> GPS is becoming quite common on the large flat fields of Illinois... Here are the estimates of the deployment of GPS devices for "automatic yield mapping" (giving mass/area, "point-by-point") in the fields of Champaign County, Illinois: 30%, by the "Precision Agriculture" group in the Dept. of Agr. Engr., and 40%, by the County Farm Bureau which gave the names of three farmers willing to provide details of their particular operations. "Variable Rate Fertilization" is an option, but is not yet so widely in use as the systems for automatic yield mapping. Gene.
