INFLUENCE OF PHOSPHORUS AND POTASSIUM FERTILIZER INCORPORATED WITH COWDUNG AND VERMICOMPOST ON YIELD AS WELL AS PHOSPHORUS, POTASSIUM AND SULPHUR CONTENT OF GRAIN OF BRRI dhan62

An experiment was designed at the experimental field of the farm of Sher-e-Bangla Agricultural University during the period from May to October 2014 to find out the influence of different combinations of two organic fertilizers (cowdung and vermicompost) with inorganic source of phosphorus and potassium fertilizers on BRRI dhan62 using RCBD (Randomized Completely Block Design) with three replications. The treatments were : T₀ – Control, T₁ – 100% inorganic fertilizer (IF), T₂ – 25 % of recommended dose of P from Cowdung (CD) + 75% P from IF, T₃ – 50 % of recommended dose of P from CD + 50% P from IF, T₄– 75 % of recommended dose of P from CD + 25% P from IF, T₅ –  25 % of recommended dose of P from Vermicompost (VC) + 75% P from IF, T₆ – 50 % of recommended dose of P from VC + 50% P from IF, T₇ – 75 % of recommended dose of P from VC + 25% P from IF, T₈ –  25 % of recommended dose of K from CD + 75% K from IF, T₉ – 50 % of recommended dose of K from CD + 50% K from IF, T₁₀ – 75 % of recommended dose of K from CD + 25% K from IF, T₁₁ –25 % of recommended dose of K from VC + 75% K from IF, T₁₂ – 50 % of recommended dose of K from VC + 50% K from IF, T₁₃ – 75 % of recommended dose of K from VC + 25% K from IF.  The highest grain yield m^-2 (g) was observed from 50 % K from Vermicompost + 50% K from Inorganic source which was statistically similar to 50 % P from Vermicompost + 50% P from Inorganic source. The highest straw yield m^-2 (g) was observed from 50 % P from Vermicompost + 50% P from Inorganic source which was statistically similar to 50 % K from Vermicompost + 50% K from Inorganic source. The highest P and S content in grain was observed from 50 % P from Vermicompost + 50% P from Inorganic source, highest K content in grain was observed from 50 % K from Vermicompost + 50% K from Inorganic source.