Author(s): S. Das, R. Nath, A. Chakraborty

Abstract: Harnessing maximum yield through varietal preference and adequate nutrition is the key to agricultural production systems. Field experiment was conducted at the “AB -Block Farm”, BCKV, West Bengal for two consecutive rabi seasons of 2012-13 and 2013-14 to evaluate three chickpea cultivars (‘Anuradha’, ‘PUSA-1003’ and ‘DCP-92-3’) for their performance under varied P O levels(0, 20, 40, 60, 80 kg P O ha-1) and to estimate the economic optimum level of for seed yield. The trials were laid 2 5 2 5 out in a split-plot design with the cultivars allotted to main plots and P2O5 levels in sub-plots. The highest mean dry matter accumulation per plant of 0.96 ,1.42 ,4.26 and 11.21 g in root, leaves, stem and pod occurred in the ‘DCP -92-3’ cultivar. The contribution of pods to total dry matter production (TDM), respectively was 63.2% in the DCP-92-3 cultivar. The mean higher dry matter (18.4 g plant-1) and seed yield (1425 kg ha-1),were obtained with 80 kg P O ha-1. The agronomic efficiency declined with the 2 5 increase in P O levels. By using the developed function relationship (Y=964.5+13.13x-0.093x2) i.e. quadratic, between seed 2 5 yield of chickpea and applied levels of P O the estimated optimum and economic doses of P O were 70.6 and 66.46 kgha-1 2 5 2 5 respectively. The response at economic optimum dose of P O was 6.67 kg seed yield per kg P O applied.

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