The formation of non-labile from labile P forms, adsorbed onto Fe and Al oxyhydroxides, is the reason for low residual of phosphate fertilization in tropical soils. The reversibility of non-labile P to labile forms in these soils may be favored by the reduction of Fe3+ and, or,by the reduced activity of Fe and Al oxyhydroxides. This study aimed to evaluate P adsorption and desorption, the transformation into non-labile forms and reversibility of these forms in soil samples from environments of […]

Alterations in the redox potential (Eh) of soils, as observed in hydromorphic soils, cause significant alterations in the chemical and mineralogical soil characteristics and have a strong influence on the behavior of P, altering the ratio of the labile and non-labile forms. The purpose of this study was to verify the effect of conditions of low Eh on the dissolution/reversibility of non-labile P forms and solubilization/behavior of Fe and Al oxyhydroxides. Samples of 11 soils were incubated with 300 mg […]