Swannanoa soil series
A representative soil profile of Swannanoa silty clay loam in North Carolina. Swannanoa soils are very deep, have thick, dark surface layers, and formed from old alluvial deposits on high stream terraces. They occur in mountain valleys of intermountain hills and low mountains predominantly along large flood plains throughout the central and southern parts of Buncombe County. (Soil Survey of Buncombe County, North Carolina; by Mark S. Hudson, Natural Resources Conservation Service)
The Swannanoa series consists of very deep, somewhat poorly drained soils with moderately slow permeability. They formed in old alluvium on high stream terraces, alluvial fans, and toeslopes along the broader stream and river valleys of the Southern Blue Ridge (MLRA 130B). Near the type location, mean annual air temperature is about 56 degrees F., and mean annual precipitation is about 48 inches. Slopes range from 0 to 15 percent.
TAXONOMIC CLASS: Fine, mixed, semiactive, mesic Typic Umbraquults
Depth to bedrock is greater than 6 feet. Solum thickness ranges from 30 to 60 inches or more. Thickness of the alluvium is variable and ranges from 5 to more than 15 feet. Content of rock fragments is less than 15 percent in the A, Ap, E, BA, and BE horizons and the upper part of the Bt horizon; is less than 35 percent in the lower part of the Btg, and BCg horizons, and less than 60 percent in the Cg horizon. Unlimed soils are extremely acid to moderately acid throughout.
USE AND VEGETATION: Most of the acreage is used for growing cultivated crops, pasture and orchards. Crops include corn, tobacco, small grains, hay, fruit and vegetables. Woodland vegetation consists of mixed hardwoods and pines, dominated by oaks, maple, poplar, hemlock and white pine.
DISTRIBUTION AND EXTENT: Southern Blue Ridge (MLRA 130B) of North Carolina, Georgia, Tennessee, and Virginia. This series is of small extent. The Swannanoa series was formerly included with the Dillard or Unison series. However, Dillard soils formed in alluvium on low terraces and are fine-loamy and Unison soils are well drained and occur on high terraces.
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/north_carolina...
For a detailed description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/S/SWANNANOA.html
For acreage and geographic distribution, visit:
casoilresource.lawr.ucdavis.edu/see/#swannanoa
Swannanoa soil series
A representative soil profile of Swannanoa silty clay loam in North Carolina. Swannanoa soils are very deep, have thick, dark surface layers, and formed from old alluvial deposits on high stream terraces. They occur in mountain valleys of intermountain hills and low mountains predominantly along large flood plains throughout the central and southern parts of Buncombe County. (Soil Survey of Buncombe County, North Carolina; by Mark S. Hudson, Natural Resources Conservation Service)
The Swannanoa series consists of very deep, somewhat poorly drained soils with moderately slow permeability. They formed in old alluvium on high stream terraces, alluvial fans, and toeslopes along the broader stream and river valleys of the Southern Blue Ridge (MLRA 130B). Near the type location, mean annual air temperature is about 56 degrees F., and mean annual precipitation is about 48 inches. Slopes range from 0 to 15 percent.
TAXONOMIC CLASS: Fine, mixed, semiactive, mesic Typic Umbraquults
Depth to bedrock is greater than 6 feet. Solum thickness ranges from 30 to 60 inches or more. Thickness of the alluvium is variable and ranges from 5 to more than 15 feet. Content of rock fragments is less than 15 percent in the A, Ap, E, BA, and BE horizons and the upper part of the Bt horizon; is less than 35 percent in the lower part of the Btg, and BCg horizons, and less than 60 percent in the Cg horizon. Unlimed soils are extremely acid to moderately acid throughout.
USE AND VEGETATION: Most of the acreage is used for growing cultivated crops, pasture and orchards. Crops include corn, tobacco, small grains, hay, fruit and vegetables. Woodland vegetation consists of mixed hardwoods and pines, dominated by oaks, maple, poplar, hemlock and white pine.
DISTRIBUTION AND EXTENT: Southern Blue Ridge (MLRA 130B) of North Carolina, Georgia, Tennessee, and Virginia. This series is of small extent. The Swannanoa series was formerly included with the Dillard or Unison series. However, Dillard soils formed in alluvium on low terraces and are fine-loamy and Unison soils are well drained and occur on high terraces.
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/north_carolina...
For a detailed description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/S/SWANNANOA.html
For acreage and geographic distribution, visit:
casoilresource.lawr.ucdavis.edu/see/#swannanoa