Marbun P, Nasution Z, Hanum H, Karim A. Classification of Inceptisol Soil on Robusta Coffee Plantation in Silima Pungga . IJSBAR [Internet]. 2016 Dec. 10 [cited 2026 Feb. 13];30(5):20-7. Available from: https://gssrr.org/JournalOfBasicAndApplied/article/view/6499