- Utami, Sri Nuryani Hidayah., Indrawati, Uray Suci Yulies Vitri. (2023). Oil palm empty fruit bunch biochar fertilizer as a solution to increasing the fertility of peat soil for sustainable agriculture. International Journal of Recycling of Organic Waste in Agriculture, 13(1), 1-11, https://doi.org/10.57647/j.ijrowa.2024.1301.03