Fig. 5. The shrinkage curves from three Typic Chromexert soils modeled by Eq. [10]: The square point (_z, e_z) is the end-point from residual shrinkage to zero shrinkage; the cross point (_d, e_d) is the dry-side maximum of the curvature; the diamond point (_p, e_p) is the end-point from the proportional shrinkage to residual shrinkage; the plus point (_w, e_w) is the end-point from structural shrinkage to proportional shrinkage.