Response Of Effective Rhizobial Strains And Their Combination On Symbiotic Traits And Yield Of Soybean Under Rainfed Conditions Of M.P. (India)

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Field experiment were conducted for three consecutive years in the Kharif season of 1998-99, 1999-2000 and 2000-2001 at Research Farm of R.A.K. College of Agriculture, Sehore (M.P.). The findings revealed that the combined inoculation of Pantnagar 2 + Delhi 2 + Bj-1 rhizobial strains yielded the significant highest symbiotic traits viz. nodule number, their dry weight and shoot dry weight/ plant alongwith seed index (100 seed weight) and seed yield of Soybean over uninoculated control. The dual inoculation of Pantnagar 2 + Bj-1 rhizobial strains produced the significant symbiotic traits alongwith seed index and seed yield except the nodule dry weight/plant. Amongst the alone strains, Delhi -2 strain, produced the siginificant highest nodule dry weight, seed index and seed yield while the significant higher nodule number and shoot dry weight have fetched through the incorporation of Bj-1 rhizobial strain alone over control in clay loam soil.

Rhizobial strain; Symbiotic traits; Soybean