US Patent 9585307 Optical real-time soil sensor and auto-calibration methods

A method for application of an agricultural product to a field, the method includes acquiring real-time sampled data using real-time agricultural sensors, wherein the real-time agricultural sensors include a soil sensor, auto-calibrating the real-time agricultural sensors using statistical characteristics of the real-time sampled data to determine an application rate, and applying the agricultural product to the field based on the application rate.