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Orthods. Orthods are the relatively freely drained Spodosols that have a moderate accumulation of organic carbon in the spodic horizon. They are most extensive in the Northeastern United States and the Great Lakes States. Most Orthods are used as forest or have been cleared and are used as cropland or pasture.
Spodosols. Spodosols (from Greek spodos, "wood ash") are acid soils characterized by a subsurface accumulation of humus that is complexed with Al and Fe. These photogenic soils typically form in coarse-textured parent material and have a light-colored E horizon overlying a reddish-brown spodic horizon. The process that forms these horizons is ...
Oct 22, 2012 · Thus, organic matter accumulates and the A horizon gets really dark in color. Cryods are Spodosols that have evidence of freeze-thaw. Humods are Spodosols that have large amounts of organic matter accumulating in the subsoil (such as in a dark-colored Bhs horizon, h for humic material). Lastly, Orthods are all other Spodosols.
Cryods have a cryic STR; 4. Orthods have a spodic horizon enriched with both iron and organic matter. These are the most extensive Spodosols (2.7 million km 2) and are dominant in cool temperate areas of the northern latitudes.
Spodosols. A black, reddish-brown to dark-brown subsoil (spodic) horizon is the primary identifying characteristic of a Spodosol. It is often overlain by a gray to light-gray eluvial horizon. These distinctive and contrasting colors make Spodosols easily identifiable, although there are always exceptions.
Trees are the common vegetation, which were mostly coniferous in native stands. These soils’ most distinguishing feature is the bright red horizon immediately underlying the white, leached horizon. Spodosol suborders. There’s one Spodosol suborder in Minnesota: Orthods. Orthods. Orthods are forested soils with a sandy texture.
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Apr 7, 2022 · 14.4 Summary. Entisols, Vertisols, Spodosols, and Histosols collectively comprise 4,198 km 2, which is 3.0% of the mapped soil area of Oregon. Entisols are poorly developed, lack a diagnostic subsurface horizon, and are more extensive in the Columbia Basin, the Malheur High Plateau, and the Sitka Spruce Belt.
