Preliminary studies on the nitrogen potassium boron and molybdenum requirements of cowpea (Vigna unguiculapa) variety new era

Abstract

A field experiment was laid out in the farm attached to the Agricultural College and Research Institute, Vellayani during 1967 to study the effect of nitrogen, potassium, boron and molybdenum on cowpea variety , 'New Era'. The compared three levels of nitrogen ,0,10 and 20kg. per hectre, 3 levels of potassium 0,20 and 40 kg. per hectare, 2 levels of boron as 0 and 10kg. Borax per hectare and two levels of molydenum as 0 and 1 kg. Sodium molybdate per hectare.