Effect of Dual Inoculation of Rhizobium and PSB on Yield, Nutrient Content, Availability of Nutrient Contents and Quality of Soybean [Glycine max (L.) Merrilli]

A field experiment was conducted to study the effect of dual inoculation of rhizobium and PSB on yield, nutrient (N, P, K) content, quality parameter i.e. protein as well as oil content and availability of nutrients in soil at harvest of soybean. The highest grain yield was recorded due to inoculation of rhizobium+PSB with 100% RDF. The highest grain yield of 15.46 q ha^-1 recorded in 100% RDF+rhizobium+PSB was significantly superior over all the treatments. However, lowest of 7.52 q ha^-1 were obtained in control. The highest N (6.23%), P (2.68%) and K (2.29%) contents in seed was obtained in T₁S₃ treatment. Dual inoculation of rhizobium+PSB also improved the quality of soybean in presence as well as absence of chemical fertilizer. The residual fertility in soil was also more due to 100% RDF+rhizobium+PSB treatment.