1.
Marbun P, Nasution Z, Hanum H, Karim A. Classification of Inceptisol Soil on Robusta Coffee Plantation in Silima Pungga . IJSBAR. 2016;30(5):20-27. Accessed December 15, 2025. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/6499