Effects of oil palm bunches and coal fly ash on the cation exchange capacity of reclaimed mining soil. - Saidy, Akhmad Rizalli; Priatmadi, Bambang Joko; Septiana, Meldia; Haris, Abdul; Mulyawan, Ronny; Abduh, Andin Muhammad; Utami, Aditya Dyah (Journal of Ecological Engineering, 2025)