Soil test based fertilizer recommendation under IPNS for groundnut, Arachis hypogaea L. in Torripsamments of Rajasthan

摘要

Soil test crop response correlation studies were conducted with groundnut (Var. Chitra) under integrated plant nutrition system (STCR-IPNS) in Torripsamments of Rajasthan. Fertilizer adjustment equations under IPNS were formulated for groundnut following Ramamoorthy's inductive-cum targeted yield model. The nutrient requirement for producing one quintal of groundnut was found to be 3.6,1.7 and 3.0 kg of N, P_2O_5 and K_2O, respectively. The per cent nutrient utilization efficiencies from soil and fertilizer nutrients were found to be 100 and 176 for N, 98 and 65 for P_2O_5 and 44 and 210 for K_2O, respectively. Like wise the per cent nutrient utilization efficiency from farmyard manure (FYM) was 148 for N, 60 for P_2O_5 and 61 for K_2O, respectively. In STCR-IPNS technology, the fertilizer doses are tailored to the requirements of specific yield targets of groundnut taking into account the contribution from soil, fertilizers and organics.