Effect of Sulphur and Zinc on Nodulation Dry Matter Yield and Nutrient Content of Soybean
ABSTRACT The effect of sulphur (S) and zinc (Zn) on nodulation, dry matter yield, nutrient content of soybean cv. Shohag (Pb-1) was studied during December, 2001 to March, 2002. The levels of S and Zn employed were 0, 10, 20, 30 and 50 kg S ha-1 and 0, 2.5, 5, 10 and 20 kg Zn ha-1, respectively. The results indicated that among the S treatments, S30 gave the highest number of nodules plant-1 mostly at the later stages of growth though the effect was not significant. Zinc also did not show any significant influence on nodulation of soybean. The highest number of nodules were obtained from Zn20 at 90 (DAS). Dry matter yield at different growth stages were significantly affected with the increasing levels of S and Zn application. Sulphur and zinc contents were also significantly increased with the increasing levels of S and Zn up to 30 kg S and 20 kg Zn ha-1 in most of the growth stages and then decreased with higher levels of S.