Podzol soil

Fig. 8A,B shows the general geographic-geological context of this site, which is located at an altitude of 1950 m, north-west of Mont Blanc. The site is situated in a pasture area above the tree limit. It is characterized by a soil cover of about half a meter on local till material, formed by granitic gneisses (Atteia, 1992 Dalla Piazza, 1996). Fig. 8D shows the complete profile which has the typical characteristics of an evolved silicate-dominated soil (podzol with its characteristic eluvial ash-grey E-horizon). The same figure shows the pH values of the local rain, the soil, the percolation and local spring waters. Complete analyses can be found in Appendix A.l. To the right of the soil column, some of the chemical variation of the solid material and the percolation waters of the six different soil horizons and the parent rock (granitic gneiss) are portrayed.

Riquier, J., Les phytolithes de certains sols tropicaux el des podzols, Trans. 7th Internat. Congress Soil Sci., Madison, WI, Vol. 4, 1960. 

Fig. 3. Podzol profile at NASGLP sample site NB072009. Podzols were the soil type at approximately 100 of the 118 sites. 

The main soils of Forest Ecosystems are Podzols and Podzoluvisols. There are plenty of various soil subtypes, groups and families among these two main soil types. However, all forest soils have a number of common features originating in the similarity of processes occurring therein. The retarded biological cycle provides the organic materials for the build up of the covering layer on the soil surface. This layer consists... 

In the southern direction the Podzols are transferred into Podzoluvisols and Distric Phaerozems. These soils have less acidity and less pronounced migration of various elements. Accordingly, this determines the exposure pathways of pollutants, like heavy metals, in soil compartments of forest ecosystems. 

Gottlein A, Matzner E. Microscale heterogeneity of addity related stress-parameters in the soil solution of a forested cambic podzol. Plant Soil 1997 192 95-105. 

Lepista, Mycena species) and symbionts (particularly the edible species X. badius, X. chrysenteron and Lactarius spp.)- The decrease in Cs specific activity with increasing depth of the mineral soil has one particularly important ecological consequence the coincidence of species-specific rhizospere with a variable load of radioactivity generates inter-specific differences in I37(3g accumulation. For authomorphous soil types, a decrease in radionuclide content with depth is common, but the gradient of this decrease is quite variable (Fig. 4). In some soddy-weakly-podzolic soils, the vertical distribution of specific activity is quite uniform, but in others, secondary peaks of activity were associated with the presence of heavier soil at various depths (6-12cm 16-20cm). However, overall, the vertical distribution of Cs activity was comparable in all the soils analysed. 

Groundwater and stagnant water soils (gleys and pseudogleys) and podzols of temperate and cool regions. Paddy soils. 

Another group of soils in which ferrihydrite has been identified are podzols (Spo-dosols) (Goodman Borrow, 1976 McBride et al., 1983 Schwertmann Murad,... 

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