Productivity of Groundnut as Influenced by Integrated Use of Lime, Organics, Inorganic Fertilizers, and Biofertilizers in Acidic Soil of Tripura

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A field experiment was carried out on acidic soil of Khowai district of Tripura during 2017 and 2018 to study the effect of application of various combinations of lime, farmyard manure (FYM), poultry manure (PM), and rhizobium with the recommended doses of NPK on groundnut (Arachis hypogaea L.) productivity. The experiment was conducted in a completely randomized block design with 13 treatments; each replicated thrice. The application of the recommended dose of NPK @ 20:60:40 kg ha-1 along with lime @ 1/5th Lime Requirement (LR), PM @ 5 t ha-1 and seed treatment with Rhizobium @ 20 g kg-1 of seed significantly increased the seed yield and recorded the highest Benefit : Cost ratio (B:C) compared to the recommended dose of NPK alone as well as other treatments combinations. Thus, in achieving higher groundnut productivity with better return in acidic soils of Tripura, integrated use of inorganic fertilizers (NPK @ 20:60:40 kg ha-1) combined with lime @ 1/5th LR, PM @ 5 t ha-1, and seed treatment with Rhizobium @ 20 g kg-1 of seed might be recommended.