Ammonia volatilization characteristic of several secondary processing urea

Studies on the characteristic of ammonia volatilization in soil surface applied urea,compound fertilizer,coated urea and coated compound fertilizer by the enclosure method.The results indicated that ammonia volatilization characteristic of secondary processing urea were different:(1)9.2%,10.4%,7.6%,9.3% of total applied N were volatilized when urea,compound fertilizer,coated urea and coated compound fertilizer were applied.(2)The amount of...