Variable rate irrigation (VRI) enables center pivot management to better meet non-uniform water and fertility needs. This is accomplished through correctly matching system water application with spatial and temporal variability within the field. A computer program was modified to accommodate GIS data layers of grid-based field soil texture properties and fertility needs in making management decisions. The program can automatically develop a variable rate application prescription along the lateral for the entire field based on soil texture, slope, water, and crop chemigation needs, with the goal to improve production while making better use of water and fertilizer. Prescriptions could be developed for VRI using individual sprinkler control, defined sprinkler zones, or system rotation speed changes. Results are presented for a specific field showing: 1) automatic determination of the maximum application depth based on each respective application rate along the lateral matched to the soil intake rate at each position; and 2) the corresponding prescription maps for variable rate chemigation for three types of VRI control. The program outputs management prescriptions in both text format and graphically to enable growers to visually assess the results. Future work will be directed at converting management prescriptions into a format directly usable by pivot control panels.