Fahmi, A., Radjagukguk, B. and Purwanto, B. H. (2019) “The Leaching of Iron and Loss of Phosphate in Acid Sulphate Soil Due to Rice Straw and Phosphate Fertilizer Application”, JOURNAL OF TROPICAL SOILS, 17(1), pp. 19–24. doi: 10.5400/jts.2012.v17i1.19-24.