SOIL ACIDIFICATION BY FERROLYSIS IN A PEDOLOGICAL SEQUENCE OF MUNTELE MIC, CARAŞ-SEVERIN COUNTY

Abstract

Soil acidification process in aerated soils is a consequence of: (1) production of various acids in the soil, (2) the effect of ion uptake of biota, (3) nitrogen inputs and (4) the addition of dissolved strong acids. The soils formed by acidolysis process are Umbric Podzols, Umbric – entic Podzols, Haplic Umbrisols – Dystric Cambisol and Dystric Fluvisols. In the case of presence of an argic horizon with alternating aerobic and anaerobic conditions the main process is ferrolysis. During wet periods, iron oxides undergo reduction and in aerobic conditions with Fe2+ oxidation, it will be generating acid soils, like Stagni – albic Luvisols.