Studies on Use of NPK and Organic Manures on Growth, Yield and Quality of Lettuce (Lactuca sativa) cv. Grand Rapid

The experiment was conducted in the Departmental field of Horticulture, Naini Agricultural Institute, Sam Higginbottom, University of Agriculture, Technology and Sciences, Prayagraj (U.P) during 2020-2021, by randomized block design consisting of 7 treatments and three replications with different combination of NPK and Organic manures. Based on the present investigation, it is concluded that the treatment T5 (50% RDF + 25% FYM + 25% Poultry manure) was found to be superior all-over other treatments with respect to Plant height at 45 DAS (21 CM), Number of leaves plant-1 at 45 DAS (21.1), Leaf length at 45 DAS (19.90 cm), Leaf width at 45 DAS (16.2 cm), Leaf area at 45 DAS (232.5 cm), Leaf area index at 45 DAS (20.4 cm2), Leaf weight (107.6 g), Leaf yield plot-1 (10.5 kg), Leaf yield ha-1 (23.4 kg), Vitamin-C (3.5) content and TSS (3.4°Brix) of Lettuce under agro-climatic condition of Prayagraj. Among all other treatments, T5 (50% RDF+ 25% FYM + 25% Poultry manure) has obtained Highest Gross return, Net return, and Benefit Cost ratio (1:3.8) which states that it is economically profitable compared to all other treatments.