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The present experiment entitled, “Interactive effect of fertilizer levels and different combinations of biofertilizers on economics of barley in 2015-16” was conducted during the Rabi season of 2015-16 at the Agronomy research farm of Chaudhary Charan Singh Haryana Agricultural University, Hisar. The experiment was laid out in split plot design with three fertilizer levels (50, 75 and 100 per cent RDF) in main plots and seven different combinations of biofertilizers (Uninoculated, seed inoculation with Azotobacter, Azospirillum, PSB, Biomix, Azotobacter+PSB and Azospirillum+PSB) in sub plots replicated thrice. Based on the research investigation it was found that highest gross returns, net returns as well as benefit: cost ratio was recorded with application of 100 % RDF in 2015-16. The increase in net returns with application of 100 % RDF as compared to 50% RDF was Rs 9,554 in the year 2015-16. Seed inoculation with Biomix resulted in net returns of Rs. 36, 346 in year 2015-16. Least value for gross returns was recorded in uninoculated treatment. Seed inoculation with Biomix resulted in highest benefit: cost ratio while lowest value of benefit: cost ratio was obtained with uninoculated treatment.
Keywords: fertilizer levels, Biofertilizers, Biomix, Economics, RDF.