A crop input applicator system for controlling the application of crop
inputs from each dispensing point. The applicator is equipped with a
locating system and an on-board computer. The on-board computer uses
location data collected from the locating system, along with machine
signature data, and application maps to create status maps indicating the
area treated by crop inputs. The computer compares the status map to the
current location of the applicator and based on the comparison
automatically controls dispensing points so that those dispensing points
over an area previously treated are deactivated, while dispensing points
over an area not yet treated remain active.