Finalis, E.R., Sri Djangkung, S.M., Arfiana, Noor, I., Suratno, H., Rosyadi, E., Saputra, H. and Noda, R. 2020. Development of Carbon Based NPK Slow Release Fertilizer using Biochar from Oil Palm Empty Fruits Bunch. Indonesian Journal of Energy. 3, 1 (Feb. 2020), 19-24. DOI:https://doi.org/10.33116/ije.v3i1.45.