Ebsan Marihot Sianipar, Sumihar Hutapea, and Siti Mardiana. “Effects of Oil Palm Trunk Biochar on Nutrient Uptake and Growth Performance of Oil Palm Seedlings in Pre-Nursery ”. JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) 7, no. 1 (January 7, 2025): 281 -. Accessed June 27, 2025. https://ejournal.uniks.ac.id/index.php/JUATIKA/article/view/4131.