Forest soil is a general term used in several soil classifications, especially in European literature, for specific soil taxa formed in temperate climates under forest vegetation, native or introduced. Soils under forests are quite varied, but in Caraş-Severin county, dominated Eutric and Dystric Cambisols (71,21%) with Haplic and Albic Luvisols (20,60%). Other types of soils are Leptosols and Rendzic Leptosols, Entic and Haplic Podzols. A very small areas are covered with Stagnic Cambisols or Luvisols. Litter organic matter, interacting with mineral soil particles, contributes to building and maintenance of soil structure and accompanying porosity, and water- and nutrient- holding capacity. There are three broad categories of littler layers or humus forms in the forests soils: mull, moder and mor. Mulls contain what are designated as Ol (SRTS) or L, F, Oi, Oe, horizons. Mor humus types, often forming in coniferous forests is slow to decompose and be incorporated with mineral soil materials in a very thin or absent Of  (SRTS) or L, F and H layers.Human activities influence in forest soils from Caraş-Severin properties and processes. Effects of acid rain and related pollutants including in some cases heavy metals have been studied.

forest; soil; litter; mull; moder; mor

Presentation: oral