The phosphorus diffusion rates in soil were performed in Petri dishes containing moist soil, according to the method described by . This method consists to use a pre-treated paper to mark the P diffusion in soil. In each Petri dish with diameter of 8.6 cm, 78 g of dry and sieved 2.0 mm mesh soil were added to achieve the desired density of 1.2 g.cm -3 . The chemical and physical soil properties are shown in Table . In order to achieve 70% of the maximum soil water retention capacity, 15 mL deionized water were added. The papers are scanned and analyzed using image software .