HartonoA., VlekP., MoawadA., & RachimA. (2001). Changes in Phosphorus Fractions on an Acidic Soil Induced by Phosphorus Fertilizer, Organic Matter and Lime. Jurnal Ilmu Tanah Dan Lingkungan, 3(2), 1-7. https://doi.org/10.29244/jitl.3.2.1-7