EFFECT OF INTEGRATED NUTRIENT MANAGEMENT UNDER REDUCED TILLAGE ON YIELD AND NUTRIENT UPTAKE OF WHEAT (Triticum aestivum L.)

A field experiments was conducted during 1999-2000 and 2000-2001 at the Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi in split-plot design with three replications to assess the effect of INM on wheat under reduced tillage. The field experiment was initiated with green manure crop of Dhaincha (Sesbaniacanabena) which was followed by rice and finally test crop of wheat was taken. Recommended does of N,P and K(120:60:60) were applied to rice and grain and straw yields were recorded during both the years. Four main plot treatments comprising of tillage methods and green manuring and seven sub plot treatments comprising of different combination of chemical and organic nitrogen sources were tested. The maximum yield of grain and straw; N,P and K content in grain and straw and their uptake were recorded under conventional tillage with green manuring(M4) and minimum was under reduced tillage without green manuring (M1) during both the years. The subplot treatment S7 where in 4t ha-1 of sludge was added in addition to 100% N through chemical sources gave maximum grain and straw yield and N concentration and uptake. However, the highest P,K concentration in grain and straw were achieved by applying 50% N through urea and 50% N through sludge. P uptake was found to be maximum in S7 and minimum in S4. Grain and straw removed maximum Kin S7 whereas minimum K removal was recorded with S1 during both the years of experimentation.