logic soil group. The four hydrologic soil groups (HSGs) are described as: Group A—Soils in this group have low runoff poten-tial when thoroughly wet. Water is transmitted freely through the soil. Group A soils typically have less than 10 percent clay and more than 90 percent sand or gravel and have gravel or sand textures. Some soils
Within Soil Series and Map Units, there are multiple HSGs that are applicable. The scale of the map also impacts the accuracy of HSGs assigned to an area. Site-specific soil investigations may yield different results, impacting stormwater management design and costs.
Soil - FAO Groups, Texture, Structure | Britannica
Sep 25, 2024 · The FAO designates eight soil groups—Cambisol, Chernozem, Fluvisol, Gleysol, Kastanozem, Phaeozem, Umbrisol, and Vertisol—as having a high inherent soil fertility. They constitute 31 percent of the total land area.
USDA soil taxonomy - Wikipedia
The soil great group category is a subdivision of a suborder in which the kind and sequence of soil horizons distinguish one soil from another. About 185 great groups are recognized in the United States.
Soil Classification | Natural Resources Conservation Service
The Soil Taxonomy Forum is an online discussion site for the soil classification system. It is sponsored by USDA-NRCS and hosted by Virginia Tech University. The Forum encourages open discussion of topics related to soil classification, soil description, diagnostic soil properties and qualities of soil, taxonomic classes, and ideas to improve ...
Soil - Texture, Structure, Composition | Britannica
Sep 25, 2024 · The two principal systems of soil classification in use today are the soil order system of the U.S. Soil Taxonomy and the soil group system, published as the World Reference Base for Soil Resources, developed by the Food and Agriculture Organization (FAO) of …
Global Hydrologic Soil Groups (HYSOGs250m) for Curve …
Apr 22, 2020 · This dataset - HYSOGs250m - represents a globally consistent, gridded dataset of hydrologic soil groups (HSGs) with a geographical resolution of 1/480 decimal degrees, corresponding to a projected resolution of approximately 250-m.
Soil classification | FAO SOILS PORTAL | Food and Agriculture ...
Soil Classification concerns the grouping of soils with a similar range of properties (chemical, physical and biological) into units that can be geo-referenced and mapped. Soils are a very complex natural resource, much more so than air and water.
World Reference Base for Soil Resources (WRB) | ISRIC
WRB is a two-tier system of soil classification, with 32 Major Soil Groups (the “Reference Base”) and over 120 uniquely defined qualifiers for specific soil characteristics (the “WRB Classification System”).
Abstract: The hydrologic soil group (HSG) classification system places soils into groups based on their runoff producing characteristics under storm events and ground cover conditions.