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- These layers are assigned distinctive alphabetic symbols as a form of shorthand for their characteristics. The horizon description system begins by splitting soil horizons into two distinct groups: organic and mineral horizons. Organic horizons are those that contain 17% or more organic carbon; mineral horizons have less than 17% organic carbon.
soilsofcanada.ca/soil-formation/horizons.php
The horizon description system begins by splitting soil horizons into two distinct groups: organic and mineral horizons. Organic horizons are those that contain 17% or more organic carbon; mineral horizons have less than 17% organic carbon.
- Factors
Hans Jenny suggested a slightly different way of considering...
- Processes
The differentiation of the horizons within the soil profile...
- Soil Formation
Soil formation (also termed soil genesis or pedogenesis) is...
- Gleysolic
Gleysolic soils result from prolonged water saturation of...
- Links
The intent for the Field Handbook for the Soils of Western...
- Members
Angela Bedard-Haughn, University of Saskatchewan, Committee...
- Chernozemic
The A horizons (Ah, Ahe, Ahk, Ap, Apk) meet the criteria for...
- Glossary
A: An A horizon is a mineral horizon meaning it contains ≤...
- Factors
- Canadian Shield
- Mountains and Islands
- Prairies
The landscape of this profile extends from Newfoundland on the east coast of Canada, to the majority of Ontario and Manitoba, to northern portions of Saskatchewan and Alberta, to much of the Northwest Territories and Nunavut. 1. In the past, the Canadian interior was covered with massive glaciers. About 15,000 years ago these glaciers receded north...
This profile covers all of British Columbia and the Yukon as well as parts of the Northwest territories and the maritime provinces (excluding Newfoundland). Also known as the Cordilleran and Appalachian Orogens. 1. The Earth beneath our feet is not stationary; in fact, quite the opposite. Huge continental and oceanic plates are constantly moving ac...
The soil profile for the prairies or the Interior Platform, covers the majority of Alberta, Saskatchewan, Manitoba as well as parts of the Northwest Territories, Nunavut, Ontario, Quebec, and Newfo...
The definitions of taxa in the Canadian system are based mainly on the kinds, degree of development, and the sequence of soil horizons and other layers in pedons. Therefore, the clear definition and designation of soil horizons and other layers are basic to soil classification.
Soil taxonomy in Canada is based on properties of the soil. Therefore, there is a need to define soil (as opposed to nonsoil) and the unit of soil being classified. These and the equally basic definitions of soil horizons are given in this chapter.
A: An A horizon is a mineral horizon meaning it contains ≤ 17% organic C (about 30% organic matter) by weight. It forms at or near the surface in the zone of leaching or eluviation of materials in solution or suspension, or of maximum in situ accumulation of organic matter or both.
Nature and purpose of soil classification. Misconceptions about soil taxonomy. Attributes of the Canadian system. Bases of criteria for defining taxa at various categorical levels. Relationship of taxonomic classes to environments. Relationship of the Canadian system to other systems of soil taxonomy. Summary.
SUMMARY. Soils in Canada are classified according to the Canadian System of Soil Classification (CSSC), a formal taxonomic system with a hierarchy of six levels. The highest level in the CSSC, the order, is based on diagnostic horizons that reflect the effects of the dominant soil-forming process.
