Abstract
The influence or nitrogen, phosphorus and sulphur alone and in combination was corrtp-ated for yield and yield components of 1.141 soybeari cultivars. The doses employed were zero, 0.382 mg N, 0.582 mg P, 1,97 rag 5, 0.382 mg N + 0,582 mg P. 0.582 mg P 1.97 mg S and 0.382 mg N 1,97 mg S per pot containing 10 kg soil., There were fivz replications in all. As judged from this study nitrogen stimulated plant height and leaf area and phos-phorus reduced days to flowering. Nitgrogen + phosphorus sho-wed much improvement in pod setting, enhanced length of pod, reduced days to maturing and was high yielding combination Among the cultivars of soybean. Davis proved to be early maturing and high yielding.
INTRODUCTION
To enhance soybean production, use of fertilizers in appropriate amount and at proper time in of great iraprtance. Application, of nitrogen aloogwith adequate supply of phosphorus helps in increasing soybean productivity conside-rably. Phosphorus also plays pivotal role in stimulation of nodule bacteria, while sulphur deficiency affects the chemical composition of stem, Icaveas and Seeds lishizaka., 1971,1 Sharma and Bradford, 1973; M3arsi el al. 1976 and. Hamissa, 1980L Sulphate application is known to increase and phosphorus application dec-rease dry matter yield significantly in Trifaiiirn alexandrifirm L. (vIstrok and Dry. 1980). The seed yield and forage of Vicia faba L. were i►freque,atly and unpre-dictably affected by the rate of nitrogen application, method or application date (Richards and Soper. 19S2). The present experiment was planned to evaluate the effect of phosphorus, sulphur and nitrogen application on the yield of soybean cultivars.
