Author(s):

Kalpana Sharma, SP Singh, GS Rawat, Dharmendra Gaur, Hemlata Dhakad, SK Sharma and Jan Mejay Sharma

Abstract: A field experiment was conducted during 2017-18 and 2018-19 at ICAR- CPRI-RS, Gwalior M.P. during kharif and rabi to judge the “effect of nutrients application on potato based cropping system”. The experiment was laid out in split-plot design with three replications. In main plots three cropping systems viz. M₁: Cowpea – Potato, M₂: Maize + Cowpea – Potato, M₃: Maize – Potato with five sub plots of fertility levels viz. F₁: 150% RDF, F₂: 125% RDF, F₃: 100% RDF, F₄: 75% RDF + 25% organic and F₅: 50% RDF + 50% organic replicate three times. At maturity stage, maximum haulm fresh weight and dry weight was found under (150% RDF) which was at par with (75% RDF + 25% N through FYM) followed by (125% RDF) and (100% RDF) recommended doses of fertilizer. Application of 150% RDF (8.34 tubers plant^-1) recorded maximum no. of tubers plant^-1 which was at par with (75 RDF + 25% N through FYM) followed by 125% RDF among all remaining treatments. Maize + Cowpea – potato based cropping system recorded maximum potato equivalent yield of system viz. 46.54, 53.81 and 50.17 t/hectare in the year of 2017-18, 2018-19 and pooled basis, respectively as compare to other cropping systems. Equivalent yield of maize, cowpea were also calculated. Maximum equivalent yield of potato on system (47138.09 kg hectare^-1 was registered under 150% RDF. This treatment was significantly superior as compare to remaining treatments. Cowpea – potato based cropping system recorded maximum value Per Rs investment ratio and B: C ratio 2.53 and 1.53 on pooled basis, respectively as compare to other cropping systems. Combination of different fertility level had considerable effect on value Per Rs investment ratio and B: C ratio. Maximum ratio 2.47 and 1.47 was registered under 75% RDF + 25% N through FYM.

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