G - Physics – 01 – N
Patent
G - Physics
01
N
324/23
G01N 33/24 (2006.01) A01B 79/00 (2006.01) A01C 21/00 (2006.01) A01C 23/00 (2006.01) A01C 23/02 (2006.01) A01M 7/00 (2006.01) G01N 27/04 (2006.01)
Patent
CA 1314071
ABSTRACT OF THE INVENTION A real time soil chemical sensor and precision agricul- tural chemical delivery system includes a plurality of ground- engaging tools in association with individual soil sensors which measure soil chemical levels. The system includes the addition of a solvent which rapidly saturates the soil/tool interface to form a conductive solution of chemicals leached from the soil. A multivalent electrode, positioned within a multivalent frame of the ground-engaging tool, applies a voltage or impresses a current between the electrode and the tool frame. A real-time soil chemical sensor and controller senses the electrochemical reaction resulting from the appli- cation of the voltage or current to the leachate, measures it by resitivity methods, and compares it against pre-set resis- tivity levels for substances leached by the solvent. Still greater precision is obtained by calibrating for the secondary current impressed through solvent-less soil. The appropriate concentration is then found and the servo-controlled delivery system applies the appropriate amount of fertilizer or agri- cultural chemicals substantially in the location from which the soil measurement was taken.
592340
Aguila Corporation
Borden Ladner Gervais Llp
Colburn John W. Jr.
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