Productivity and nutrient uptake of soybean (Glycine max)-Onion (for seed) (Allium cepa) cropping systems as influenced by integrated nutrient management practices

A field experiment was carried out at PGI Research Farm, MPKV, Rahuri, Dist. Ahemadnagar (MS) during 2014–15 and 2015–16 to study the effect of INM on growth and yield on soybean-onion (for seed) crop sequence. Application of 100% RDF to preceding crop reported significantly higher values for growth and yield attributes, seed yield (25.86, 27.5 q ha⁻¹) in soybean. The succeeding crop of onion (for seed) too showed a similar trend. The nutrient uptake in soybean-onion (for seed) found highest in 100% RDF however, it was found at par with 50% RDN through CF+50% RDN through VC followed by the treatment 50% RDN through CF+50% RDN through FYM during both the years and nutrient balance was found highest in 25% RDF+25% RDN through VC+25% RDN through FYM+25% RDN through NC. After two years completion it was concluded that, combined application of 50% RDN (25 kg ha⁻¹) through CF+50% RDN through VC (19.5 t ha⁻¹) or FYM (46 t ha⁻¹) to kharif soybean followed by 100% RDN (100 kg ha⁻¹) through CF to rabi onion (for seed) along with recommended dose of phosphorus and potassium to both the crops is necessary for getting higher yield and soil health in soybean-onion (for seed) crop sequence.