A Study on the Suitability of Nitrogenous and Phosphatic Fertilizers for Wheat Crop Grown on Salt-Affected Soils

Pot-culture studies on the suitability of nitrogenous and phosphatic fertilizers for wheat crop grown on nine salt-affected soils showed that on soils of low salinity (ECe up to 4.6 mmhos/cm) all the nitrogenous fertilizers viz, ammonium sulphate, calcium ammonium nitrate, urea and potassium nitrate were found to be equally suitable but at higher levels of salinity (ECe up to 9.5 mmhos/cm), nitrate form of nitrogen was better than others. In general, on sodic soils, ammoniacal and nitrate form of nitrogen resulted in better yields than others. Nitrate and ammoniacal nitrate form of nitrogen proved more effective than others on saline-sodic soils. Out of different phosphatic fertilizers, triple superphosphate and superphosphate were found to be suitable for saline soils, diammonium phosphate for all the types of sodic soils and diammonium phosphate and triple superphosphate for saline-sodic soils.