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Field trial was conducted during rabi, 2014-15 and 2015-16 at farmer’s field at K. C. Peta village of Tirupati mandal of Chittoor district, Andhra Pradesh to study the effect of nitrogen and phosphotic fertilizer levels on yield and nutrient uptake of machine transplanted rice under mechanized system of rice intensification in Randomized Block Design with factorial concept replicated thrice with four Nitrogen levels (80, 120, 160 and 200 kg N ha -1 ) and three phosphorus levels (40, 60 and 80 kg P2O5 ha -1 ). Grain and straw yields were increased with increased levels of nitrogen during both the years. Maximum grain and straw yields were recorded with 200 kg N ha -1 which was comparable with 160 kg N ha -1 and significantly superior over 120 and 80 kg N ha -1 . Highest grain and straw yield was recorded with the application of 80 kg P2O5 ha -1 which was comparable with 60 kg P2O5 ha -1 and 40 kg P2O5 ha -1 . Maximum Nitrogen, Phosphorus and Potassium uptake by grain and straw was with 200 kg N ha -1 which was at par with 160 kg N ha -1 and significantly superior over 120and 80 kg N ha -1 . Uptake of NPK by grain and straw varied non significantly with phosphorus levels and their interaction with nitrogen during both the years.

indian journal of pure and applied biosciences

Effect of Nitrogen and Phophorus Fertilizers on Yield and Nutrient Uptake by Machine Transplanted Rice under Mechanized System of Rice Intensification (MSRI)