LOCATION ICHETUCKNEE FL
Established Series
Rev. GRB
10/2018
ICHETUCKNEE SERIES
The Ichetucknee series consists of deep, somewhat poorly drained, very slowly permeable soils that formed in sandy and clayey marine deposits overlying limestone. They are on small knolls and side slopes of the Coastal Plain uplands. Near the type location, the mean annual temperature is about 68 degrees F., and the mean annual precipitation is about 57 inches. Slopes range from 2 to 8 percent.
TAXONOMIC CLASS: Fine, mixed, active, thermic Albaquultic Hapludalfs
TYPICAL PEDON: Ichetucknee fine sand--planted pines (Colors are for moist soil).
Ap--0 to 5 inches; gray (10YR 5/1) fine sand; weak fine granular structure; very friable; common fine roots; nonsticky, nonplastic; very strongly acid; gradual wavy boundary. (2 to 5 inches thick)
E--5 to 13 inches; light gray (10YR 7/2) fine sand; weak fine granular structure; very friable; common fine roots; nonsticky, nonplastic; common medium faint very pale brown (10YR 7/4) masses of iron accumulation; strongly acid; abrupt wavy boundary. (2 to 14 inches thick)
Bt1--13 to 39 inches; pale brown (10YR 6/3) clay; moderate medium subangular blocky structure; very firm; moderately sticky, moderately slightly plastic; few faint clay films on faces of peds; common fine roots; many fine prominent red (2.5YR 4/6) and common fine distinct brownish yellow (10YR 6/6) masses of iron accumulation; few fine faint gray (10YR 5/1) areas of iron depletions; strongly acid; clear wavy boundary.
Bt2--39 to 55 inches; yellowish red (5YR 5/6) clay; strong medium subangular blocky structure; very firm; very sticky, very slightly plastic; common faint clay films on faces of peds; slightly acid; abrupt irregular boundary. (Combined thickness of the Bt horizons ranges from 21 to 55 inches)
R--55+ inches; very pale brown (10YR 8/2) soft limestone; about 40 percent, by volume, hard limestone boulders; solution holes filled with clay comprise about 10 percent of the pedon; strongly alkaline.
TYPE LOCATION: Columbia County, Florida. Approximately 0.75 mile southeast of intersection of Florida State Roads 247 and 240, about 0.5 mile south of State Road 240, and about 50 feet east of Mary Road. NE 1/4, SE 1/4, sec. 14, T. 5 S., R. 15 E. O'Brian SE Florida 7.5 Minute Quadrangle; lat 30 degrees 03 minutes 11 seconds N.; long 82 degrees 47 minutes 10 seconds W.
RANGE IN CHARACTERISTICS: Thickness of the solum over limestone ranges from 40 to 60 inches. Soil reaction ranges from very strongly acid to strongly acid in the A and E horizons, strongly acid to moderately acid in the upper part of the Bt horizon, and moderately acid to neutral in the lower part of the Bt horizon.
The A or Ap horizon has hue of 10YR, value of 3 to 5, and chroma of 1 or 2. Texture is fine sand, sand, loamy fine sand, or loamy sand.
The E horizon has hue of 10YR, value of 4 to 7, and chroma of 2 to 4. Redoximorphic features in shades of gray, yellow, and brown range from none to common. Texture is fine sand, sand, loamy fine sand, or loamy sand.
The Bt horizon has hue of 5YR through 10YR, value of 5 to 7, and chroma of 3 to 6. The lower part of the Bt horizon has the same hues and values as the upper part but includes chroma of 1 or 2. Redoximorphic features in shades of gray, brown, yellow, or red range from few to many. Texture is sandy clay or clay. Small limestone nodules and fragments range from none to common in the lower portion of the Bt horizon.
The Bt horizon has hue of 5YR through 10YR, value of 5 to 7, and chroma of 3 to 6. The lower part of the Bt horizon has the same hues and values as the upper part but includes chroma of 1 or 2. Redoximorphic features in shades of gray, brown, yellow, or red range from few to many. Texture is sandy clay or clay. Small limestone nodules and fragments range from none to common in the lower portion of the Bt horizon.
The R or 2R horizon is composed of soft limestone that is rippable by power equipment. It is interspersed with hard limestone fragments or boulders. Solution holes up to 30 inches in diameter and ranging from few to many are filled with clay and extending to depths of 75 inches or more.
COMPETING SERIES: The
Spurger series is the only known soil in the same family. The moderately well drained Spurger soils lack a lithic or paralithic contact within 60 inches of the soil surface.
GEOGRAPHIC SETTING: Ichetucknee soils are on uplands of the Coastal Plain. They formed in sandy and clayey marine sediments overlying limestone. The climate is humid subtropical. Slopes range from 2 to 8 percent. The climate is humid subtropical. The average annual air temperature ranges from 67 to 69 degrees F., and the average annual precipitation ranges from 55 to 59 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the
Albany,
Blanton,
Bonneau,
Goldsboro, and
Surrency series. All these soils lack lithic or paralithic contacts within 60 inches of the surface. Albany and Blanton soils have sandy surface and subsurface 40 to 80 inches thick. In addition, Blanton soils are moderately well drained to somewhat excessively well drained. Bonneau and Surrency soils have sandy surface and subsurface horizons 20 to 40 inches thick. In addition, Bonneau soils are well drained and Surrency soils are very poorly drained. The moderately well drained Goldsboro soils have fine-loamy control sections.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; rapid permeability in the A and E horizons, and slow or very slow permeability in the Bt horizons.
USE AND VEGETATION: Most areas of Ichetucknee soils are used for timber or pasture. The native vegetation includes slash pine, longleaf pine, mockernut hickory, laurel oak, water oak, sweetgum, black cherry, tree sparkleberry, wild grape, and blackberry.
DISTRIBUTION AND EXTENT: Northern peninsular Florida and possibly southern Georgia. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama.
SERIES ESTABLISHED: Columbia County. Florida; 1981.
REMARKS: Diagnostic horizons and features recognized in this pedon:
Ochric epipedon - The zone from the surface to about 13 inches (A and E horizons).
Argillic horizon - The zone from about 13 inches to about 55 inches (Bt1 and Bt2 horizons).
Lithic contact - Approximately 55 inches (R horizon).
A perched water table is usually between depths of 1.5 to 3.0 feet for periods of 1 to 4 months during most years. Much of this wetness is due to seepage from sloping areas.
This soil was formerly mapped as a variant of the Susquehanna series.
ADDITIONAL DATA: Characterization pedon - S12-4-(1-4). Sample by the Soil Characterization Lab, IFAS, Univ. of Florida, Gainesville. Sampled 7/77.
National Cooperative Soil Survey
U.S.A.