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Soil types by clay, silt and sand composition as used by the United States Department of Agriculture. Loam (in geology and soil science) is soil composed mostly of sand (particle size > 63 micrometres (0.0025 in)), silt (particle size > 2 micrometres (7.9 × 10 −5 in)), and a smaller amount of clay (particle size < 2 micrometres (7.9 × 10 −5 in)).
A typical Tifton soil profile consists of an 11 inches (280 mm) topsoil of dark grayish brown loamy sand.The subsoil extends to about 65 inches, strong brown fine sandy loam to 22 inches; yellowish brown sandy clay loam to 40 inches; yellowish brown mottled, sandy clay loam to 60 inches, and strong brown, mottled sandy clay to 65 inches.
The Narragansett soil series consists of coarse-loamy over sandy or sandy-skeletal, mixed, active, mesic Typic Dystrudepts. [1] [a] [3] They are well-drained, loamy soils that formed in friable glacial till mantled with a silty loess cap.
Stagnogley soil English oak near Wilsede, Germany. A stagnogley soil is a type of non-alluvial, non-calcareous soil that is typically loamy or clayey soil with a dense, impervious, subsurface horizon. [1] Stagnogley soils are related to the pseudogleys and are classified as gleyic soils. The name "stagnogley" comes from the soil's gley dynamics.
A Psamment has no distinct soil horizons, and must consist entirely of material of loamy sand or coarser in texture. In the World Reference Base for Soil Resources (WRB), most Psamments belong to the Arenosols. However, Psamments of fluviatile, lacustrine or marine origin belong to the Fluvisols. Psamments cover 3.4% of the global land mass.
The Houdek soil series is deep, well drained, loamy soil that represents many soils formed in South Dakota under grass vegetation. The dark color of the surface layer is a result of decomposition of biomass from vegetation and other materials that have been deposited over thousands of years. [ 1 ]