The regularities of the formation of the acid-base state and acid-base buffering of brownish-podzolic gleyed soils of Eastern Carpathian Foothills, which function in their natural state under forest cover, under minimal anthropogenic influence under undrained pasture, and after drainage melioration of different durations – under haymaking since 1974 and under pasture since 1914. It was established that indicators of the potential buffer capacity in the acidic and alkaline interval, the coefficient of buffer asymmetry and the neutralization indicator objectively reflect changes in the buffering capacity of the soil under anthropogenic influence. To determine the effect of the lime, phosphorite flour, lime in combination with phosphorite flour on the transformation of acid-base buffering capacity, an indicator of the filling factor of the buffer capacity is proposed, which is calculated using the areas of the figures that are formed on the graph between the curves of the potentiometric titration of the aqueous suspension of soil and the aqueous suspension of quartz sand. The parameters of its indicators were established 1 and 2 years after the introduction of the chemical ameliorants into the soil.