STUDY ON THE ADSORPTION AND DESORPTION OF PHOSPHORUS IN SOILS AND PHOSPHORUS REQUIREMENT

In this paper, the adsorption and desorption of phosphorus in the different textuie soils were studied. The maximum amount of P adsorption (Xmax) was obtained from the Langmuir equation. The main chemical and physical properties, which affecting adsorption of P were clay content, CaCO3 content and available P content in soil. Phosphorus requrement (X) was calculated from the Freundlich equation X-acb by the value of C at 0. 2ug/g P.