Fahmi, Arifin, Bostang Radjagukguk, and Benito Heru Purwanto. “Interaction of Peat Soil and Sulphidic Material Substratum: Role of Peat Layer and Groundwater Level Fluctuations on Phosphorus Concentration”. JOURNAL OF TROPICAL SOILS 19, no. 3 (October 2, 2015): 171–179. Accessed August 1, 2025. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/213.