 |
Orthic Brown Chernozemic soils
Brown Chernozemic soils are associated with xerophytic grasses and forbs
or with mixed grass and forb vegetation. They are the zonal soils of the
Boreal subarid climate in the prairie region. Most of the Brown Chernozemic
soils are in the southern parts of Saskatchewan and Alberta and some in
the southern plateau of interior British Columbia.
Estimated area of mapping units with Brown Chernozemic soils as dominant is about 100,230 km2 or roughly 1.1% of the land area of Canada. These soils are developed mainly on weakly to moderately calcareous glacial tills, and lacustrine and fluvial deposits. Some are also found on aeolian, alluvial and colluvial materials.
Selected properties:
1. Chernozemic Ah horizon with color value darker than 3.5 (moist) and
4.5-5.5 (dry).
2. B horizon (Bm, Btj, Bt) at least 5 cm thick that does not contain alkaline earth carbonates 3. Lack an eluvial horizon (Ahe, Ae, Aej) at least 2 cm thick. 4. Do not have Bnjtj 5. Do not have evidence of gleying Common Horizon Sequence:Ah, Bm or Btj, Cca or Ck |