the soil substrate based at least in part upon the ined nutrient utilization of the plant species.

2. The method of claim 1, wherein the corrective action comprises determining an amount of an additive that is added to irrigation water supplied to the soil substrate to adjust the chemical composition of the soil substrate based at least in part upon the determined nutrient utilization of the plant species.

3. The method of claim 2, further comprising determining amounts of a plurality of additives that are added to the irrigation water supplied to the soil substrate to adjust the chemical ition of the soil substrate based at least in part upon the ined chemical composition and the plant species.

4. The method of claim 2, wherein the additive comprises water or residue water.

5. The method of claim 2, wherein the additive es fertilizer.

6. The method of claim 2, further comprising: obtaining a sample of a fertilizer solution (FS) that has been supplied to the soil substrate; and analyzing the FS sample to determine a composition of the FS, n the determined amount of additive is based at least in part upon the determined FS composition.

7. The method of claim 2, further comprising: obtaining a sample of the tion water; and analyzing the irrigation water sample to ine a composition of the irrigation water, wherein the determined amount of additive is based at least in part upon the determined irrigation water composition.

8. The method of claim 1, wherein the suction probe is positioned within the root activity zone.

9. The method of claim 1, wherein ining the nutrient utilization comprises determining a nitrogen utilization rate or a potassium utilization rate.

10. A method, comprising: installing a n probe at a depth within a soil substrate; inducing lic conduction of aqueous solutions from the soil substrate into the suction probe by drawing a vacuum on the suction probe; extracting an aqueous sample from the suction probe after applying the vacuum for a defined period of time; analyzing the aqueous sample to determine a chemical composition of the aqueous sample; determining concentrations of one or more marker ions at the depth of the soil substrate based upon the al composition of the aqueous sample, the one or more marker ions comprising chlorine (Cl–), sodium (Na+), or both; and determining nutrient utilization and a corrective measure of the soil substrate based at least in part upon the concentrations of the one or more marker ions.

11. The method of claim 10, further comprising applying the corrective measure to the soil substrate.

12. The method of claim 10, r comprising: installing a plurality of suction probes at multiple depths within the soil substrate; ng hydraulic conduction of s solutions from the soil substrate into the suction probe by drawing a vacuum on each of the plurality of suction probes; extracting aqueous samples from the plurality of suction probes after applying the vacuum to the plurality of suction probes for the defined period of time; analyzing the aqueous samples to determine chemical compositions of the aqueous samples, the chemical itions comprising concentrations of one or more marker ions, which are t at the ent depths.

13. The method of claim 12, wherein at least one of the plurality of suction probes is installed within a root activity zone of a plant species in the soil substrate.

14. The method of claim 10, wherein the corrective measure is r based at least in part upon electrical conductivity at the different depths of the soil substrate.

15. The method of claim 10, wherein the corrective measure is a g irrigation.

16. The method of claim 10, further comprising obtaining a plurality of soil samples at different depths of the root activity zone.

17. The method of claim 10, wherein the corrective measure comprises tion of the soil substrate.

18. The method of claim 17, wherein the irrigation comprises application of an additive to the soil substrate, the additive based at least in part upon the ined nutrient utilization.

19. The method of claim 10, further comprising determining that leaching is present in the soil substrate based at least in part upon the concentrations of the one or more marker ions, where the corrective measure addresses the leaching.