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eluviation

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eluviation

Removal of dissolved or suspended material from a layer or layers of the soil by the movement of water when rainfall exceeds evaporation. Such loss of material in solution is often referred to as leaching. The process of eluviation influences soil composition.


eluviation [ē‚lü·ve′ā·shən]
(hydrology)
The process of transporting dissolved or suspended materials in the soil by lateral or downward water flow when rainfall exceeds evaporation.


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The SOC flow in the composition of organic matter begins with litter falling on or into the soil, continues with its disintegration, transformation into humus and accumulation, and ultimate disappearance, via consumption by soil organisms, complete mineralization or illuviation into the subsoil, or eluviation out of the soil cover.
0) B brown weathering Be = "earthy" (coagulated fabric), Bl = "loamy" (dispersed fabric) E eluviation of colloids Eg = by gleying, El = by lessivation, Ep = by podzolization I illuviation of colloids Ia = argillic, Ih = humic, If = ferric G ground-water influence Go = oxidative, Gr = reductive P pseudogleying M mother substrate (unweathered), Mw = weakly weathered Two prefixes are used here: p means ploughed, r indicates relict horizons.
Morphological features of clay eluviation, formation of evident clayskins, and presence of argillic properties are still lacking.
 
 
 
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