Effect of Sulphur and Phosphorus on the Growth and Yield of Black Gram (Vigna mungo L.)

A field experiment was carried out during kharif season of 2019 at Research Farm, of School of Agriculture, ITM University, Gwalior. The experimental work was conducted in randomized block design with three replications. The treatment comprises of three levels of phosphorus (0, 20 and 40 kg P2O5 ha -1 ) and three levels of Sulphur. Growth parameters viz. plant height, number of branches, number of leaves plant -1 and dry matter yield plant -1 appreciably improved with the application of phosphorus up to 40 kg P2O5 ha -1 . More values of these parameters were appreciably higher with the application of 15 and 30 kg S ha -1 over the control. The root length, total and effective number of nodules plant -1 and fresh and dry weight of root nodules were significantly higher with the application of 40 kg P2O5 ha -1 while sulphur had no significant impact on these parameters. All the yield attributes, biological yield and grain yield appreciably increased with increasing rates of phosphorus as well as sulphur application. Economics revealed that, highest net return (Rs.75870.4) and benefit cost ratio (3.42) was observed with I2 while, highest net return (Rs.49153 ha -1 ) and B:C ratio (3.32) were observed with application of 40 kg P2O5 and 30 Kg S ha -1 .