Muhammad, A, AU Dikko, M Audu, and A Singh. “ - Fixation and N-Balance in Sokoto Dry Sub-Humid Agro-Ecological Zone of Nigeria”. Nigerian Journal of Basic and Applied Sciences 18, no. 2 (March 11, 2011). Accessed August 2, 2026. https://www.ajol.info/index.php/njbas/article/view/64346.