LOCATION RIGDON GAEstablished Series
TAXONOMIC CLASS: Sandy, siliceous, thermic Oxyaquic Alorthods
TYPICAL PEDON: Rigdon sand - wooded. (Colors are for moist soil.)
A--0 to 7 inches; very dark gray (10YR 3/1) rubbed, sand; weak fine granular structure; very friable; many fine and medium roots; gray (10YR 6/1) uncoated sand grains mixed with coated sand gives salt-and-pepper appearance; very strongly acid; clear wavy boundary. (4 to 12 inches thick)
Bh--7 to 11 inches; mottled dark brown (7.5YR 3/2) and dark reddish brown (5YR 3/3) sand; massive in place, crushes to weak fine granular structure; firm; common medium and fine roots; most sand grains coated with organic matter; very strongly acid; gradual wavy boundary. (4 to 11 inches thick)
B/E--11 to 15 inches; mottled brown (7.5YR 4/2) and pale brown (10YR 6/3) sand; massive in place, crushes to weak fine granular structure; friable; few fine roots; very strongly acid; gradual wavy boundary. (2 to 10 inches thick)
E1--15 to 27 inches; pale yellow (2.5Y 7/4) sand; single grained; loose; few fine roots; common medium prominent strong brown (7.5YR 5/8) masses of iron accumulation; very strongly acid; gradual wavy boundary.
E2--27 to 38 inches; pale yellow (2.5Y 7/4) sand; single grained; loose; common medium distinct light gray (10YR 7/2) iron depletions; common medium prominent yellowish brown (10YR 5/8) masses of iron accumulation; very strongly acid; gradual wavy boundary. (Combined thickness of E horizon is l0 to 28 inches.)
Btg1--38 to 44 inches; light gray (10YR 7/2) sandy loam; weak fine granular structure; very friable; sand grains coated with clay; common medium distinct yellowish brown (10YR 5/6) and pale yellow (2.5Y 7/4) masses of iron accumulation; very strongly acid; gradual wavy boundary. (4 to 24 inches thick)
Btg2--44 to 80 inches; light gray (10YR 7/2) sandy loam; weak medium subangular blocky structure; friable; sand grains bridged with clay; few faint clay films on faces of peds and in pores; 2 percent plinthite; common medium prominent brownish yellow (10YR 6/6) and strong brown (7.5YR 5/6) and few fine prominent yellowish red (5YR 5/6) masses of iron accumulation; strongly acid.
TYPE LOCATION: Bacon County, Georgia; about 3/4 mile south of junction of highways US 1 and US 23, east on graded road 2.5 miles, 50 feet south of road.
RANGE IN CHARACTERISTICS:
Depth to the top of the Argillic: 24 to 40 inches
Depth to Bedrock: Greater than 60 inches
Depth to Seasonal High Water Table: 18 to 30 inches, December to May. The water table is at depths of 18 to 30 inches for 4 to 6 months, and at depths of more than 30 inches 6 to 8 months during most years. It is at depths of 10 to 15 inches for short periods after heavy rains
Soil Reaction: extremely acid to strongly acid, except where limed
RANGE OF INDIVIDUAL HORIZONS:
A or Ap horizon (if it occurs):
Color--hue of 10YR or 5Y, value of 2 to 4, and chroma of 1 or 2, or it has a hue of 2.5Y, value of 2 to 4, and chroma of 0, or value of 3 or 4 and chroma of 2
Texture (fine-earth fraction)-- sand, fine sand, or loamy sand
E horizon (if it occurs):
Color--hue of 10YR to 5Y, value of 5 to 7, and chroma of 1 to 4
Texture (fine-earth fraction)-- sand, fine sand, or loamy sand
Other features-less than 2 inches thick
Bh horizon:
Color--hue of 5YR, value of 2 to 4, and chroma of 1 or 2 or value of 3 or 4, and chroma of 3 or 4; hue of 7.5YR, value of 3 or 4, and chroma of 2 or 4; hue of 10YR, value of 2 or 3, and chroma of 1, 2 or 3
Texture (fine-earth fraction)-- sand, fine sand, or loamy sand
Other features-- most sand grains are coated with organic matter
B/E horizon:
Color-hue of 5YR or 7.5YR, value of 2 to 4, and chroma of 1 to 4 in the B part, and hue of 10YR to 5Y, value of 5 to 8 and chroma of 3 to 6 in the E part
Texture (fine-earth fraction)-- sand, fine sand, or loamy sand
Other features-- most sand grains in the B part are coated with organic matter
E or E' horizon:
Color--hue of 10YR to 5Y, value of 5 to 8, and chroma of 3 to 6, with chroma of 1 or 2 in the lower part in some pedons
Texture (fine-earth fraction)-- sand, fine sand, loamy sand, or loamy fine sand
Redoximorphic features-few to many iron masses in shade of red, yellow, or brown and iron depletions in shades of brown, yellow, olive, or gray
Bt horizon (if it occurs):
Color--hue of 10YR to 5Y, value of 6 or 7, and chroma of 3 or 4
Texture (fine-earth fraction)-- sandy clay loam, sandy loam, or fine sandy loam
Redoximorphic features-few to many iron masses in shade of red, yellow, or brown and iron depletions in shades of brown, yellow, olive, or gray. Some pedons are mottled in these colors.
Other features-- Plinthite is less than 3 percent
Btg horizon:
Color--hue of 10YR or 5Y, value of 6 or 7, and chroma of 1 or 2; or hue of 2.5Y, value of 6 or 7, and chroma of 2
Texture (fine-earth fraction)-- sandy clay loam, sandy loam, or fine sandy loam
Redoximorphic features-few to many iron masses in shade of red, yellow, or brown and iron depletions in shades of brown, yellow, olive, or gray. Some pedons are mottled in these colors.
Other features-- Plinthite is less than 3 percent
COMPETING SERIES:
Echaw soils -- do not have an argillic horizon
Hurricane soils-- do not have an argillic horizon
Mandarin soils-- do not have an argillic horizon
Melvina soils -- are underlain by limestone
Ridgeland soils-- do not have an argillic horizon
GEOGRAPHIC SETTING:
Landscape: Coastal Plain
Landform: upland flats
Geomorphic Component: talfs
Parent Material: marine sediments
Elevation: 50 to 350 feet
Mean Annual Air Temperature: 59 to 70 degrees
Mean Annual Precipitation: 38 to 52 inches
Frost Free Period: 190 to 275 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Echaw soils-- do not have an argillic horizon
Leefield soils -- do not have Bh horizons
Macotte soils-- are poorly drained
Olustee soils-- are poorly drained and do not have an E horizon below the B horizon with a matrix color of chroma 3 or higher
Pelham soils-- do not have Bh horizons
Plummer soils-- do not have Bh horizons
Sapelo soils-- have an argillic horizon beginning at a depth greater than 40 inches
Seagate soils-- have an E horizon 3 or more inches thick separating the A and Bh horizons and have a sandy over loamy particle-size control section
Surrency soils-- do not have Bh horizons
DRAINAGE AND PERMEABILITY:
Drainage Class (Agricultural): somewhat poorly drained
Internal Free Water Occurrence: shallow to moderately deep, transitory to common.
Index Surface Runoff: Low
Permeability: moderate
USE AND VEGETATION:
Major Uses: cropland and forest
Dominant Vegetation: Where cultivated-- corn, soybeans, tobacco, truck crops, and small grains. Where wooded-- slash, loblolly, and longleaf pine.
DISTRIBUTION AND EXTENT:
Distribution: Georgia and possibly Florida, North Carolina, and South Carolina
Extent: moderate
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Bacon County, Georgia, 1983. Source of the name is a small stream near the type location. The alternate name is Bacon.
REMARKS: Rigdon soils were formerly included in the Olustee series.
Diagnostic horizons recognized in this pedon are:
Ochric epipedon - the zone from the surface to approximately 7 inches (A horizon).
Spodic horizon - the zone from approximately 7 to 11 inches (Bh horizon).
Argillic horizon - the zone from approximately 38 to 80 inches (Btg1 and Btg2 horizons).
ADDITIONAL DATA:
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation GA0084 RIGDON 0- 2 59- 70 190-275 38- 52 50- 350SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness GA0084 NONE 1.5-2.5 APPARENT FEB-JUL 60-60
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- GA0084 0- 7 S FS LS 0- 0 100-100 1- 8 - GA0084 7-15 S FS LS 0- 0 100-100 2- 8 - GA0084 15-38 S FS LS 0- 0 100-100 2- 8 - GA0084 38-80 SL SCL 0- 0 100-100 15-35 -
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll GA0084 0- 7 4.5- 6.0 2.-4. 0- 0 6.0- 20 LOW GA0084 7-15 3.6- 5.5 - 0- 0 0.6- 2.0 LOW GA0084 15-38 4.5- 5.5 - 0- 0 6.0- 20 LOW GA0084 38-80 4.5- 5.5 - 0- 0 0.6- 2.0 LOW