In dictionaries:
Unified Soil Classification System
a soil classification system used in engineering and geology to describe the texture and grain size of a soil.
AASHTO Soil Classification System
developed by the American Association of State Highway and Transportation Officials, and is used as a guide for the classification of soils and soil-aggregate mixtures for highway construction purposes.
Australian Soil Classification
the classification system currently used to describe and classify soils in Australia.
FAO soil classification
The Food and Agriculture Organization of the United Nations developed a supra-national classification, which offers useful generalizations about pedogenesis in relation to the interactions between the main soil-forming factors.
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