Description: Forest productivity is the volume of wood fiber that is the yield likely to be produced by the most important tree species. This number, expressed as cubic feet per acre per year and calculated at the age of culmination of the mean annual increment (CMAI), indicates the amount of fiber produced in a fully stocked, even-aged, unmanaged stand.
This attribute is actually recorded as three separate values in the database. A low value and a high value indicate the range of this attribute for the soil component. A "representative" value indicates the expected value of this attribute for the component. For this attribute, only the representative value is used.
Color: [38, 115, 0, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: center Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 8 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
Description: Site index for common tree species in North Carolina. Site index is (a) A relative measure of forest site quality based on the height (in feet) of the dominant trees at a specific age (usually 25 or 50 years, depending on rotation length). Site index information helps estimate future returns and land productivity for timber and wildlife. (b) Height of a tree at a specified index or base age. Used as an indicator of site quality.Dataset was created using data from NRCS National Soil Survey. Data is based on "soil map units," which NRCS defines as a set of geographic areas for which a common management strategy is suitable. The range in size of a soil map unit varies depending on the level of detail at which the survey was conducted. In a typical survey area, which is mapped at an approximate scale of 1:24000, map units can range from approximately two acres to thousands of acres in size. A map unit is the smallest delineation that appears on a soil map.A map unit is typically composed of one or more “map unit components”. A map unit component is either some kind of soil, or some kind of non-soil entity like “rock outcrop”. For each component of a map unit, a percent composition is recorded. Although map units contain components, those components are not delineated within the map unit. The majority of attributes (such as forest site index) are attributes of a map unit component, and a map unit may be composed of more than one component. We have to somehow come up with a single value to represent a map unit as a whole, from multiple component values. The process of reducing multiple component values to a single value to represent the corresponding map unit is what we refer to as “aggregation”.This dataset uses the aggregation method "Dominant Component," which returns the attribute value associated with the component with the highest percent composition in the map unit. If more than one component shares the highest percent composition, the corresponding "tie-break" rule determines which value should be returned. The "tie-break" rule indicates whether the lower or higher attribute value should be returned in the case of a percent composition tie. This dataset uses the higher attribute value.This dataset uses the most recent soil surveys available as of August 2012.
Value: Prime farmland if protected from flooding or not frequently flooded during the growing season Label: Prime farmland if protected from flooding or not frequently flooded during the growing season Description: Symbol:
Value: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Label: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Description: Symbol:
Value: Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season Label: Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season Description: Symbol:
Value: Prime farmland if subsoiled, completely removing the root inhibiting soil layer Label: Prime farmland if subsoiled, completely removing the root inhibiting soil layer Description: Symbol:
Value: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Label: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Description: Symbol:
Value: Prime farmland if irrigated and reclaimed of excess salts and sodium Label: Prime farmland if irrigated and reclaimed of excess salts and sodium Description: Symbol:
Description: This dataset is a digital soil survey and generally is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. The information was prepared by digitizing maps, by compiling information onto a planimetric correct base and digitizing, or by revising digitized maps using remotely sensed and other information.This dataset consists of georeferenced digital map data and computerized attribute data. The map data are in a state-wide extent format and include a detailed, field verified inventory of soils and miscellaneous areas that normally occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped. The soil map units are linked to attributes in the National Soil Information System relational database, which gives the proportionate extent of the component soils and their properties.
Copyright Text: Soil Survey Staff. Gridded Soil Survey Geographic (gSSURGO) Database for North Carolina. United States Department of Agriculture, Natural Resources Conservation Service. Available online at http://datagateway.nrcs.usda.gov/. 20171127 (FY2018 official release).
Description: This dataset is a digital soil survey and generally is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. The information was prepared by digitizing maps, by compiling information onto a planimetric correct base and digitizing, or by revising digitized maps using remotely sensed and other information.This dataset consists of georeferenced digital map data and computerized attribute data. The map data are in a state-wide extent format and include a detailed, field verified inventory of soils and miscellaneous areas that normally occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped. The soil map units are linked to attributes in the National Soil Information System relational database, which gives the proportionate extent of the component soils and their properties.
Copyright Text: Soil Survey Staff. Gridded Soil Survey Geographic (gSSURGO) Database for North Carolina. United States Department of Agriculture, Natural Resources Conservation Service. Available online at http://datagateway.nrcs.usda.gov/. 20171127 (FY2018 official release).