Effect of Intra-row Spacing on Growth and Yield of Three Cowpea (Vigna unguiculata L. Walp.) Varieties under Rainfed

A field experiment was carried out under rainy season 2006-07, at two locations (Kordofan university farm and Jabal Kordofan ) in Sheikan District, North Kordofan State, Sudan, to investigate the effects of four intra-row spacing (50, 75, 100 and 125cm) and three varieties (Dahab Elgoaze, Eien Elghzal and Buff) A randomized Complete Block Design (RCBD) with four replications was used on growth and yield of cowpea.. The results showed that intra-row spacing had no significant effect on vegetative growth attributes and phenolgical characters. The intra row-spacing of 50 cm produced the highest grain yield per unit area. Buff was characterized by late maturing, high seed weight and high productivity (t/ha). Dahb Elgoaze was early in flowering and maturity. Eien Elgazal gave a highest harvest index.