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WO2009066990A2 - Apparatus for soil nutrient analysis - Google Patents

Apparatus for soil nutrient analysis Download PDF

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Publication number
WO2009066990A2
WO2009066990A2 PCT/MY2008/000156 MY2008000156W WO2009066990A2 WO 2009066990 A2 WO2009066990 A2 WO 2009066990A2 MY 2008000156 W MY2008000156 W MY 2008000156W WO 2009066990 A2 WO2009066990 A2 WO 2009066990A2
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WO
WIPO (PCT)
Prior art keywords
soil nutrient
sensor cell
spray nozzle
analyzing
designed
Prior art date
Application number
PCT/MY2008/000156
Other languages
French (fr)
Other versions
WO2009066990A3 (en
Inventor
Mohd Rais Ahmad
Rahimah Mohod Saman
Khairil Mazwan Mohd Zaini
Original Assignee
Mimos Berhad
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mimos Berhad filed Critical Mimos Berhad
Publication of WO2009066990A2 publication Critical patent/WO2009066990A2/en
Publication of WO2009066990A3 publication Critical patent/WO2009066990A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials
    • G01N33/245—Earth materials for agricultural purposes

Definitions

  • the present invention relates to the use of an apparatus for soil nutrient analysis.
  • soil samples taken from the field are tested in a laboratory to determine levels of nutrient in the soil.
  • Ionic nutrient of interest includes nitrate, nitrite, phosphate, phosphite, and potassium.
  • the laboratory tests require multi-step analytical procedures for determining nutrient levels. Based on the results, fertilizers are applied uniformly across the field without considering local variations in soil nutrient composition.
  • Conventional agricultural equipment is designed to apply chemicals, fertilizers and plant crops at uniform rates within a field, regardless of changes in soil type, soil nutrient and organic matter content. This can result in an over application of chemicals and fertilizers in some areas of the field, an under application in other areas, over planting in some areas and under planting in others. It would therefore be desirable to provide a prescription application system which would rapidly and accurately adjust chemical, fertilizer and seedling rates by sensing variations in soil type, soil nutrient and organic matter as equipment traverses a field.
  • Standard methods of soil analysis include the use of a system for analyzing soil nutrient using ion-sensitive field effect transistor (ISFET) sensors where the sensing cell is bored underground, hi this configuration the soil is moisturized followed by in-situ detection of ionic species via ion-selective membranes.
  • the bored cell may have a disadvantage in terms of reliability due to direct contact of the ion-selective membrane with soil. The problem is even more serious in clay or hard and dense soil where the tendency for soil to get stuck to the membrane is higher, hi the present invention, a rod shape apparatus which function as a plunger body is designed to bore into the soil.
  • the present apparatus comprises a moveable gate (3) which control the entry of soil to be in contact with the sensor cell (4).
  • This invention may reduce the duration of soil in continuous direct contact to the sensor cell (4) which subsequently reduce the tendency of soil to get stuck and attached to the sensor cell (4).
  • the present apparatus further comprises a spray nozzle (1) which is designed for spraying of extractant liquid to the soil. Hence, the moisture of soil can be monitored.
  • This invention may reduce the duration of soil hi continuous direct contact to the sensor cell (4) and also reduce the tendency of dense soil to get stuck and attached to the sensor cell (4).
  • United States granted patent No. 5,010,776 discloses a method and system for detecting environmental contamination, such as subsurface contamination, with a test probe located in a medium.
  • the probe is adapted to collect a fluid sample from the medium for deterrnining the presence of contaminants having a vapor pressure.
  • Pneumatic communication lines extend from a test point and connect to the probe.
  • a detector/analyzer is connected to the distal end of the communication lines of the probe. While connected, a fluid sample is taken into the probe and transported hi the pneumatic communication lines by a carrier gas to the detector/analyzer for analysis of the contaminants.
  • the general principle is applicable for contaminant detection and/or analysis in soil masses, liquid masses and gases.
  • US 6,353,323 Bl discloses an apparatus for, and a method of, simultaneously measuring the concentration of a selected ion species in a solution and the pH of the solution, uses an ion selective electrode, a reference electrode and an ISFET immersed in the solution.
  • the ion concentration is determined in a first circuit from the potential difference between the ion selective electrode and the reference electrode
  • the pH is determined in a second circuit from the current flowing between the ISFET and the reference electrode.
  • the reference electrode is connected into the second circuit so as to isolate the two circuits from each other.
  • the earth potential of the solution is connected to provide the earth potential of the first circuit, and is connected to the second circuit via a high capacitance so as to provide a virtual earth therefore.
  • Each circuit is supplied with a separate power source, and the circuit outputs are supplied via respective isolation amplifiers to a multi-channel meter.
  • United States granted patent No. US 6,487,920 Bl discloses an improved in situ penetrometer probe and to a heated, flexible transfer line.
  • the line and probe may be implemented together in a penetrometer system in which the transfer line is used to connect the probe to a collector/analyzer at the surface.
  • the probe comprises a heater that controls the temperature of a geologic medium surrounding the probe.
  • At least one carrier gas port and vapor collection port are located on an external side wall of the probe.
  • the carrier gas port provides a carrier gas into the geologic medium, and the collection port captures vapors from the geologic medium for analysis.
  • a flexible collection line that conveys a collected fluid, i.e., vapor, sample to a collector/analyzer.
  • a flexible carrier gas line conveys a carrier gas to facilitate the collection of the sample.
  • a system heating the collection line is also provided.
  • the collection line is electrically conductive so that an electrical power source can generate a current through it so that the internal resistance generates heat
  • United States granted patent No. US 6,624,637 Bl discloses a device for measuring the concentration of ions, notably of hydrogen ions, in a measuring liquid using at least one ion-sensitive field effect transistor which is integrated into an electric circuit within the device in such a way that said circuit emits an output signal which serves as measure of the ion concentration in the measuring liquid.
  • the invention provides for the at least one pH-ISFET to be bridge-connected with at least three resistors.
  • the present invention relates to the use of an apparatus for moisturizing soil and analyzing soil nutrient.
  • the apparatus comprising of spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell, electronics connection system (5), extractant supply (6), pressure regulator (7) and/or analyzer (8).
  • the spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4) and electronics connection system (5) are incorporated in a rod (9).
  • the rod (9) is designed to bore into the soil and function as a plunger body.
  • the spray nozzle (1) is positioned on top of the soil surface and the sensor cell (4) and is designed to spray out extractant liquid to moisture the soil for soil nutrient analysis.
  • the spray nozzle (1) is adjustable wherein the height of the spray nozzle (1) from the soil surface can be adjusted to accommodate different soil types.
  • the spray nozzle (1) is connected to the extractant supply (6) and pressure regulator (7) via polymer tubing (2), preferably teflon tubing.
  • the moveable gate (3) is designed to open or close manually and/or automatically which allow the entry of soil into the rod (9) and in contact with the sensor cell (4).
  • the sensor cell (4) is designed to detect and measure the soil nutrient.
  • the sensor cell (4) preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell is positioned at its tilt angle, at the entrance of the moveable gate (3) and under the spray nozzle (1).
  • the electronics connection system (5) is designed to connect the sensor cell (4) to the analyzer (8).
  • the extractant supply (6) is designed for supplying extractant liquid to the spray nozzle (1).
  • the pressure regulator (7) is designed for regulating the pressure of extractant liquid. Both extractant supply (6) and pressure regulator (7) are connected to the spray nozzle (1) wherein the volume, interval and/or pressure of the extractant liquid can be monitored accordingly.
  • the analyzer (8) is designed for analyzing the types, quantity and/or quality of soil nutrient.
  • Figure 1 illustrates the main components of the apparatus for analyzing soil nutrient.
  • the present invention relates to the use of an apparatus for moisturizing soil and analyzing soil nutrient.
  • An apparatus for analyzing soil nutrient comprising spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4), electronics connection system (5), extractant supply (6), pressure regulator (7) and/or analyzer (8).
  • the spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4) and electronics connection system (5) are incorporated in a rod (9).
  • the rod (9) is designed to work as a plunger body and is designed to bore into the soil for a long period of time.
  • the rod (9) consists of a moveable gate (3) which is situated at the surface of the rod (9).
  • the moveable gate (3) is designed to open or close which allow the entry of soil into the rod (9) and in contact with the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell.
  • the ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell (4) is located at its tilt angle and at the entrance of the moveable gate (3).
  • the spray nozzle (1) is located on top of the ion- sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell (4) wherein the spray nozzle (1) will spray out extractant liquid to moisture the soil.
  • Soil nutrient will be dissolved in the extractant liquid and the soil nutrient solution will be detected by the ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell (4) which placed at the bottom. Electrical nodes will be produced and it will be processed and analyzed by receive output integranted circuit (ROIC) and analyzer (8).
  • ISFET ion-sensitive field effect transistor
  • ISE ion-selective electrode
  • the spray nozzle (1) is designed to spray out extractant liquid to moisture the soil.
  • the spray nozzle (1) is optimally positioned on top of the soil surface and the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell.
  • ISFET ion-sensitive field effect transistor
  • ISE ion-selective electrode
  • the spray apparatus is permanently placed in the soil at a designated location for regular on-site analysis of soil nutrient. The height of the spray nozzle (1) from the soil surface can be adjusted to accommodate different soil types.
  • the polymer tubing (2) is designed to connect the spray nozzle (1 ) to the extractant supply (6) and pressure regulator (7).
  • the polymer tubing (2) is made of polymer, preferably teflon.
  • the moveable gate (3) is designed to open or close manually and/or automatically which allow the entry of soil into the rod (9) and in contact with the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell.
  • the moveable gate (3) is situated at the surface of the rod (9).
  • the sensor cell (4) preferably ion-sensitive field effect transistor (ISFET) or ion- selective electrode (ISE) sensor cell is positioned at its tilt angle, at the entrance of the moveable gate (3) and under the spray nozzle (1).
  • the sensor cell (4) is designed to detect and measure the soil nutrient.
  • the sensor cell (4) is positioned at its tilt angle which maximizes and optimizes the contact of the soil solution with the surface of the sensor cell (4) to enable better and quality detection and measurement of soil nutrient.
  • the electronics connection system (5) is designed to connect the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell to the analyzer (8) wherein the types, quantity and/or quality of the soil nutrient will be detected, measured and analyzed.
  • ISFET ion-sensitive field effect transistor
  • ISE ion-selective electrode
  • the extractant supply (6) is designed to supply the extractant liquid to the spray nozzle (1) for spraying out extractant liquid to moisture the soil.
  • the extractant supply (6) is connected to the spray nozzle (1) via the polymer tubing (2).
  • the pressure regulator (7) is designed to regulate the extractant liquid wherein the volume, interval and/or pressure of the extractant liquid can be monitor accordingly.
  • the pressure regulator (7) is connected to the spray nozzle (1) via the polymer tubing (2).
  • the analyzer (8) is designed to analyze the soil nutrient wherein the results detected and measured by the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell will be analyzed.
  • ISFET ion-sensitive field effect transistor
  • ISE ion-selective electrode

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Analytical Chemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The present invention relates to the use of an apparatus for moisturizing soil and analyzing soil nutrient. The apparatus comprising of spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell, electronics connection system (5), extractant supply (6), pressure regulator (7) and/or analyzer (8).

Description

APPARATUS FOR SOIL NUTRIENT ANALYSIS
Field of the Invention
The present invention relates to the use of an apparatus for soil nutrient analysis.
Background of the Invention and Prior Art
In farming, knowledge of a field's soil nutrient needs prior to application of fertilizers makes it possible to enhance crop yield. Nutrient needs within a farming field vary depending on the soil conditions and nature of the crops. Agricultural farming based on immediate soil needs to increase the efficiency of the amounts of fertilizers used, thereby reducing the excessive and unnecessary use of fertilizers resulting in environmental pollution.
Traditionally, soil samples taken from the field (typically one sample per hectare) are tested in a laboratory to determine levels of nutrient in the soil. Ionic nutrient of interest includes nitrate, nitrite, phosphate, phosphite, and potassium. The laboratory tests require multi-step analytical procedures for determining nutrient levels. Based on the results, fertilizers are applied uniformly across the field without considering local variations in soil nutrient composition.
Conventional agricultural equipment is designed to apply chemicals, fertilizers and plant crops at uniform rates within a field, regardless of changes in soil type, soil nutrient and organic matter content. This can result in an over application of chemicals and fertilizers in some areas of the field, an under application in other areas, over planting in some areas and under planting in others. It would therefore be desirable to provide a prescription application system which would rapidly and accurately adjust chemical, fertilizer and seedling rates by sensing variations in soil type, soil nutrient and organic matter as equipment traverses a field. There is thus a need for an apparatus that will sense the nutrient and organic content of soil as chemicals and fertilizers are being applied or crops planted so that the application of the chemicals, fertilizers and the seedling can be adjusted based upon the sensed organic matter content of the particular area of the field to be treated or planted.
Standard methods of soil analysis include the use of a system for analyzing soil nutrient using ion-sensitive field effect transistor (ISFET) sensors where the sensing cell is bored underground, hi this configuration the soil is moisturized followed by in-situ detection of ionic species via ion-selective membranes. The bored cell may have a disadvantage in terms of reliability due to direct contact of the ion-selective membrane with soil. The problem is even more serious in clay or hard and dense soil where the tendency for soil to get stuck to the membrane is higher, hi the present invention, a rod shape apparatus which function as a plunger body is designed to bore into the soil. The present apparatus comprises a moveable gate (3) which control the entry of soil to be in contact with the sensor cell (4). This invention may reduce the duration of soil in continuous direct contact to the sensor cell (4) which subsequently reduce the tendency of soil to get stuck and attached to the sensor cell (4). The present apparatus further comprises a spray nozzle (1) which is designed for spraying of extractant liquid to the soil. Hence, the moisture of soil can be monitored. This invention may reduce the duration of soil hi continuous direct contact to the sensor cell (4) and also reduce the tendency of dense soil to get stuck and attached to the sensor cell (4).
United States granted patent No. 5,010,776 discloses a method and system for detecting environmental contamination, such as subsurface contamination, with a test probe located in a medium. The probe is adapted to collect a fluid sample from the medium for deterrnining the presence of contaminants having a vapor pressure. Pneumatic communication lines extend from a test point and connect to the probe. A detector/analyzer is connected to the distal end of the communication lines of the probe. While connected, a fluid sample is taken into the probe and transported hi the pneumatic communication lines by a carrier gas to the detector/analyzer for analysis of the contaminants. The general principle is applicable for contaminant detection and/or analysis in soil masses, liquid masses and gases. United States granted patent No. US 6,353,323 Bl discloses an apparatus for, and a method of, simultaneously measuring the concentration of a selected ion species in a solution and the pH of the solution, uses an ion selective electrode, a reference electrode and an ISFET immersed in the solution. The ion concentration is determined in a first circuit from the potential difference between the ion selective electrode and the reference electrode, and the pH is determined in a second circuit from the current flowing between the ISFET and the reference electrode. The reference electrode is connected into the second circuit so as to isolate the two circuits from each other. The earth potential of the solution is connected to provide the earth potential of the first circuit, and is connected to the second circuit via a high capacitance so as to provide a virtual earth therefore. Each circuit is supplied with a separate power source, and the circuit outputs are supplied via respective isolation amplifiers to a multi-channel meter.
United States granted patent No. US 6,487,920 Bl discloses an improved in situ penetrometer probe and to a heated, flexible transfer line. The line and probe may be implemented together in a penetrometer system in which the transfer line is used to connect the probe to a collector/analyzer at the surface. The probe comprises a heater that controls the temperature of a geologic medium surrounding the probe. At least one carrier gas port and vapor collection port are located on an external side wall of the probe. The carrier gas port provides a carrier gas into the geologic medium, and the collection port captures vapors from the geologic medium for analysis. In the transfer line, a flexible collection line that conveys a collected fluid, i.e., vapor, sample to a collector/analyzer. A flexible carrier gas line conveys a carrier gas to facilitate the collection of the sample. A system heating the collection line is also provided. Preferably the collection line is electrically conductive so that an electrical power source can generate a current through it so that the internal resistance generates heat.
United States granted patent No. US 6,624,637 Bl discloses a device for measuring the concentration of ions, notably of hydrogen ions, in a measuring liquid using at least one ion-sensitive field effect transistor which is integrated into an electric circuit within the device in such a way that said circuit emits an output signal which serves as measure of the ion concentration in the measuring liquid. To provide a circuit which is as simple as possible and in particular comprises as few components as possible, the invention provides for the at least one pH-ISFET to be bridge-connected with at least three resistors.
International patent application No. PCT/US97/07501 discloses a soil nutrient sensor comprising a capillary, buffer source reservoir, buffer drain reservoir, high- voltage power source, electrical conductors, detector assembly, computer, microinfusion pump, injection loop, interface junction, soil probe, buffer reservoir, and samples of standard reference solutions.
International patent application No. PCT/CH2003/000531 discloses a method for analyzing the soil, in which a borehole is drilled in order to take a measurement and/or a sample of the soil, a gas, and/or a liquid. The borehole is furnished with a pipe, the wall of which comprises at least one area that is easy to pierce, before the measurement or the sample of the soil and/or liquid is taken. The area that is easy to pierce is penetrated by means of a measuring probe and/or sample probe in order to take the measurement and the sample of the soil, gas, or liquid.
Summary of the Invention
The present invention relates to the use of an apparatus for moisturizing soil and analyzing soil nutrient. The apparatus comprising of spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell, electronics connection system (5), extractant supply (6), pressure regulator (7) and/or analyzer (8). The spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4) and electronics connection system (5) are incorporated in a rod (9). The rod (9) is designed to bore into the soil and function as a plunger body. The spray nozzle (1) is positioned on top of the soil surface and the sensor cell (4) and is designed to spray out extractant liquid to moisture the soil for soil nutrient analysis. The spray nozzle (1) is adjustable wherein the height of the spray nozzle (1) from the soil surface can be adjusted to accommodate different soil types. The spray nozzle (1) is connected to the extractant supply (6) and pressure regulator (7) via polymer tubing (2), preferably teflon tubing. The moveable gate (3) is designed to open or close manually and/or automatically which allow the entry of soil into the rod (9) and in contact with the sensor cell (4). The sensor cell (4) is designed to detect and measure the soil nutrient. The sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell is positioned at its tilt angle, at the entrance of the moveable gate (3) and under the spray nozzle (1). The electronics connection system (5) is designed to connect the sensor cell (4) to the analyzer (8). The extractant supply (6) is designed for supplying extractant liquid to the spray nozzle (1). The pressure regulator (7) is designed for regulating the pressure of extractant liquid. Both extractant supply (6) and pressure regulator (7) are connected to the spray nozzle (1) wherein the volume, interval and/or pressure of the extractant liquid can be monitored accordingly. The analyzer (8) is designed for analyzing the types, quantity and/or quality of soil nutrient.
Brief Description of the Drawings
Figure 1 illustrates the main components of the apparatus for analyzing soil nutrient.
Detailed Description of the Invention
The present invention relates to the use of an apparatus for moisturizing soil and analyzing soil nutrient. An apparatus for analyzing soil nutrient comprising spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4), electronics connection system (5), extractant supply (6), pressure regulator (7) and/or analyzer (8). The spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4) and electronics connection system (5) are incorporated in a rod (9). The rod (9) is designed to work as a plunger body and is designed to bore into the soil for a long period of time. The rod (9) consists of a moveable gate (3) which is situated at the surface of the rod (9). The moveable gate (3) is designed to open or close which allow the entry of soil into the rod (9) and in contact with the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell. The ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell (4) is located at its tilt angle and at the entrance of the moveable gate (3). The spray nozzle (1) is located on top of the ion- sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell (4) wherein the spray nozzle (1) will spray out extractant liquid to moisture the soil. Soil nutrient will be dissolved in the extractant liquid and the soil nutrient solution will be detected by the ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell (4) which placed at the bottom. Electrical nodes will be produced and it will be processed and analyzed by receive output integranted circuit (ROIC) and analyzer (8).
The spray nozzle (1) is designed to spray out extractant liquid to moisture the soil. The spray nozzle (1) is optimally positioned on top of the soil surface and the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell. The spray apparatus is permanently placed in the soil at a designated location for regular on-site analysis of soil nutrient. The height of the spray nozzle (1) from the soil surface can be adjusted to accommodate different soil types.
The polymer tubing (2) is designed to connect the spray nozzle (1 ) to the extractant supply (6) and pressure regulator (7). The polymer tubing (2) is made of polymer, preferably teflon.
The moveable gate (3) is designed to open or close manually and/or automatically which allow the entry of soil into the rod (9) and in contact with the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell. The moveable gate (3) is situated at the surface of the rod (9).
The sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion- selective electrode (ISE) sensor cell is positioned at its tilt angle, at the entrance of the moveable gate (3) and under the spray nozzle (1). The sensor cell (4) is designed to detect and measure the soil nutrient. The sensor cell (4) is positioned at its tilt angle which maximizes and optimizes the contact of the soil solution with the surface of the sensor cell (4) to enable better and quality detection and measurement of soil nutrient.
The electronics connection system (5) is designed to connect the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell to the analyzer (8) wherein the types, quantity and/or quality of the soil nutrient will be detected, measured and analyzed.
The extractant supply (6) is designed to supply the extractant liquid to the spray nozzle (1) for spraying out extractant liquid to moisture the soil. The extractant supply (6) is connected to the spray nozzle (1) via the polymer tubing (2).
The pressure regulator (7) is designed to regulate the extractant liquid wherein the volume, interval and/or pressure of the extractant liquid can be monitor accordingly. The pressure regulator (7) is connected to the spray nozzle (1) via the polymer tubing (2).
The analyzer (8) is designed to analyze the soil nutrient wherein the results detected and measured by the sensor cell (4), preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell will be analyzed.

Claims

Claims
1. An apparatus for analyzing soil nutrient comprising:
- a spray nozzle (1);
- a polymer tubing (2); - a moveable gate (3);
- a sensor cell (4);
- an electronics connection system (5);
- an extractant supply (6);
- a pressure regulator (7); and/or - an analyzer (8).
2. The apparatus for analyzing soil nutrient according to claim 1 wherein the spray nozzle (1), polymer tubing (2), moveable gate (3), sensor cell (4) and electronics connection system (5) are incorporated in a rod (9).
3. The rod (9) according to claim 2 is designed to bore into the soil.
4. The rod (9) according to claim 2 which functions as a plunger body.
5. The apparatus for analyzing soil nutrient according to claim 1 wherein the spray nozzle (1) is positioned on top of the soil surface and the sensor cell (4).
6. The apparatus for analyzing soil nutrient according to claim 1 wherein the spray nozzle (1) is designed for spraying out extractant liquid.
7. The apparatus for analyzing soil nutrient according to claim 1 wherein the spray nozzle (1) is connected to extractant supply (6) and pressure regulator (7) via polymer tubing (2).
8. The apparatus for analyzing soil nutrient according to claim 1 wherein the spray nozzle (1) is adjustable.
9. The spray nozzle (1) according to claim 8 wherein the height of the spray nozzle (1) can be adjusted to accommodate different soil types.
10. The apparatus for analyzing soil nutrient according to claim 1 wherein the polymer tubing (2) is connected to the extractant supply (6) and pressure regulator (7).
11. The apparatus for analyzing soil nutrient according to claim 1 wherein the polymer tubing (2) is made of teflon.
12. The apparatus for analyzing soil nutrient according to claim 1 wherein the moveable gate (3) is designed to open or close manually and/or automatically.
13. The apparatus for analyzing soil nutrient according to claim 1 wherein the moveable gate (3) is designed for allowing the entry of soil into the rod (9) and in contact with the sensor cell (4).
14. The apparatus for analyzing soil nutrient according to claim 1 wherein the sensor cell (4) is preferably ion-sensitive field effect transistor (ISFET) or ion-selective electrode (ISE) sensor cell.
15. The apparatus for analyzing soil nutrient according to claim 1 wherein the sensor cell (4) is positioned at a tilt angle, at the entrance of the moveable gate (3) and under the spray nozzle (1).
16. The apparatus for analyzing soil nutrient according to claim 1 wherein the sensor cell (4) is designed for detecting and measuring of soil nutrient.
17. The apparatus for analyzing soil nutrient according to claim 1 wherein the electronics connection system (5) is designed for connecting the sensor cell (4) to the analyzer (8).
18. The apparatus for analyzing soil nutrient according to claim 1 wherein the extractant supply (6) is designed for supplying extractant liquid to the spray nozzle (1).
19. The apparatus for analyzing soil nutrient according to claim 1 wherein the pressure regulator (7) is designed for regulating the pressure of extractant liquid.
20. The apparatus for analyzing soil nutrient according to claim 1 wherein the analyzer (8) and receive output integrated circuit are designed for analyzing the types, quantity and/or quality of soil nutrient.
PCT/MY2008/000156 2007-11-22 2008-11-24 Apparatus for soil nutrient analysis WO2009066990A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20072072A MY144987A (en) 2007-11-22 2007-11-22 Apparatus for soil nutrient analysis
MYPI20072072 2007-11-22

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WO2009066990A3 WO2009066990A3 (en) 2009-08-20

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103091276A (en) * 2011-11-03 2013-05-08 中国科学院合肥物质科学研究院 Soil nutrient sensor
CN104215672A (en) * 2014-08-20 2014-12-17 北京农业信息技术研究中心 Rapid soil nutrient detection method
CN109725024A (en) * 2017-10-27 2019-05-07 拉碧斯半导体株式会社 Measuring device

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US5526705A (en) * 1994-08-05 1996-06-18 Tyler Limited Partnership Automated work station for analyzing soil samples
JPH1014402A (en) * 1996-06-28 1998-01-20 Sanyo Electric Works Ltd Soil nutrient measuring instrument

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103091276A (en) * 2011-11-03 2013-05-08 中国科学院合肥物质科学研究院 Soil nutrient sensor
CN104215672A (en) * 2014-08-20 2014-12-17 北京农业信息技术研究中心 Rapid soil nutrient detection method
CN109725024A (en) * 2017-10-27 2019-05-07 拉碧斯半导体株式会社 Measuring device
CN109725024B (en) * 2017-10-27 2023-04-28 拉碧斯半导体株式会社 Measuring device

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