Forage potentials of two cowpea (Vigna unguiculata L. Walp) varieties as influenced by varying irrigation frequencies and phosphorus application rates in Zaria. NJAP [Internet]. 2020 Dec. 19 [cited 2026 Oct. 28];47(1):269-77. Available from: https://www.njap.org.ng/index.php/njap/article/view/242