Remotely sensed spectral image data are used to develop a Vegetation Index file which represents spatial variations of actual crop vigor throughout a field that is under cultivation. The latter information is processed to place it in a format that can be used by farm personnel to correlate and calibrate...http://www.google.ca/patents/US20040034450?utm_source=gb-gplus-sharePatent US20040034450 - Method and apparatus for spatially variable rate application of agricultural chemicals based on remotely sensed vegetation data
