Heriansyah Pasaribu, Water Balance in Oil Palm Plantation (Elaeis guineensis) at Indonesian Oil Palm Research Institute sub-unit Kalianta Kabun-Riau supervised by Prof. Dr. Ir. Aras Mulyadi, DEA and Dr. Ir. Suardi Tarumun, M.Sc. The issue of water system disruption caused by the oil palm has become the issue of the environment. Oil palm plantations rated as the cause of changes in water table …