Long-Term Phosphorus and Potassium Strategies in Irrigated Rice

By C. Witt, A. Dobermann, R. Buresh, S. Abdulrachman, H.C. Gines,R. Nagarajan, S. Ramanathan, P.S. Tan, and G.H. WangThe site-specific nutrient management (SSNM) approach for rice pro-vides sufficiently robust estimates of long-term fertilizer phosphorus(P) and potassium (K) requirements to avoid nutrient depletion. Addi-tional information from long-term experiments may be required to fine-tune fertilizer P and K recommendations developed on-farm.