Remotely sensed spectral image data are used to develop a Vegetation Index file which represents spatial variations of actual crop vigor throughout an area that is under cultivation. The latter information is processed to place it in a format that can be used by personnel to correlate and calibrate it...http://www.google.ca/patents/US7103451?utm_source=gb-gplus-sharePatent US7103451 - Method and system for spatially variable rate application of agricultural chemicals based on remotely sensed vegetation data
