The movement of material in true solution of colloidal suspension from one place to another within the [[soil]]. Soil horizons that have lost material through eluviation are eluvial; those that have received material are illuvial.
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'''Eluviation''' is the movement of material in true solution of colloidal suspension from one place to another within the [[soil]]. Soil horizons that have lost material through eluviation are eluvial; those that have received material are illuvial.