Lumban Gaol, D., Edwin, and D. . Rezki. “Evaluation Of Land Suitability For Oil Palm (Elaeis Quineensis Jacq.) In Lubuk Karak Village Sembilan Koto District Dharmasraya”. Jurnal Riset Perkebunan, vol. 4, no. 1, Mar. 2023, pp. 14-26, doi:10.25077/jrp.4.1.14-26.2023.