Compared with virtual UR (recommended using STP, but not applied) application of P in the same plots, only plot 1 received less fertilizer, while using on-the-go VR approach, whereas plots 3, 4 and 5 received more P. Although, Plot 2 received an identical rate compared with UR (30 kg ha-1), the fertilizer rate varied from 5 to 95 kg P ha-1 with the VR strategy (Table I).