Cowpea (vignaunguiculata l. walp), a short-day plant when sown in rainy season produced excessive vegetative growth and less grain, and usually high incidence of insect pests. introduction of short duration cowpea variety makes possible to grow cowpea in post rainy season under  subtropical climate of central inner  terai. as a legume, cowpea fixes its own nitrogen, however, there has not been any fertilizer recommendation for short duration cowpea variety in nepal. field experiments consisting of four sowing dates starting from first week of august at 10 days intervals, and three nutrient management: chemical fertilizers @ 20:40:20 n:p2:o5:k2o kg ha-1, farmyard manure 10 t ha-1  (fym), and half dose of chemical fertilizer + 5 t ha-1  fym were carried out in determinate cowpea var. surya to evaluate the optimum time of sowing and nutrient source under subtropical climate of rampur from 2008 to 2010…………………….

Cowpea (vignaunguiculata l. walp), a short-day plant when sown in rainy season produced excessive vegetative growth and less grain, and usually high incidence of insect pests. introduction of short duration cowpea variety makes possible to grow cowpea in post rainy season under  subtropical climate of central inner  terai. as a legume, cowpea fixes its own nitrogen, however, there has not been any fertilizer recommendation for short duration cowpea variety in nepal. field experiments consisting of four sowing dates starting from first week of august at 10 days intervals, and three nutrient management: chemical fertilizers @ 20:40:20 n:p2:o5:k2o kg ha-1, farmyard manure 10 t ha-1  (fym), and half dose of chemical fertilizer + 5 t ha-1  fym were carried out in determinate cowpea var. surya to evaluate the optimum time of sowing and nutrient source under subtropical climate of rampur from 2008 to 2010…………………….