Fertilizer source and placement influence ammonia volatilization losses from water‐seeded rice systems

Ammonia volatilization, a primary N loss pathway from rice ( Oryza sativa L.) production systems, leads to a reduction in N use efficiency and environmental problems. Ammonia volatilization has not been studied in water‐seeded rice systems or where aqueous NH 3 is the primary fertilizer N source. Our objective was to quantify NH 3 volatilization from preplant aqueous NH 3 and compare it with drilled or broadcast urea. In addition, NH 3...