Kabul Warsito, Nur Asmaq, Indra Irawan, Namira Sinarta Purba, and Johan Heinze. “Potential of Utilizing Arabika Coffee Dregs (Coffea Arabica L.) As Biochar for Increasing Fertility of Plant Media”. The International Conference on Education, Social Sciences and Technology (ICESST) 2, no. 2 (December 15, 2023): 359–367. Accessed December 21, 2024. https://ijconf.org/index.php/icesst/article/view/332.