This research aimed to determine the effective concentration of surfactants and herbicide active ingredients to control weeds in mature oil palm (Elaeis guineensis Jacq.) plantations. This research was conducted at Intimegah Bestari Pertiwi Inc. Sungai Ampalau Estate (SAE), Kemang, Sanga Desa, Musi Banyuasin, South Sumatra, from November 2022 to February 2023. The research used a factorial rand…