Lumban Gaol, Darwin, et al. “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.