RESPONSE OF DIFFERENT SULPHUR SOURCES AND LEVELS ON NUTRIENT CONTENT, ITS UPTAKE, NUTRIENT USE EFFICIENCY AND THE AVAILABILITY OF SULPHUR IN POST-HARVEST SOILS OF GREEN GRAM

A field experiment was carried out in the Kharif season of 2021, at soil science research farm of Lovely professional university (Punjab), to assess the effects of various sulphur sources and levels on the nutrient content, uptake, Nutrient use efficiency and the sulphur availability in post-harvest soil of green gram ( Vigna radiata L.Wilczek) crop. The experiment was laid out in a factorial randomized block design, comprising of three sulphur sources (Gypsum, Single Super Phosphate and Bentonite sulphur), four levels (0, 10, 20 and 30 kg/ha) and replicated thrice. The results of the study revealed that the higher sulphur content and its uptake in leaf, shoot, grain, and straw yield were obtained with gypsum application at 20 kg S/ha. Moreover, statistically significant increase in Sulphur use efficiency and Agronomic use efficiency of green gram were recorded with the application of gypsum @ 20 kg S/ha respectively over control. However, the sulphur availability in soil after harvest, was maximum with the sulphur application of 30 kg/ha through bentonite sulphur. Therefore, gypsum application at the dosage of 20 kg/ha along with the Recommended dose of NPK, gave productive results with respect to green gram crop.