The upper subsoil may or may not have mottles. Seasonal water table is between 12 to 24 inches. Poorly drained soils typically have a blackish surface layer that is underlain by a gray subsoil that is mottled. These soils have a water table at or near the surface for a significant portion of the year. soil feature unique to some coarse textured soils is a dark reddish or yellow layer often referred to as a rust line. This feature can form within the soil through two contrasting processes which may or may not be the result of a high water table.
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