Effect of sulphate,phosphate and molybdate application on quality of soybean grain

Summary Effect of S, P and Mo application on quality of soybean grain was studied at Haryana Agricultural University, Hissar (India), in pots. Sulphur was applied at 0, 40, 80 and 120 ppm, P at 0, 40, and 80 ppm and Mo at 0 and 1 ppm. Increasing levels of S upto 120 ppm increased crude protein, cystine, cysteine and methionine contents of grain. However, oil percentage significantly increased only with 40 ppm S and with higher levels of S a decreasing trend was observed. The reducing, non-reducing and total sugars increased with 40 and 80 ppm S and thereafter decreased. Application of 40 ppm P significantly increased reducing total sugar and methionine content of seed whereas Mo application depressed cystine and cysteine. The S concentration in leaves gave positive significant correlation with the percentage of crude protein, oil, total sugar and S containing aminoacids, whereas Mo concentration of leaves was found negatively correlated with cystine and methionine.