Podsolation

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Ash gray, 'bleached' washout horizon and brown-black and rust-brown enrichment horizon of a heather in the New Forest
advanced podsolization of brown earth

As podsolisation (also Sauer bleaching) is described in soil science of the rearrangement of organometallic compounds in the process soil by percolating water referred to from the upper into the subsoil. Podsolation is found particularly under poorly decomposed organic matter such as needle litter, from which organic acids are washed out, which mobilize the iron in the soil and make it relocatable. The Fe compounds and Al oxides shifted from an eluvial horizon A e, which gradually becomes ash gray, into a brown-black to reddish brown illuvial horizon , with strong iron accumulation, can lead to the formation of hardened local earth or further to local stone . The resulting type of soil is called Podzol .

In the context of soil development or pedogenesis , the podsolization of a soil occurs in the interaction of a cool, temperate, humid to strongly humid climate and acidification-promoting vegetation, i.e. climaphytomorphic . It is characterized by mixed forest , coniferous forest and dwarf shrubs (heathers) and vegetation. The starting rock is typically Si-rich, Ca- and Mg-poor, permeable substrate - sandy soils - which develop as a soil type sequence via tendrils or brown earth to podzol. Podsols are typical of boreal climates under tundra and taiga , but can also be found in Central Europe and occasionally in the always humid tropics.

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