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The experiment was carried out at the farm of Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal from August to October of 2011-12 and 2012-13, respectively. To investigate the effect of phosphorus enriched vermicompost on yield of ground nut under irrigated conditions. The experiment was laid out in a RBD design with 14 treatments which replicated thrice. Highest pod yield was obtained from T7, that receiving 150% phosphorus through rockphosphate enriched vermicompost grade-I) (2400.50 kg ha-1) whereas, the treatment receiving 100% recommended dose through sole application of chemical fertiliser (T1) (1479.00 kg ha-1) was lowest yield. Dry matter accumulation increased significantly with crop age. Pooled data revealed that T7 (4402.86 g m-2) performed better in all sampling days. The lowest Dry matter accumulation was observed in T1 (1096.66 g m-2). The treatment T7 recorded the highest value (4.02) of LAI at 75DAS and thereafter declined towards maturity. The highest value of 100-pod weight ,100-kernel weights and harvest index were recorded in T7 respectively (93.22 gm) (63.56 gm) and. (44.04%).It was observed that haulm yield of T4 recorded highest value of haulm yield (3541.10 kg ha-1 )and T8 recorded lowest value of haulm yield (3159.00 kg ha-1) . Pooled data revealed that T7 has highest (86.43%) shelling out and T1 has the lowest value (57.84%). Among the Phosphorus use efficiency, Highest Partial factor of productivity and Agronomic efficiency were observed in T5 respectively (55.21 kg ha-1) and (29.99 kg ha-1). Apparent recovery was highest in T7 (306.46%) and maximum value of Physiological use efficiency was noticed in T3 (26.23 kg ha-1).

Keywords

100-pod Weight, 100-Kernel Weight, Dry Matter Accumulation, Groundnut, Haulm Yield, LAI, Phosphorus Enriched Vermicompost, Phosphorus use Efficiency, Pod Yield

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