Nugroho, B. A., Widyatama, A., Ma’shum, H., & Gumilang, B. C. A. (2026). Geomorphological Controls on Soil Fertility Across Potential Rice Expansion Areas in Tropical Lowlands. Acta Solum, 4(3), 191–200. https://doi.org/10.20527/actasolum.v4i3.3742