Precision farming is defined as the art and science of utilizing advanced technologies for enhancing crop production while minimizing potential environmental pollution. Variable application rate apply different amounts of inputs in appropriate zones throughout a field. It aims in reduction of over¿application and under¿application of inputs, enhances productivity and profitability while reducing environmental impacts by better management of field variability. Variable rate application in equipment is to apply inputs at a precise time at right location, reduce seeding, spraying costs and good for environment