Irrigation management zones


Variable rate irrigation


Soil moisture sensors


User dashboard Dynamic VRI testing results


The UGA dynamic VRI system has been tested for the past three years on peanut fields and for one year on corn and cotton. It is too soon to make assessments on the system’s performance with corn and cotton, but with peanuts, it has achieved irrigation water-use efficiency gains ranging from 16 to 40 percent and yield gains ranging from 2 to 4 percent. The research team is optimistic that similar gains in other crops will also be achieved.


End user


This graphic shows the process used by the University of Georgia dynamic VRI system. The dashboard allows the user to review and approve the irrigation recommendations created by the system for each irrigation management zone


before they are downloaded to the VRI controller. Photo credit: University of Georgia College of Agricultural and Environmental Sciences


Wesley Porter, PhD, is an assistant professor and extension precision ag and irrigation specialist at the University of Georgia. His research focus is in the precision ag and machinery systems field.


George Vellidis, PhD, is a professor in crop and soil sciences at the University of Georgia, where he has two areas of emphasis: water resources and precision agriculture.


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