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Soil chemical sensor and precision agricultural chemical delivery system and method

  • US 5,033,397 A
  • Filed: 07/31/1990
  • Issued: 07/23/1991
  • Est. Priority Date: 07/31/1990
  • Status: Expired due to Fees
First Claim
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1. A method for sensing substantially instantaneously at least one chemical constituent of a soil while traversing a field of said soil and determining substantially simultaneously therewith an amount of corrective chemical to be added to said soil, comprising the steps of:

  • penetrating the soil of a first soil sample while traversing said sample;

    applying a solvent to said first soil sample to create a leachate while traversing said sample;

    applying a voltage differential across said leachate and determining a parameter proportional to said soil constituent while traversing said sample; and

    determining the amount of corrective chemical to be added to said sample while traversing said sample.

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