Abstract
Recent studies have shown no yield responses of potato to phosphorus fertilizer application in the Miami-Dade County area. The objective of this trial was to evaluate the effects of reduced phosphorus fertilizer rates on potato yield and quality. The trial was conducted in a commercial potato field with a Biscayne marl soil with 3 rates of P fertilizer (0, 50 and 100% of grower rates). Phosphorous fertilizer application neither significantly increased AB-DTPA extractable P in the soil, nor affected the concentration of leaf P, yield and quality of potato.
