Production potential and economics of rainfed soybean (Glycine max L. Merr.) under different fertility levels and inoculation

摘要

An experiment conducted on clay loam soil during 1995 and 1996 to study the response of soybean (variety PK-472) to different levels of N (0, 20 and 40 Kg/ha), phosphorus (30 and 60 Kg/ha) and Rhizobium culture (with and without inoculation). The pods/plant, seed/pod, seed index (100 seed weight) and seed yield either increased significantly or tended to increase with an increase in levels of nitrogen, phosphorus and Rhizobium inoculation. The seed yield of soybean increased significantly upto 20 Kg N and 60 Kg P_2O_2/ha. The B:C ratio was highest due to application of 20 Kg N/ha and application of 30 Kg P_2 O_5/ha. Inoculation with Rhizobium increased the seed yield of soybean by 11.87 and 13.05 percent with highest B:C ratio of 2.78 and 2.96 during 1995 and 1996, respectively.