Abstract
A field experiment was. conducted at the National Agricultural Research Centre to find out the most efficient source of N for wheat under different irrigation regimes. Ammonium nitrate, sulphur-coated urea and prilled urea were applied @ 150 kg N ha-1 . Irrigations were applied at 25% less than ET, equal to ET and at 50% more of ET. Ammonium nitrate and SCU were proved better than urea for grain and straw yields, N uptake, N recovery and agronomic efficiency. The irrigation regime of 12 was the best treatment. No NOrN leaching losses were evident under II and 12 irrigation treatments, but the chances of leaching were more under 13 treatment.
