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Orthic Dark Grey Chernozemic soils
These are the Chernozemic soils where the A horizon is characterized by
"salt and pepper" color. The color is indicative of the eluviation processes
associated to soils under forest vegetation. They occur under mixed vegetation
of trees, shrubs,forb s and grasses in forest-grassland ecotone. The climate
is typically cold to moderately cold Cryoboreal subhumid to humid moisture
regimes. Dark Gray Chernozemic soils are thought to have developed where
trees encroached on grasslands and mainly on calc areous glacial tills
and lacustrine deposits.
Estimated area of mapping units with Dark Gray Chernozemic soils as dominant is about 56,181 km2 or roughly 0.6% of the land area of Canada.
Selected diagnostic properties
1. Chernozemic Ah horizon with color value darker than 3.5 (moist) and
4.5 (dry) and chroma of 1.5 or less (moist).
2. B horizon (Bm, Btj, Bt) at least 5 cm thick that does not contain alkaline earth carbonates 3. May have an eluvial horizon (Ae) of 5 cm thick or less. 4. Do not have Bnjtj 5. Do not have evidence of gleying Common Horizon Sequence:Ahe, Ae, Bm or Btj or Bt, Cca or Ck |