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Examples include andic soil properties, episaturation, and identifiable secondary carbonates. A significant number of the terms included in this glossary are words that can be found in a common dictionary, but that have specific unique meanings in the context of soil survey and soil classification.
Soil structure refers to the aggregation of primary soil particles into compound particles that are separated from adjoining aggregates by surfaces of weakness. Soil structure is classified in terms of grade or distinctness (weak, moderate, strong), class or size (fine, medium, coarse, very coarse), and type (granular, platy, prismatic, blocky).
May 1, 2011 · According to Soil Taxonomy (ST), ortstein consists of spodic materials and occurs in a layer that is ≥25 mm thick and ≥50% cemented (Fig. 1A-1C; 34). In ST, ortstein is both a diagnostic subsurface horizon and the only rupture-resistance class recognized in the system.
Rationale of Soil Taxonomy in Canada. The nature of soil. 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.
Soil surveys use Soil Taxonomy to provide: A connotative naming system that enables those users familiar with the nomenclature to remember selected properties of soils. A means for understanding the relationships among soils within a given area and in different areas.
Taxonomic Classification of the Soils. The system of soil classification used by the National Cooperative Soil Survey has six categories (Soil Survey Staff, 1999 and 2003). Beginning with the broadest, these categories are the order, suborder, great group, subgroup, family, and series.
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Soil Taxonomy is a quantitative system based on soil properties that can be observed or measured, organized in a hierarchy based on six categories beginning with 12 broad soil orders and narrowing in specificity to more than 23,000 series. The following diagram illustrates the organization of a taxonomic name by category.
