Author(s):

Saurabh Tyagi, AP Garg, Prashant Ahlawat, Shubham Arya, Ankur Kumar and NC Mahajan

Abstract: The challenge that the world is facing has been to maximize food production to feed the increasing population. Further, agriculture at present encompasses many problems such as stagnating food-grain production, multi-nutrient deficiency, declining fertilizer response, reduction in land availability for cultivation, environmental pollution and land degradation. To manage long term soil fertility, productivity as well as environment quality, efficient nutrient management practices integration can be the most efficient planting practices to adopt. Therefor a field experiment was conducted during 2016-17 at Crop Research Centre of Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut (U.P.). The treatments comprised of all possible combinations of the two factors viz., efficient planting techniques (05) as main plot factor and precision nitrogen management strategies (05) as sub plot factor and replicated thrice. Experimental results revealed that the yield attributes number of grains spike^-1, spike length (cm), numbers of spikelet spike^-1 and test weight increased significantly in FIRB plots. The improvement in grain yield 28.9 and 23.2% due to land configuration under FIRB and zero tillage plots, respectively over roto till practices. The FIRB and zero tillage increased the water productivity of 29.2 and 16.2% over conventional, reduced and roro tillage treatments. Among precision N management practices, targeted yield and SPAD produced significantly higher nitrogen and potassium partial factor productivity. Target yield based N management resulted significantly higher agronomic efficiency, apparent recovery and physiological efficiency but nitrogen physiological efficiency in SPAD. The yield attributes and grain yield were significantly higher in nitrogen management F₃ and F₅ (SPAD and LCC), over rest of nitrogen management. The highest net return (Rs.54685) was obtained with ZTW> FIRB> RT> CTW> RTW. Among different precision nutrient management practices maximum net return (Rs.58865) was found in targeted yield which is very similar with SPAD (Rs. 52970). Moreover, Net return was obtained with targeted yield >SPAD>LCC>100% RDF>control. However, benefit cost ratio was found to be highest (1.75) with targeted yield which also closely with SPAD (1.65) and lowest with control (1.07). The results suggest that FIRB and ZT with targeted yield and SPAD based nitrogen management were optimum and sustainable strategy to achieve higher yield and also to improve water productivity and profitability in inceptisol soil of western Uttar Pradesh.

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