Syaf, Hasbullah, Muhammad Albar Pattah, and Laode Muhammad Harjoni Kilowasid. “Quality of Soil from the Nickel Mining Area of Southeast Sulawesi, Indonesia, Engineered Using Earthworms (Pheretima sp.)”. Journal of Degraded and Mining Lands Management 8, no. 4 (July 1, 2021): 2995–3005. Accessed October 5, 2024. https://www.jdmlm.ub.ac.id/index.php/jdmlm/article/view/937.