The charge properties of 8 soil series were studied. The study shows that gibbsite is related to the pH of these soils. Negative charges exceed positive charges at the pH range of 3 to 6, thus the PZNC of these soils cannot be obtained. The sum of AI and bases is a better estimate of ECEC than of the PC of the soils. These soils are either in the recent or intermediate stage of weathering, shown by the low pH and high weathering index.