Mottling and gleying remain important characteristics for the classification of soils in Canada. The development of criteria for the morphological description of these redoximorphic soil features, for soil horizon nomenclature, for the taxonomy of gleysolic and gleyed soils, as well as for soil drainage classification, began in the mid-1940s and continued for the next four decades. Despite advancements elsewhere, notably with Soil Taxonomy and the World Reference Base, there have been minimal refinements made in Canada, during the past quarter century. Various issues are identified, including the need for more succinct and clearer definitions, a revision of standards for the field characterization of redoximorphic features, as well as more consistency in the application of concepts across existing taxa and systems. A taxonomic framework to more effectively reflect redoximorphic features, such as a new “Redoximorphic Phase” is also discussed. Ultimately, it is recommended that a special committee to be established to conduct a thorough study and present recommendations.
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15 December 2022
Rationalizing mottling and gleying in the characterization and classification of Canadian soils
Richard J. Heck,
Daniel D. Saurette,
C. James (Jim) Warren
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Canadian Journal of Soil Science
Vol. 103 • No. 2
June 2023
Vol. 103 • No. 2
June 2023
gleysolic soils
redoximorphic features
soil drainage class
Soil taxonomy
World Reference Base