The experiment was conducted at the vegetable research farm, Depart.of Hort. and Forst. Resea., Nenivah during the growing season of ١٩٩٤ and ١٩٩٥. The objective of the research was to investigate the effect of plant spacing (١٠, ٢٠, ٣٠ cm) and phosphorus fertilizer (٠, ٢٥, ٥٠, ٧٥ kg.P٢O٥/donum),on yield and other related traits of Cowpeas.