Yusran, Fadly Hairannoor. “Existing Versus Added Soil Organic Matter in Relation to Phosphorus Availability on Lateritic Soils”. JOURNAL OF TROPICAL SOILS 13, no. 1 (January 1, 2008): 23–34. Accessed July 29, 2025. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/3.