Phosphate Sorption in Oxisols in Paraíba State, Brazil, Classified as Solution Equilibrium Phosphorus

Aiming to evaluate the phosphorus adsorption in oxisols with phosphorus remaining classified using the langmuir isotherm, a study was developed in the laboratory at federal university of campina grande, pb, with samples of the surface layer (0-20 cm) of three oxisols of the state of paraíba, differentiating among these the classification of the remaining p-values. the phosphorus levels for adjusting the isotherm were defined based on the remaining p-values. to assess the maximum p adsorption capacity data from p adsorbed and equilibrium concentrations of the solutions were adjusted langmuir isotherm. this isotherm model could satisfactorily describe the adsorption of phosphorus in soils. the oxisol sample with high p-rem was the highest value of maximum p adsorption capacity. the maximum p adsorption capacity was correlated with cec and ki for the samples classified as p-rem medium and high, respectively.