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Boundaries of Horizons and Layers: A boundary is a surface or transitional layer between two adjoining horizons or layers. Distinctness: Distinctness is defined in terms of thickness of the transition zone. a - Abrupt: Less than 2 cm thick. c - Clear: 2 to 5 cm thick.
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Soil morphology and profile descriptions provide a wealth of information about soil properties in a condensed, standardized form. They allow for clear communication for mapping, research, and management purposes.
A significant number of the terms included in this glossary are words that can be found in a common dictionary, but that have specific unique meanings in the context of soil survey and soil classification. Examples include . artifacts, buried soil, artificial drainage, component, correlation, horizon, and . normal year
Letters (a, b) indicate multiple buried soil horizons within a vertical profile. Numbers (1, 2) indicate buried soils from different profiles or sites reported in the same study. Burial times and soil ages are based on dates of the burial deposits or buried horizons as reported by the authors.
If you look in a soil pit or on a roadside cut, you will see various layers in the soil. These layers are called soil horizons. The arrangement of these horizons in a soil is known as a soil profile.
A buried A horizon is a clear indication that soil and landscape processes have changed some time in the past. Compared to other mineral horizons (E, B, or C) in the soil profile, they are rich in organic matter, giving them a darker color.
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Aug 11, 2009 · This form consists of two parts: A description of the environment in which the soil occurs. A detailed soil profile description of a vertical section of the representative soil from the segment of the landscape being studied. This description is made from a vertical cut, pit, or trench.
