![Calvin Perry, superintendent of the UGA CM Stripling Irrigation Research Park in Camilla, Ga., adjusts the controls of a variable-rate irrigation system. VRI uses computer maps, global positioning systems, soil sensors and software to control where and how much water the nozzles on a center pivot spray on crops. Perry and his colleagues recently added a 'push-button' feature to the system to make it easier for farmers to program.](https://secure.caes.uga.edu/news/multimedia/images/1501/CalvinPerryVRI-low-res.jpg)
Precision Agriculture
Auto-steer technology, variable rate irrigation, smart-phone apps — these are all precision farming techniques that University of Georgia professor George Vellidis believes farmers should be using in their day-to-day operations.