Effect of Bradyrhizobium Inoculation on Yield and Yield’s Components of Soybean (Glycine max (L.)) Grown in Sudan

Abstract

Field experiments were carried out at Shambat, Sudan (Latitude 15º 40´N and Longitude 32º 32´E) in three consecutive seasons (2000/03) to investigate the effect of Bradyrhizobium inoculation and chicken manure or sulphur fertilization on growth, nodulation and yield of soybean. The results showed that inoculation, chicken manure, sulphur and their interaction significantly (P=0.05) improved the dry weight of shoots and roots, nodulation, yield and yield components. Measured parameters increased by with increasing the level of chicken manure or sulphur and the highest value of each parameter above were observed with either 10 t/fed chicken manure or 100 kg/fed sulphur with or without Bradyrhizobium inoculation. The residual effect of chicken manure or sulphur significantly (P=0.05) improved all the measured parameters at 10 t/fed chicken manure or 100 kg/fed sulphur with or without Bradyrhizobium inoculation.