The experiment comprising of three levels of sulphur i.e. 15, 30 and 45 kg S ha-1 experiment was conducted during kharif 2019 at the Agricultural Research Farm, College of Agriculture, BUAT, Banda UP. Total eight treatments were laid out in randomized block design with three replications. The investigation was aimed to study the effect of different sulphur levels from two sources viz. elemental sulphur and SSP, on plant height, nodule plant-1, yields, NPKS contents and uptake, SUE, soil physio-chemical properties and seed quality as protein in black gram cv Azad-3.The results revealed that T8 treatment (45 kg S ha-1 through SSP ) was significantly superior over other treatments in plant height, nodule plant-1, pods plant-1,seed pod-1,seed , straw and biological yield except T5 treatment (45 kg S ha-1 through elemental sulphur ).The maximum harvest index (29.0%) was found in T8 followed by T5 (28.8 %) and lowest at T1 (28.1%). Content and uptake of NPKS in seed and straw of black gram influenced due to application of different treatments up to highest dose of sulphur application (45 kg S ha-1) in T5 and T8 treatments. Treatment T8 was significantly superior in content and uptake of nutrients (NPKS) over other treatments but it was at par with treatment T5. The maximum seed, straw and biological yield was recorded 756 kg ha-1, 1855 kg ha-1 and 2611 kg ha-1, respectively in treatment T8, followed by T5 treatment 714 kg ha-1, 1766 kg ha-1 and 2480 kg ha1, respectively. T8 and T5 treatments were significantly gave higher yields over control and found best treatments. Maximum protein content (21.56 g) was recorded in T8 followed by T5 (21.25 g).SSP had pronounced effect on protein content as compared to elemental sulphur with different doses of sulphur application. Economically treatment T8 was also best treatment followed by T5 and it is evident from the data presented herein. Cost: Benefit ratio was equal in both the treatments T8 and T5. SUE was obtained highest (12.66) at T6 (15 kg S ha-1) with SSP while T3 (15 kg S ha-1) through elemental sulphur gave SUE of 9.73. Successive increases in sulphur levels decreased the SUE. Overall SSP (45 kg S ha-1 + Full RDF) T8 treatment was found best application to achieve maximum yield, economic return. In case of SUE T6 (15 kg S ha-1+ Full RDF) proved better than other treatments.