LOCATION COOSAW SC+GA VAEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, semiactive, thermic Aquic Arenic Hapludults
TYPICAL PEDON: Coosaw loamy fine sand--cultivated. (Colors are for moist soil.)
Ap--0 to 5 inches; dark gray (10YR 4/1) loamy fine sand; weak fine granular structure; very friable; many fine and common medium roots; very strongly acid; clear smooth boundary. (4 to 12 inches thick)
E1--5 to 17 inches; very pale brown (10YR 7/3) loamy fine sand; common medium faint light brownish gray (2.5Y 6/2) mottles; weak fine granular structure; very friable; common fine and common medium roots; strongly acid; clear wavy boundary.
E2--17 to 32 inches; light gray (2.5Y 7/2) fine sand; many medium faint light gray (10YR 7/1) Fe depletions and few fine distinct very pale brown (10YR 7/3) Fe depletions; weak medium subangular blocky structure parting to weak fine granular; very friable; few fine and few medium roots; strongly acid; clear smooth boundary. (Combined thickness of the E horizon is 12 to 30 inches thick)
Bt1--32 to 35 inches; light yellowish brown (10YR 6/4) fine sandy loam; many medium faint brownish yellow (10YR 6/6), common medium distinct yellowish brown (10YR 5/6) Soft masses of Fe accumulation, and few fine distinct light brownish gray (10YR 6/2) Fe depletions; weak medium subangular blocky structure; very friable; sand grains coated and bridged with clay; common fine lenses of light gray fine sand; very strongly acid; clear wavy boundary.
Bt2--35 to 47 inches; strong brown (7.5YR 5/6) sandy clay loam; many medium distinct gray (10YR 6/1) Fe depletions, common medium distinct brownish yellow (10YR 6/6) and common medium distinct red (2.5YR 4/6) soft masses of Fe accumulation; weak medium subangular blocky structure; friable; few faint clay films on faces of some peds; few fine roots; very strongly acid; gradual wavy boundary.
Btg--47 to 56 inches; gray (10YR 6/1) sandy clay loam; many medium prominent red (2.5YR 4/6) and common medium distinct brownish yellow (10YR 6/6) soft masses of iron accumultion; weak medium subangular blocky structure; friable; few faint thin clay films on faces of some peds; very strongly acid; gradual wavy boundary. (Combined thickness of the Btg horizon is 24 to more than 48 inches thick)
BCg1--56 to 66 inches; light gray (10YR 7/2) sandy loam; many medium distinct reddish yellow (5YR 6/8), and many medium distinct brownish yellow (10YR 6/6), and few medium prominent red (2.5YR 5/8) soft masses of Fe accumulation; weak medium subangular blocky structure; friable; thin strata of sandy clay loam; few fine flakes of mica; very strongly acid; gradual wavy boundary.
BCg2--66 to 72 inches; light gray (10YR 7/2) sandy clay loam; many medium distinct brownish yellow (10YR 6/6), common medium prominent red (2.5YR 5/8), and common medium distinct yellowish red (5YR 5/8) soft masses of Fe accumulation; weak medium subangular blocky structure; very friable; strata of fine sandy loam; few fine flakes of mica; very strongly acid; clear wavy boundary. (Combined thickness of the BCg horizon is 10 to more than 30 inches.)
Cg--72 to 99 inches; light gray (10YR 7/1) loamy fine sand; many medium distinct light yellowish brown (2.5Y 6/4) and many medium distinct brownish yellow (10YR 6/6), and few medium distinct yellowish brown (10YR 5/6) soft masses of iron accumulation; massive; very friable; strata of fine sandy loam; common fine flakes of mica; very strongly acid.
TYPE LOCATION: Colleton County, South Carolina; 3.8 miles southwest of Green Pond to intersection of U. S. Highway 17 and secondary road 119; site is 200 feet west of centerline of intersection.
RANGE IN CHARACTERISTICS:
Depth to Bedrock: Greater than 72 inches
Depth to Seasonal High Water Table: 24 to 36 inches, December to March
Soil Reaction: very strongly acid to slightly acid in the A horizon and upper part of the B horizon, and very strongly acid or strongly acid throughout the rest of the profile, except where limed
Other Features: mineralogy of the clay fraction is mixed
RANGE OF INDIVIDUAL HORIZONS:
A or Ap horizon (if it occurs):
Color--hue of 10YR or it is neutral, value of 3 to 5, and chroma of 0 to 3
Texture (fine-earth fraction)-- loamy fine sand, loamy sand, fine sand, or sand
E horizon:
Color--hue of 10YR to 5Y, value of 6 to 8, and chroma of 1 to 4
Texture (fine-earth fraction)-- loamy fine sand, loamy sand, fine sand, or sand
BA horizon (if it occurs):
Color--hue of 7.5YR to 2.5Y, value of 5 to 7, and chroma of 3 to 8
Texture (fine-earth fraction)-- sandy loam or fine sandy loam
Redoximorphic features (if they occur)--iron masses in shade of red, yellow, or brown and iron depletions in shades of brown, yellow, olive, or gray
Bt horizon:
Color--hue of 10YR or 7.5YR, value of 4 to 6, and chroma of 4 to 8
Texture (fine-earth fraction)-- sandy clay loam, fine sandy loam, or sandy loam
Redoximorphic features (if they occur)--iron masses in shade of red, yellow, or brown and iron depletions in shades of brown, yellow, olive, or gray
Other Feature: average clay content of 18 to 35 percent in the upper 20 inches of the argillic horizon
Btg horizon:
Color--hue of of 10YR to 5Y, value of 4 to 7, and chroma of 1 or 2
Texture (fine-earth fraction)-- sandy clay loam or sandy loam but ranges to sandy clay in some pedons
Redoximorphic features (if they occur)--iron masses in shade of red, yellow, or brown and iron depletions in shades of brown, yellow, olive, or gray
BCg horizon:
Color--hue of of 10YR to 5Y, value of 4 to 7, and chroma of 1 or 2
Texture (fine-earth fraction)-- fine sandy loam, loamy fine sand, or sand, or they are stratified sandy clay loam, sandy clay, fine sandy loam, loamy fine sand, or sand
Redoximorphic features (if they occur)--iron masses in shade of red, yellow, or brown and iron depletions in shades of brown, yellow, olive, or gray
Cg horizon:
Color--hue of of 10YR to 5Y, value of 4 to 7, and chroma of 1 or 2
Texture (fine-earth fraction)-- fine sandy loam, loamy fine sand, or sand, or they are stratified sandy clay loam, sandy clay, fine sandy loam, loamy fine sand, or sand
Redoximorphic features (if they occur)--iron masses in shade of red, yellow, or brown and iron depletions in shades of brown, yellow, olive, or gray
COMPETING SERIES:
Tomahawk soils-- have a Bt horizon underlain by a Bh horizon
GEOGRAPHIC SETTING:
Landscape: Lower Coastal Plain
Landform: marine terrace
Geomorphic Component: tread, talf
Parent Material: marine deposits
Elevation: 4 to 40 feet
Mean Annual Air Temperature: 62 to 66 degrees
Mean Annual Precipitation: 42 to 50 inches
Frost Free Period: 220 to 250 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Chisolm soils-- do not have gray mottles within 40 inches of the soil surface, on adjacent higher positions
Eddings soils-- on higher landscapes and have a grossarenic epipedon
Hobcaw soils-- are on nearby landscapes and are very poorly drained
Murad soils-- are on adjacent landscapes and have a grossarenic epipedon
Williman soils-- are on adjacent landscapes and are poorly drained
Yauhannah soils-- are on nearby landscapes and have an argillic horizon within 20 inches of the surface
Yemassee soils-- are on nearby landscapes and have an argillic horizon within 20 inches of the surface
DRAINAGE AND PERMEABILITY:
Drainage class (Agricultural): moderately well drained
Index Surface Runoff: negligible to low
Internal Free Water Occurrence: moderately deep, common
Permeability: moderate
USE AND VEGETATION:
Major Uses: cropland, forest
Dominant Vegetation: Where cultivated-- corn, soybeans, vegetables, small grain, or pasture. Where wooded-- loblolly, slash, and longleaf pines, few oaks, and a few blackgum with an understory of wax myrtle, gallberry, palmetto, and wiregrass ground cover.
DISTRIBUTION AND EXTENT:
Distribution: Lower Coastal Plain of South Carolina, Georgia, and Virginia
Extent: moderate
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Beaufort County, South Carolina; 1975.
REMARKS: The classification was revised to Aquic Arenic Hapludults to reflect the changes in the seventh edition to Soil Taxonomy.
Diagnostic horizons and soil characteristics recognized in this pedon are:
Ochric epipedon--the zone from 0 to 32 inches (Ap and E horizons)
Arenic feature--the zone from 0 to 32 inches ( ap and E horizon)
Argillic horizon--the zone from 32 to 47 inches (Bt horizons)
Aquic conditions--the soil has redox depletions and concentrations within the upper 24 inches of the argillic horizon, with periodic saturation and reduction at some time during the year
Series control section--the zone from 0 to 60 inches
ADDITIONAL DATA: Petrographic, particle-size, and engineering test data are on file for this pedon
Data Map Unit ID (type location):
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation SC0031 COOSAW 0- 2 62- 66 220-250 42- 50 5- 40SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness SC0031 NONE 2.0-3.0 APPARENT DEC-MAR 60-60
Depth Texture 3-Inch No-10 Clay% -CEC- 0-32 FS S 0- 0 100-100 2-10 1- 4 0-32 LFS LS 0- 0 100-100 5-12 1- 4 32-35 SL FSL 0- 0 95-100 15-20 2- 5 35-72 SCL FSL SL 0- 0 95-100 18-35 2- 6 72-99 FSL LFS S 0- 0 95-100 2-20 1- 3
Depth -pH- O.M. Salin Permeab Shnk-Swll 0-32 4.5- 6.0 .5-2. 0- 0 6.0- 20 LOW 0-32 4.5- 6.0 .5-2. 0- 0 6.0- 20 LOW 32-35 4.5- 6.0 0.-.5 0- 0 2.0- 6.0 LOW 35-72 4.5- 5.5 0.-.5 0- 0 0.6- 2.0 LOW 72-99 4.5- 5.5 0.-.5 0- 0 2.0- 6.0 LOW