Journal of FARM SCIENCES, Vol 31, No 3 (2018)

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Effect of conservation tillage and nutrient management practices on system productivity and economics of different crops under rainfed conditions of Karnataka

P. S. PRABHAMANI, H. B. BABALAD

Abstract


Field experiment was carried out on a fixed site during kharif and rabi seasons for four years at Main AgriculturalResearch Station, Dharwad to evaluate different conservation tillage and nutrient management practices on crop yields inthree cropping systems. The results revealed that, no tillage with broad bed and furrow and crop residues retained on thesurface (CT1) and application of recommended dose of fertilizer+ farm yard manure) (NM2) recorded significantly highercrop yields over other conservation and conventional tillage systems. With respect to system productivity CT1 recordedsignificantly higher maize equivalent yield (8.98 t ha-1) as compared to other tillage practices. Among the cropping systems,irrespective of tillage treatments, groundnut-sorghum cropping system recorded significantly higher system productivity(11.14 t ha-1) over other cropping systems. Among the nutrient management practices, application of RDF+FYM recordedsignificantly higher maize equivalent yield over RDF alone (8.72 t ha-1 and 8.35 t ha-1, respectively). The CT3 wassignificantly superior with respect to net returns (` 77,625 ha-1) over rest of the treatments. Among the interactions, notillage with flatbed and crop residues retained on the surface with application of RDF alone in groundnut-sorghum croppingsystem (CT3CS1NM1) recorded significantly higher net returns (` 1,23,277 ha-1) over other interaction effects.

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