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An example of a traditional soil map showing soil mapping units, described soil profiles and legend. In the digital era, soil maps come in various digital vector and raster formats and are used for various applications in geosciences and environmental sciences. In this context, soil maps are only visualizations of the soil resource inventories ...
The name of a map unit is usually named after the dominant component within the mapping unit. [2] For example, the dominant component of the mapping unit LhE—Lily sandy loam, 15 to 35 percent slopes, very stony in the Greenbrier County, West Virginia soil survey is the Lily series, which comprises 80% of the mapping unit.
The most current soil survey data is made available for high end GIS users such as professional consulting companies and universities. Typical information in a published county soil survey includes the following: [1] a brief overview on how to use the survey; a general soil map for comparing the sustainability of large sections of the county
Soils representing smaller areas are ignored in the denomination of the map unit. For codominant and associated soils, it is allowed to use less principal qualifiers than would correspondent to the used map scale level. The use of specifiers is not recommended due to the generalization that is required when making maps. In map legends, the ...
The 106 Soil Units form 26 Soil Groups. The FAO soil map was a very simple classification system with units very broad, but was the first truly international system, and most soils could be accommodated on the basis of their field descriptions. The FAO soil map was intended for mapping soils at a continental scale but not at local scale.
A soil family category is a group of soils within a subgroup and describes the physical and chemical properties which affect the response of soil to agricultural management and engineering applications. The principal characteristics used to differentiate soil families include texture, mineralogy, pH, permeability, structure, consistency, the ...
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USDA soil taxonomy provides the core criteria for differentiating soil map units. This is a substantial revision of the 1938 USDA soil taxonomy which was a strictly natural system. The USDA classification was originally developed by Guy Donald Smith , director of the U.S. Department of Agriculture's soil survey investigations. [ 7 ]