Study of Soil Chemical Properties on Palm Oil Productivity in PT. Gemilang Sejahtera Abadi in East Kalimantan. j Trop. Soils [Internet]. 2023 Dec. 27 [cited 2025 Oct. 31];29(3):127-33. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/572