Endriani, Endriani, Sunarti, Yulfita Farni, Diah Listyarini, and Najla Anwar Fuadi. 2024. “The Effectiveness of Biochar, Compost, and Natural Phosphate in Improving Soil Quality in Oil Palm Plantations”. Akta Agrosia 27 (2):71-80. https://doi.org/10.31186/aa.27.2.71-80.