Idris S, Adamu M, Maiyaki MM, Mahmud AT, Haruna MA. ASSESSMENT OF PRODUCTIVITY STATUS OF VERTISOLS IN SUDAN SAVANNA ZONE OF NIGERIA. FJS. 2023;3(4):553-561. Accessed October 20, 2025. https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1685