Ammonia Volatilization as Affected by Methods of Fertilization

Ammonia volatilization from ammoniacal fertilizers were initially more than that from ammonia forming fertilizer like urea. Application of fertilizer N on wet soil surface accelerates ammonia loss, but it can be reduced by incorporating into soil and further substantially be reduced by dry soil application followed by irrigation. Lowest amount of loss was observed in diammonium phosphate followed by ammonium chloride. Compaction of NH₄Cl and DAP separately with urea reduced the loss when they were applied on wet soil surface or incorporated into soil.