Aliyu, Abdulrasheed, Donald Kelechi Madukwe, Ifunanya Ngozika Meka, and Kehinde Afeez Ojeniyi. “Effect of Triple Superphosphate (TSP) Fertilizer Rates on Cowpea Growth and Yield under Irrigation: A Case of Lowland Area, Sokoto State, Nigeria”. Journal of Current Opinion in Crop Science 7, no. 1 (March 31, 2026): 20–33. Accessed April 30, 2026. https://jcocs.com/index.php/ej/article/view/372.