Boniao, Renato, Jusop Shamshuddin, Eric Van Ranst, Siti Zauyah, and Syed Syed Omar. 2025. “AMELIORATION OF SOIL FERTILITY IN VARIABLE-CHARGE DOMINATED SOILS”. Mindanao Journal 26 (THE ANNUAL SERIES): 105-19. https://msu-mindanaojournal.com/index.php/ojs/article/view/430.