illuviation


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illuviation

[i‚lü·vē′ā·shən]
(geology)
The deposition of colloids, soluble salts, and small mineral particles in an underlying layer of soil.
References in periodicals archive ?
The SOC accumulation in the SSL of mineral soils depends primarily on the presence of illuviation, eluviation, and/or podzolization processes; 22-25 Mg [ha.
The consequences of clay illuviation are a reduction of permeability to air and water in Bt horizons and the difficulty for roots to penetrate in them.
The absence of overlying horizons prezent to determine the stage of clay illuviation.
A Bt horizon is a B horizon in which clay has accumulated, usually by illuviation.
In a strip in the south of the biome, between the true podzols of the taiga proper and the luvisols of the deciduous forests, there are soils that share some of the formation processes that occur in the two areas, podzolization and the illuviation of clay (see vol.
Neoeluvium--A soil developed from the eluviation and illuviation of recent deposits, such as alluvium.
This is consistent with a general expectation for many soils to exhibit a zone of clay accumulation below which textures can coarsen as the limit of clay illuviation is exceeded and many substrate materials are not yet sufficiently weathered and broken down to finer textures.
An argillic horizon occurs in Ultisols, since extensive illuviation has taken place, and a kandic horizon also occurs, since the CEC of that horizon is <16 [cmol.
A cambic horizon formed by weathering of materials within the horizon rather than by gaining materials through illuviation.
Illuviation cropland of iron or aluminum-humus complexes in B horizon.
More recent illuviation and/or lateral translocation of humus can be excluded due to the structure and composition of the outcrop as well as humus maturity (C : N = 14.