Integrated Effect of INM and Reduced Tillage on Economic Yield, Nutrient Uptake of Wheat (Triticum aestivum L.) and Soil Properties

A field experiments was conducted for two consecutive years 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 yield and nutrient uptake of wheat and soil properties under reduced tillage. The field experiment was initiated with Dhaincha (Sesbania canabaena) as green manure crop followed by rice and finally test crop of wheat. Recommended doses of N, P and K (120:60:60) were applied to rice. The grain and straw yields were recorded in both the years. The maximum grain yield, N content in grain and total nitrogen uptake by wheat were recorded under conventional tillage with green manuring (M4) and minimum was under reduced tillage without green manuring (M1) during both the years. The sub-plot treatment wherein 4 t ha-1 of sludge was added with 100 % N through chemical source gave maximum grain and straw yield, N concentration and its uptake. In the main plot treatment, the organic carbon content was highest under reduced tillage with green manuring (M2) followed by S7 conventional tillage with green manuring. In subplot treatment, maximum organic carbon content was observed with the treatment receiving 50 % N through +50 % N through rice residue and sludge + Azotobacter which was significantly higher than other subplot treatments. Maximum available soil nitrogen was obtained under conventional tillage with green manuring which was significantly superior than other main plot treatments, except the treatment having reduced tillage with green manuring. The treatment (S7) significantly higher available N at harvest than other subplot treatments, barring treatment S5 during first year.