Step 1: Identify and assess of variability in the farm plot through Grid Soil Sampling , and Crop Scouting . You can take help of technologies such as Global Positioning Satellite (GPS) and Remote Sensing . Or simply draw a map and note your results (dry and wet patches, stony or sandy patches, etc). Create a yield Map utilizing Yield Monitors or note your observations on the same map (strong plants or wilted plants; healthy or pest infested plants).
Step 2: 9 Feed the data into a computer based knowledge management and analysis database known as Geographic Information System (GIS). Or you can use your hand drawn map and mark the results of your observations.
Step 3: Using the computer generated data or your hand drawn map, apply the variable rate inputs with regard to precision fertilizer application , precision irrigation technology, and precision pest management. Monitor the yield(Yield monitoring) to know whether your decisions were correct or adjust the inputs suitably.