LOCATION STOCKADE FL+NCEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Umbric Endoaqualfs
TYPICAL PEDON: Stockade fine sandy loam on a smooth concave 0.2 percent slope in forest.
(Colors are for moist soil unless otherwise stated.)
A--0 to 12 inches; black (N 2/0) fine sandy loam; weak fine subangular blocky structure; very friable; common fine roots; strongly acid; gradual wavy boundary. (10 to 20 inches thick)
Btg1--12 to 26 inches; very dark gray (10YR 3/1) sandy clay loam; few fine distinct yellowish brown and few fine faint dark grayish brown mottles; weak medium subangular blocky structure; friable; slightly acid; gradual smooth boundary. (8 to 17 inches thick)
Btg2--26 to 46 inches; dark gray (10YR 4/1) sandy clay loam; weak medium subangular blocky structure; few fine brown sand streaks; neutral; friable; clear wavy boundary. (14 to 29 inches thick)
C--46 to 65 inches; dark grayish brown (10YR 4/2) light brownish gray (10YR 6/2) fine sand; moderate medium crumb structure; very friable; neutral.
TYPE LOCATION: Duval County, Florida; 2,000 feet north of Atlantic Boulevard, 1.5 miles west of Girvin Road in NW1/4NE1/4NE1/4 sec. 21, T. 2 S., R. 28 E.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 40 to 60 inches. Soil reaction ranges from strongly acid to slightly acid in the A horizon and moderately acid to moderately alkaline in the Bt and C horizons.
The A horizon has hue of 10YR or neutral, value of 2 or 3, chroma 2 or less. Texture is fine sand, loamy fine sand, fine sandy loam, or loam. If fine sand or loamy fine sand, the horizon is 26 to 50 centimeters thick.
Some pedons have a thin sandy loam or fine sandy loam BAg or BEg horizon with hue 10YR, value of 4 or 5, and chroma of 2 or less.
The Btg horizon has hue of 10YR or neutral, value of 3 to 6, and chroma 2 or less. Some are mottled with brown or yellow. Clay content ranges from 18 to 30 percent; silt content of this horizon is less than 20 percent. Where color value is less than 4, organic matter content is less than 1 percent. Common fine or medium soft calcium carbonate accumulations occur in the lower portion of this horizon in some pedons.
The C horizon has hue of 10YR to 5Y, value 4 to 7, chroma 1 or 2. Texture is dominantly sand or loamy sand but includes stratified sandy clay, sandy clay loam, sandy loam, loamy sand, or sand. Some pedons are underlain with a 2Cg horizon of greenish gray marl.
COMPETING SERIES: There are no series in the same family. The Fellowship, Grifton, Martel, and Stono series are in closely related families. Fellowship and Martel soils have mean annual soil temperature of more than 72 degrees F. In addition, Fellowship and Martel soils have montmorillonitic mineralogy. Grifton soils have siliceous mineralogy and lack an umbric epipedon. Stono soils have a mollic epipedon.
GEOGRAPHIC SETTING: Stockade soils are on level to nearly level, low-lying drainageways and depressions. Slope ranges from 0 to 2 percent. The regolith is a thick bed of loamy marine sediments. Near the type location, average annual precipitation is about 54 inches, and mean annual temperature is about 69 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Grifton, Invershiel, Leon, Meggett, Ortega, Pender, Pottsburg, and Ridgeland series. Grifton and Meggett soils lack an umbric epipedon. Invershiel and Pender soils are better drained. Leon, Pottsburg, and Ridgeland soils have a spodic horizon and lack an argillic horizon. Ortega soils lack an argillic horizon and do not have an umbric epipedon.
DRAINAGE AND PERMEABILITY: Stockade soils are very poorly drained. Permeability is moderately rapid in the A horizon, moderate to moderately rapid in the B horizons, and rapid in the C horizon. The depth of the water table is less than 10 inches or is above the surface for more than 6 months during most years. This soil is subject to frequent flooding for long duration.
USE AND VEGETATION: This soil is in native vegetation of sweetgum, blackgum, wateroak, swamp chestnut oak, scattered pine and cypress, and an understory of cinnamon fern, waxmyrtle, greenbrier, scattered maidencane, and other perennial forbs and shrubs.
DISTRIBUTION AND EXTENT: Northeast Florida and North Carolina. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Duval County, Florida; 1977.
REMARKS: Characterization data by the University of Florida, IFAS, Soil Science Department, shows the A1 horizon to have base saturation of 39 percent and the Bt horizon 67 to 73 percent base saturation. Organic carbon content of Btg1 is 0.31 percent (10YR 3/1). Additional base saturation tests of A1 horizons of other pedons using a field test kit indicate base saturation of less than 50 percent.
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation FL0202 STOCKADE 0- 2 - - - - FL0452 STOCKADE 0- 2 - - - -SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness FL0202 NONE RARE 0-1.0 APPARENT JUN-MAR 60-60 FL0452 FREQ 0-1.0 APPARENT JUN-MAR 60-60
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- FL0202 0-12 FSL L 0- 0 100-100 10-15 - FL0202 0-12 LFS FS 0- 0 100-100 6-12 - FL0202 0-12 MK-L MK-FSL MK-SL 0- 0 100-100 10-15 - FL0202 12-46 SCL FSL 0- 0 100-100 18-30 - FL0202 46-65 VAR - - - -
FL0452 0-12 FSL L 0- 0 100-100 10-15 - FL0452 0-12 LFS FS 0- 0 100-100 6-12 - FL0452 0-12 MK-L MK-FSL MK-SL 0- 0 100-100 10-15 - FL0452 12-46 SCL FSL 0- 0 100-100 18-30 - FL0452 46-65 VAR - - - -
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll FL0202 0-12 4.5- 6.5 3.-6. 0- 0 0.6- 2.0 LOW FL0202 0-12 4.5- 6.5 3.-6. 0- 0 2.0- 6.0 LOW FL0202 0-12 5.6- 8.4 6.-15 0- 0 0.6- 2.0 LOW FL0202 12-46 4.5- 8.4 - 0- 0 0.06- 0.6 LOW FL0202 46-65 - - - 2.0- 20
FL0452 0-12 4.5- 6.5 3.-6. 0- 0 0.6- 2.0 LOW FL0452 0-12 4.5- 6.5 3.-6. 0- 0 2.0- 6.0 LOW FL0452 0-12 4.5- 6.5 6.-15 0- 0 0.6- 2.0 LOW FL0452 12-46 4.5- 8.4 - 0- 0 0.06- 0.6 LOW FL0452 46-65 5.6- 8.4 - - 2.0-20.0