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illuviation

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il·lu·vi·a·tion  (-lv-shn)
n.
The deposition in an underlying soil layer of colloids, soluble salts, and mineral particles leached out of an overlying soil layer.

[illuvial, resulting from illuviation (in- + -luvial, relating to the action of flowing water as in alluvial) + -ation.]

illuviation [ɪˌluːvɪˈeɪʃən]
n
(Earth Sciences / Geological Science) the process by which a material (illuvium), which includes colloids and mineral salts, is washed down from one layer of soil to a lower layer
[from Latin illuviēs dirt, mud, from il- + -luviēs, from lavere to wash]
illuvial  adj

illuviation  (-lv-shn)
The deposition of colloids, soluble salts, and suspended mineral particles in a lower soil horizon through the process of eluviation (downward movement) from an upper soil horizon.


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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.
Clay illuviation This process consists in the translocation of claysize particles from eluvial (A, E) to illuvial horizons (mainly Bt, and to a lesser degree, in BA or BC horizons).
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.
 
 
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