he graphics on Fig. 3, Fig. 4 and Fig. 5 show how the concentration of P varies with the soil's pH (treatments) to each type of fertilizer. Comparing the P concentrations of treatment A and B on the first region, near the application of fertilizer (0–7.5 mm) related to the MAP application (Fig. 3), it is observed the P concentrations in soils had a little variation, about 4.5%. The same analysis is applied to the adjacent region (7.5 mm−13.5 mm), where it is observed the P concentration variation is about 0.7%. A low P concentration was obtained for treatment C, making the detection difficult after the distance of 25.5 mm from the fertilizer application point. This result can be explained by the precipitation of P within the granule itself, which is one of the factors that lead to the small diffusion of nutrients to the outer sections of the soil in the petri dish (silva et al., 2010).