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Effect of phospho enriched compost and zinc on soil properties and productivity of blackgram (Vigna mungo)

A field experiment was conducted during kharif 2018 at Rajasthan College of Agriculture, Udaipur (Rajasthan), to study the effect of phospho enriched compost and zinc on soil properties and productivity of blackgram (Vigna mungo L.) in Typic Haplustepts soil of sub-humid southern plain of Rajasthan. The treatments comprised of four levels of phospho enriched compost (PEC), i.e. control, PEC @ 2, 4 and 6 t/ha and four levels of zinc i.e. control, Zn @ 2, 4 and 6 kg/ha.The experiment was laid out in a factorial randomized block design with three replications. Results revealed significant increase in soil available nitrogen, potassium and zinc content with increasing levels of phospho enriched compost and zinc up to 4 t/ha and 4 kg/ha, respectively and also significantly enhanced the crop yield, protein content and economics of blackgram. However, interactive effect of the seed and stover yield was found to be significantly higher in combined application of phospho enriched compost @ 6 t/ha and zinc @ 6 kg/ ha as compared to other combinations of phospho enriched compost and zinc. The application of phospho enriched compost @ 4 t/ha and zinc @ 4 kg/ha along with the recommended dose of fertilizer results in significantly higher productivity, protein content and economics of blackgram under Typic Haplustepts soil.