amallya, L. and Aisyah, S. 2026. Analysis of Soil Heavy Metal Absorption with the Application of Biochar Based on Oil Palm (Elaeis guineensis Jacq.) Frond Waste . JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA). 8, 3 (Sep. 2026), 817 -. DOI:https://doi.org/10.36378/juatika.v8i3.5845.