The objective of this study was to evaluate dry matter (DM) production Urochloa brizantha cv. Marandu and ammonia volatilization in response rates sources enhanced-efficiency N fertilizers. experiment took place a pasture area, two growing seasons. A randomized block design with four replications used, 4 × 2 + 1 factorial arrangement, consisting (Urea—UrConv; Ammonium nitrate—AN; Urea NBPT—UrNB...

Agrotain has shown in previous studies on silt loam soils to be much less prone to ammonia volatilization loss and to result in higher rice-grain yields compared to urea when the flood cannot be applied immediately after nitrogen (N) fertilizer application. However, no research has been conducted to determine if Agrotain is superior to urea as an N source for rice grown on clay soils, which vol...

A spatially-explicit, two-dimensional model was developed to evaluate the processes which determine the fate and transport of nitrogen (N) in wetland systems. The wetland soil profile was partitioned into floodwater, and aerobic, and anaerobic soil layers, with diffusion and settling accounting for the transport of N between layers. Nitrogen transformations considered in the model were; enzyme ...