Efficiency of N-(n-butyl) thiophosphoric triamide in retarding hydrolysis of urea and ammonia volatilization losses in a flooded sandy loam soil amended with organic materials

abonos verdes ammonia ammoniac azote engrais vert green manures hydrolyse hydrolysis inhibidores de la ureasa loam soils losses nitrogen oryza paja de trigo perte sandy soils sol sableux sol sablolimoneux suelo arenoso suelo franco triticum urea urease inhibitors uree volatilidad volatility wheat straw