Dominant Soil Orders
Source: State Soil Geographic Database (STATSGO) & 1998 Dominant Soil Orders and Suborders-Soil Taxonomy 1998
Map Description:
This polygon map shows the dominant soil order present in each STATSGO map unit. Dominant soil orders were identified as the soil order possessing the largest summed component percentage (largest land area) for each map unit. Soil order concepts for each STATSGO map unit were revised to meet 1998 Soil Taxonomy Concepts. This map can be used to compare the general distribution of different soil orders. Soil order is a group of soils in the broadest category of the the USDA "Soil Taxonomy." The Soil Taxonomy is a basic system of soil classification for making and interpreting soil surveys. There are 12 orders, differentiated by the presence or absence of diagnostic horizons: Alfisols, Andisols, Aridisols, Entisols, Gelisols, Histosols, Inceptisols, Mollisols, Oxisols, Spodosols, Ultisols, and Vertisols. Orders are divided into Suborders and the Suborders are farther divided into Great Groups.

Cautions for this Product:
This map shows data that has been revised from published STATSGO data. The State Soil Geographic (STATSGO) database is made by generalizing detailed soil survey data. The mapping scale is 1:250,000 (1:1,000,000 for Alaska). The level of mapping is designed to be used for broad planning and management uses covering state, regional, and multi-state areas. STATSGO map units average from 7,000 to 60,000 acres in size and have a minimum size of 1,544 acres.

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