This study aims to evaluate the effect of liquid biofertilisation with various concentrations on the growth and yield of oil palm (Elaeis guineensis Jacq). The research was conducted at the land for research Agriculture Faculty, Sriwijaya University, Ogan Ilir, South Sumatra, from February to May 2024. The oil palms used were fifteen years old. The design used was a Randomised Block Design (RBD…