Consequence of resource conservation practices on yield and nutrient uptake of soybean under cotton-soybean rotation in vertisols

Abstract

The present study was undertaken during 2016-17 at Research farm, Dr. PDKV, Akola. The experiment was laid out in Randomized Block Design with nine treatments replicated three times in Vertisols. The objectives were to evaluate the effect of different resource conservation practices on yield and nutrient uptake by soybean. The cotton based soybean rotation was followed since 2011-12. The present experiment was superimposed on soybean during 2016-17. The treatments comprised for soybean crop was recommended dose of fertilizer (RDF) alone and their compensation with organics viz., FYM, phosphocompost (PC), neemcake, bio mulch (farm waste) and green leaf manuring. The results of the present experiment indicated that, comparatively higher seed (27.20 q ha-1) and straw yield (31.25 q ha-1) of soybean was recorded with RDF alone to soybean and 25% N through Neemcake + RDF compensation to cotton crop under cotton-soybean rotation. The application of RDF alone with 25% N through Neemcake + RDF compensation to cotton crop recorded higher N (187.6 kg ha-1), whereas, application of RDF + PC with 100% N (FYM) + compensation of P through phosphocompost to cotton recorded higher P uptake (18.41 kg ha-1). The K (51.78 kg ha-1) uptake was influenced significantly with the application of RDF with 25% N through Dhaincha loppings + RDF compensation to cotton. Hence, combined application of organic sources along with inorganic fertilizers is the most vital way to maintain yield of soybean relatively at higher level and uptake under cotton-soybean rotation in Vertisol.