The dynamics of physical and chemical properties of agronomically disturbed soils through natural postagrogenic transformation has been studied on the chronosequence of abandoned arable lands of the Tunka basin. During postagrogenic transformation observed differentiation of former plow horizons for a number of physical and chemical properties. There is a trend to recovery by anthropogenically transformed soils morphological and physico-chemical properties specific to their natural counterparts. On the basis of obtained data main stages of postagrogenic evolution of investigated soils were identified and forecasted their further changes.