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During the Rabi season of 2016-17 an experiment was conducted at the Research Area of Agonomy Department in Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana (India) to observe the effect of fertilizer levels and different combinations of biofertilizers on nitrogen content and uptake. Various recommended dose of fertilizer levels (F1, F2 and F3) and different combinations of biofertilizers (B1, B2, B3, B4, B5, B6 and B7) were used as the treatments. Enhancing levels of fertilizer resulted in significant increase in N content and its uptake in grain and N uptake in straw of barley. N uptake in grain as well as in straw was recorded highest with the application of F3 with N uptake of 90.43 kg/ha in the year 2016-17. Lowest N content in grain was recorded with the application of F1. Varying fertilizer levels fail to influence N content in straw of barley. Among seed inoculation with different combinations of biofertilizers, least value for N content in grain was obtained from B1 treatment (1.70%). Seed inoculation with B5 produced highest N uptake in grain and straw, followed by seed inoculation with B6 and B7.
Keywords: Biofertilizers, Fertilizer levels, Nitrogen content and N uptake, uptake.