Pratiwi, Gagad Restu, and Arinal Haq Izzawati Nurrahma. 2024. “Biochar and Humic Substances Roles for Nitrogen Transformation in Agriculture”. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) 13 (4):1442-52. https://doi.org/10.23960/jtep-l.v13i4.1442-1452.