“Forage Potentials of Two Cowpea (Vigna Unguiculata L. Walp) Varieties As Influenced by Varying Irrigation Frequencies and Phosphorus Application Rates in Zaria”. Nigerian Journal of Animal Production 47, no. 1 (December 19, 2020): 269–277. Accessed October 27, 2026. https://www.njap.org.ng/index.php/njap/article/view/242.