Kolawole, G.O., and Y.B. Oyeyiola. “Comparative Response of Cowpea to Different Levels of Mineral P Fertilizer and Organic Residues”. The Nigerian Journal of Rural Extension and Development 6, no. 1 (April 13, 2023): 69–74. Accessed December 28, 2024. https://journals.ui.edu.ng/index.php/njred/article/view/992.