DYNAMIC MODELING, CONTROL AND VERIFICATION FOR CITRUS VARIABLE-RATE TECHNOLOGY (VRT) FERTILIZATIONPrecision farming also known as site specific crop management is a technology where the farmer takes into account the variability within a field to determine the optimal inputs for the crop in order to maximize the profitability through optimizing the use of fertilizers by Variable Rate Technology (VRT). This research provided the citrus growers of Florida a performance evaluation of all the commercial VRT fertilizer applicators available. The project