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Effects of farmyard manure and green manures on crop yields and nitrogen needs of potato-based cropping systems in Punjab



Effects of farmyard manure and green manures on crop yields and nitrogen needs of potato-based cropping systems in Punjab



Journal of Agricultural Science, UK 110(3): 499-504



The results of a long-term field experiment conducted from 1977 to 1984 on alluvial (Ustochrept) soil of Jalandhar showed positive responses of the crops to N. The responses of potatoes to N were reduced by farmyard manure (FYM), green manure of dhaincha and moong and the responses to the organic manures were also reduced by N. The N responses of potatoes were, however, not affected by the N applied to preceding maize. FYM was better than the green manures in augmenting total tuber yield, large-grade tuber yield and K concentration in the plants. The N applied to the potatoes showed significnt residual effect on succeeding wheat crops, reducing its optimum dose of N by about 50%. The residual effect of N on wheatwas highly correlated with nitrate status of the soil. The organic manures applied to potatoes improved the yield of the succeeding wheat but did not differ from each other. The fodder crop of pearl millet raised after 7 years also indicated the superiority of FYM to the green manures. There was a build-up of organic carbon, N, P and K in soil and the build-up was maximal with the use of FYM. The application of N had no effect on the organic carbon and nitrogen status of the soil. N improved the availability of P but decreased that of K.

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Accession: 001580745

Download citation: RISBibTeXText

DOI: 10.1017/s002185960008206x



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