Data on soil texture, reaction, exchange capacity, exchangeable cations and soluble SiO2 and Al2O3 are presented by sub-horizons for 17 solodized profiles. On the basis of these data the soils are divided into 3 groups of which group I is characterized by the presence of soluble salts and greater amts. of exchangeable Mg than Ca in the B horizon whereas groups II and III are differentiated mainly on the extent to which leaching has occurred as indicated by the pH and exchangeable H. The most important observed difference in the profile of the different groups is that the B horizon of group I has a columnar structure while in groups II and III it is nutlike to coarsely blocky. The characteristics of these groups indicate they may be progressive stages of solodization but proof of this point is not established.