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USDA soil taxonomy (ST) developed by the United States Department of Agriculture and the National Cooperative Soil Survey provides an elaborate classification of soil types according to several parameters (most commonly their properties) and in several levels: Order, Suborder, Great Group, Subgroup, Family, and Series.
The National Cooperative Soil Survey Program (NCSS) in the United States is a nationwide partnership of federal, regional, state, and local agencies and institutions. This partnership works together to cooperatively investigate, inventory, document, classify, and interpret soils and to disseminate, publish, and promote the use of information about the soils of the United States and its trust ...
The Required Characteristics of a fragipan according to the "Keys to USDA soil taxonomy, tenth edition, 2006" are . The layer is 15-cm or more thick; and The layer shows evidence of pedogenesis within the horizon or, at a minimum, on the faces of structural units; and
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
A duripan is a diagnostic soil horizon of the USDA soil taxonomy that is cemented by illuvial silica into a subsurface hardpan. Similar to a fragipan, Petrocalcic Horizon and petrogypsic horizon, it is firmly cemented and restricts soil management. In soil descriptions, they are most often denoted by the symbol Bqm.
Soil survey products include the Web Soil Survey, [28] the NCSS Characterization Database [29] and many investigative reports and journal articles. [30] In 2015 NRCS began broad support of soil health, which incorporates less tillage and more cover crops to reduce erosion and improve the diversity of the soil. [31] Information is maintained in ...
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USDA Natural Resources Conservation Services: USDA NRCS soil data. Can interact with the dataset with Web Soil Survey online mapping tool. Libre Map Project: Online collection of all digital USGS 1:24K scale topographic maps (as well as various other GIS data) covering the United States, available as a free download. NPScape