The Role of Extension in Preparation for the Replanting of Independent Smallholders Oil Palm by the ISPO Concept in Rokan Hulu Regency. j.sos.ekon.pertan. [Internet]. 2021 Nov. 16 [cited 2026 Aug. 8];17(3):75-82. Available from: https://journal-598.unhas.ac.id/index.php/jsep/article/view/13534