Formulation of targeted yield equations for cucumber (Cucumis sativus) under rice-vegetable cropping system in Inceptisols

Three fertility gradient stripes were created in Inceptisols of Odisha by applying no fertilizer, recommended dose of fertilizer (RDF) and double of the RDF and rice was grown during kharif, 2018 in the Central Research Farm of OUAT, Bhubaneswar. These three stripes were subdivided into 24 sub-plots and cucumber was grown with different graded doses of fertilizers and manures during rabi, 2018-19. Initial soil nutrient status, nutrient uptake, nutrient requirement, soil efficiency, fertilizer efficiency, organic matter efficiency and yield data were recorded. The highest cucumber yield (118.2 q ha-1) was obtained with 70 kg N, 40 kg P2O5 and 100 K2O ha-1. Fertilizer prescription equations were derived for targeted yield of cucumber in Inceptisols of Odisha. Nutrient requirement for producing of one quintal of cucumber yield on this technique is 0.44, 0.15, and 0.63 kg N, P2O5 and K2O. This enables the farmers to make the most efficient and profitable use of the costly inputs in farming.