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Ortstein horizons are generally reddish brown to very dark reddish brown in color. Usually Ortstein Humic Podzols have L, F, and H or O horizons and an Ae horizon. They may have mottling that indicates gleying at any depth within the control section and placic or duric horizons or a fragipan.
Common horizon sequence: LFH, Ae, Bfc, Bfj, C. These soils have the general properties specified for the Podzolic order and the Humo-Ferric Podzol great group. They differ from Orthic Humo-Ferric Podzols by having an ortstein horizon at least 3 cm thick.
Ortstein horizon: This strongly cemented Bhc, Bhfc or Bfc horizon is at least 3 cm thick and occurs in more than one-third of the exposed face of the pedon. Ortstein horizons are generally reddish brown to very dark reddish brown. Permafrost: Permanently frozen (i.e., soil temperatures less than 0 °C) ground.
Although duric and fragipan horizons are not restricted to the Podzolic order, they are considered jointly with ortstein and placic horizons in order to highlight the similarities, differences, and modes of genesis of the four types of cemented horizons in Canadian soils.
May 1, 2011 · From a weight-of-evidence assessment, ortstein is cemented by Al-organic complexes and short-range-order compounds, and placic horizons are cemented by Fe as ferrihydrite or as Fe-organic complexes. Soils with ortstein cover 2.2 million ha in the USA, 87% of which occur in Michigan and Florida.
- James Bockheim
- 2011
Soils bearing ortstein and placic horizons are used for cran- berry and blueberry ( Vaccinium spp.) culture, truck crops, and forestry operations but have many limitations for other kinds of land use.
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May 1, 2011 · From a weight-of-evidence assessment, ortstein is cemented by Al-organic complexes and short-range-order compounds, and placic horizons are cemented by Fe as ferrihydrite or as Fe-organic complexes. Ortstein horizons are relatively common in the USA, but placic horizons are less common.
