Performance of zinc and boron on content, uptake of micronutrient and yield of cowpea (Vigna unguiculata Walp.) in Alfisols of Konkan region of Maharashtra

A field experiment was conducted at Research and Education Farm, Department of Agricultural Botany, College of Agriculture, Dapoli. The analytical work was carried out in the research laboratory of the Department of Soil Science and Agricultural Chemistry, College of Agriculture, Dapoli on Alfiosls to study the effect of micronutrient cations on yield and their uptake by Cowpea (Vigna unguiculata Walp.) during rabi season of 2019-20. Cowpea crop responded significantly to B and Zn application over control. The highest seed yield (22.51 q ha-1) and stover yield (33.50 q ha-1) was obtained with 25:60:40 N:P205:K20 kg ha-1(RDF) + Rhizobium and PSB @ 25g kg-1seed + Boron @1.5 kg ha-1 + Zinc @ 7.5 kg ha-1 over control. The highest B, Fe, Mn, Zn and Cu content in stover at 45 days after sowing, in stoverat at harvest and seed was recorded in the treatment 25:60:40 N:P205:K20 kg ha-1(RDF) + Rhizobium and PSB @ 25g kg-1seed+ Boron @ 1.5 kg ha-1 + Zinc @ 7.5 kg ha-1. The maximum uptake of B, Fe, Mn, Zn and Cu in stover, grain and their total was recorded in the treatment 25:60:40 N:P205:K20 kg ha-1(RDF) + Rhizobium and PSB @ 25g kg-1seed+ Boron @1.5 kg ha-1 + Zinc @ 7.5 kg ha-1.The minimum uptake of B, Fe, Mn, Zn and Cu in stover, grain and their total was recorded in control.