Abstract
A series of four trials on a sodic field were conducted to evaluate the effect of various levels of ammonium sulphate on yield and quality of rice and wheat from 1986-87to 1987-88.The N was applied @ 0, 30,60,90, 120 and 0, 60, 120,180,240 kg ha-l alongwith a basal dose of P and K @ 50, 30 and-80, 50 kg ha-l for rice and wheat, respectively. It was found that grain and straw yield, number of productive tillers and NPK uptake by plants increased with increasing rates of N application. Maximum productive tillers and yield of rice was recorded at 90 kg N ha-l and of wheat with 180 N kg ha-l except wheat productive tillers during 1987-88. The NP uptake in rice and that of NPK in wheat were found maximum with 90 and 180 kg N ha-l ,respectively. The K uptake by rice was maximum at 120 kg N ha-l.
