Pal, M.S.Amrendra Kumar2017-07-082017-07-082016-08http://krishikosh.egranth.ac.in/handle/1/5810024704The present study was carried out during 2013-14 and 2014-15 at Norman E. Borlaug Crop Research Centre, G. B. Pant University of Agriculture and Technology, Pantnagar, district Udham Singh Nagar, Uttarakhand, India representing the Tarai belt of Uttarakhand to study the effect of tillage and nutrient management on growth, productivity, profitability and resource use efficiency of maize-wheat cropping system. The experimental site was silty clay loam having soil pH 7.21, organic carbon 0.68% and 242.42, 22.56 and 240.32 kg/ha available N, P2O5 and K2O, respectively. The experiment was laid out in a split plot design with 18 treatments with 06 tillage options i.e. FIRBS, conventional tillage (CT), sub soiling (SS), zero tillage (ZT), minimum tillage with two pass of rotavator (MT) and permanent raised bed system (PRBS) in main plot and 03 nutrient levels i.e. 50% of recommended dose of fertilizers (50% RDF), site specific nutrient management (SSNM) and 100% recommended dose of fertilizer (RDF) in sub plot with three replications. The crop was grown as per recommended practices. Tillage had significant effect on growth, yield attributes, N, P and K content and its uptake and economics of both maize and wheat crops. Significantly higher growth attributes of maize were recorded under FIRBS. Similarly maize yield was recorded 18.3, 17.2 and 14.2% higher under FIRBS than CT, SS and ZT, respectively. Significantly higher gross return, net return and benefit :cost ratio of maize were observed under FIRBS. The recommended dose of fertilizers (RDF) also had significantly higher growth attributes, yield attributes, N, P and K content and uptake and economics. Similarly in wheat crop, tillage had significant effect on growth attributes, yield attributes, N, P and K content and uptake and its economics of wheat crop. Wheat yield was recorded significantly higher under FIRBS and PRBS being both had equal values that was 9.5 and 16.0% greater than CT and MT, respectively. Similarly higher gross return, net return and benefit cost ratio were observed under FIRBS and followed by PRBS. The RDF also had significantly higher growth attributes, yield attributes, N, P and K content and its uptake as well as economics. Tillage options and nutrient levels had significant effect on residual soil fertility of maize- wheat system. The resource use efficiency of maize - wheat cropping system was recorded higher under PRBS and FIRBS at 50% recommended dose of fertilizers. Similarly higher gross return, net return and benefit : cost ratio of maize - wheat cropping system were also observed under FIRBS and PRBS at 100% recommended dose of fertilizers. It is therefore concluded that maize and wheat crops may be planted either on FIRBS or permanent raised bed system (PRBS) with application of recommended dose of fertilizers i.e. 120:60:40 and 150:60:40:: N: P2O5:K2O kg/ha for maize and wheat, respectively for higher productivity, profitability and system use efficiency of maize-wheat system in Tarai region of Uttrakhand and also be replicated in whole Indo-Gangetic plains of India.ennullThesis