Farmers are continuously trying to avoid spray overlap of already sprayed sections of their field, as well as general over application of chemicals because it wastes money. Under application is also an issue. Skips and under treated areas in the field lead to increased weed pressure and weed resistance. 

Some farmers have tried solenoid valves for controlling spray activation and deactivation; but they can be problematic, as they can stick when heavier solutions are being sprayed. 

Precision Ag demands individual nozzle control as a necessary tool to further enhance your efficiency of chemical application.