Hafiz M, Lubis I, Irwan D. Implementation of the Smart Method in Determining Organic Fertilizer in Palm Oil Plantations At PTPN IV Bah Jambi. CoSIE [Internet]. 2023 Dec. 20 [cited 2024 May 17];3(1):15-23. Available from: https://journal.aira.or.id/index.php/cosie/article/view/716