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An experiment was conducted on medium black calcareous clayey soil to evaluate some cow-based bio-enhancers and botanicals for organic cultivation of cowpea (var. GC-6) during summer-2019 at Junagadh Agricultural University, Junagadh. The experiment comprising randomized block design with twelve treatments and three replications. The results revealed that next to 100% RDF, application of FYM @ 4 t/ha + Biofertilizers (Rhizobium @ 30 ml/kg seed + PSB @ 3 L/ha + KSB @ 3 L/ha) and Panchagavya as foliar spray @ 3% at 30 and 45 DAS + FYM @ 2 t/ha found significantly higher in terms of P content in seed, NPK content in stover and NPK uptake by organic cowpea. Whereas, the content of N and K in seed were significantly higher under FYM @ 4 t/ha + Biofertilizers (Rhizobium @ 30 ml/kg seed + PSB @ 3 L/ha + KSB @ 3 L/ha), followed by RDF through chemical fertilizers, Panchagavya as foliar spray @ 3% at 30 and 45 DAS + FYM 2 t/ha and Jeevamrut @ 500 L/ha with irrigation at sowing, 30 and 45 DAS + FYM 2 t/ha. While higher organic carbon and available NPK after harvest of the cowpea were recorded under the treatment of FYM @ 4 t/ha + Biofertilizers (Rhizobium @ 30 ml/kg seed + PSB @ 3 L/ha + KSB @ 3 L/ha), followed by FYM @ 4 t/ha and Jeevamrut @ 500 L/ha with irrigation at sowing, 30 and 45 DAS + FYM 2 t/ha.

international journal of chemical studies

Effect of various cow-based bio-enhancers and botanicals on soil fertility after harvest, nutrient content and uptake by organic cowpea (Vigna unguiculata L.)