Soil and Soil Horizons
Soil is found in the top layers of regolith, the unconsolidated (uncompacted) matter comprised of soil, sediment, and portions of bedrock that form the outer crustal layer of th...
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Biosequence
A sequence of soils that contain distinctly different soil horizons because of the influence that vegetation had on the soils during their development. A typical biosequence would be the p...
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Soil Eluviation
When water moves through the soil, it also moves small colloidal-sized materials. This movement or leaching of materials like clay, iron, or calcium carbonate is called eluviation. The...
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Soil Illuviation
When water moves through the soil, it moves small colloidal-sized particles with it. These particles of clay, iron, humus, and calcium carbonate will be deposited in zones below the s...
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Soil Profile
The layers in the soil from the surface to the subsoil. The soil profile is the collection of soil horizons. Soil profiles will vary from location to location because of the five soil-for...
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Soil and Soil Horizons
Biosequence