Abstract Unavailability of essential micronutrients is a major constrain for cowpea growth,
nodulation and pod yield under acid soil condition. In this context a two year field experiment
was conducted to assess the effect of boron, molybdenum and biofertilizers on growth, nodulation
and pod yield of vegetable cowpea in acid soil of eastern Himalayan region. Treatments consisted of
four levels of seed treatment with molybdenum and biofertilizers (Rhizobium + PSB) and four
levels of foliar spray of boron, laid out in split plot design. The result revealed that combined
use of seed treatment with molybdenum (0.5 g/kg seed) and biofertilizers along with foliar spray
of boron at 4 weeks of planting significantly enhanced the growth and yield attributes of cowpea
and registered 42% and 54% improvement in number of pod and pod yield/plant respectively over
control, whereas seed treatment with molybdenum (0.5 g/kg seed) and biofertilizers alone recorded
76% and foliar spray of boron at 4 weeks of planting alone produced 39% higher pod yield/plant
over control.