Influence of Field Environment and Fertilizer Management on Ammonia Loss from Flooded Rice

摘要: The importance of ammonia volatilization after urea application to flooded rice (Oryza sativa L.) was assessed in six experiments at two field locations in the Philippines, using a nondisturbing micrometeorological technique. Earlier studies had produced conflicting results probably because the techniques used did not conserve the balance of physical, chemical, and biological processes that affect ammonia loss in this ecosystem. Urea was either broadcast and incorporated immediately before transplanting of rice seedlings (BI …