LOCATION PLACID FL
Established Series
Rev. GRB/CAP/AMS
01/2020
PLACID SERIES
MLRA(s): 154 and 155
Soil Survey Regional Office (SSRO) Responsible: Auburn, Alabama
Depth Class: Very deep
Drainage Class: Very poorly drained
Saturated Hydraulic Conductivity: High to very high
Index Surface Runoff: Negligible
Parent Material: Sandy marine sediments
Slope: 0 to 2 percent
Elevation: 0 to 50 meters (0 to 165 feet)
Mean Annual Air Temperature: 22 degrees C. (72 degrees F.)
Mean Annual Precipitation: 140 centimeters (55 inches)
TAXONOMIC CLASS: Sandy, siliceous, hyperthermic Typic Humaquepts
TYPICAL PEDON: Placid fine sand, in a marsh used for rangeland. (Colors are for moist soil.)
A1--0 to 25 centimeters (0 to 10 inches); black (10YR 2/1) fine sand; moderate medium granular structure; friable; many fine and medium roots; few root channels; few small pockets of dark gray (10YR 4/1) and gray (10YR 5/1) fine sand; very strongly acid; gradual smooth boundary.
A2--25 to 51 centimeters (10 to 20 inches); very dark gray (10YR 3/1) fine sand; weak fine granular structure; very friable; many fine and medium roots; few root channels; common black (10YR 2/1), dark gray (10YR 4/1), and very dark grayish brown (10YR 3/2) narrow tongues and pockets in the lower portion of the horizon; very strongly acid; clear wavy boundary. [Combined thickness of the A horizon is 25 to 61 centimeters (10 to 24 inches) thick]
Cg1--51 to 76 centimeters (20 to 30 inches); gray (10YR 5/1) fine sand; singe grain; loose; few fine roots; few fine faint dark gray (10YR 4/1) and very dark gray (10YR 3/1) masses with more organic carbon than matrix; strongly acid; gradual wavy boundary. [15 to 30 centimeters (6 to 12 inches) thick]
Cg2--76 to 122 centimeters (30 to 48 inches); grayish brown (10YR 5/2) fine sand; single grain; loose; common medium faint very dark gray (10YR 3/1) and very dark grayish brown (10YR 3/2) masses with more organic carbon than matrix; strongly acid; gradual wavy boundary. [30 to 61 centimeters (12 to 24 inches) thick]
Cg3--122 to 203 centimeters (48 to 80 inches); dark grayish brown (10YR 4/2) fine sand; single grain; loose; few fine faint very dark gray (10YR 3/1) masses with more organic carbon than matrix; strongly acid.
TYPE LOCATION: Okeechobee County, Florida; approximately 2.2 miles west of U.S. Highway 441; about 790 feet north and 460 feet west of the southeast corner of Sec. 30, T. 35 S., R. 35 E.; latitude 27 degrees 18 minutes 15.11 seconds N and longitude 80 degrees 51 minutes 44.79 seconds, W; WSG84.
RANGE IN CHARACTERISTICS:
Solum thickness: 25 to 61 centimeters (10 to 24 inches)
Depth to seasonally high water table: 0 to 15 centimeters (0 to 6 inches)
Soil reaction: Extremely acid to slightly acid
Umbric epipedon thickness: 25 to 61 centimeters (10 to 24 inches)
Depth to aquic conditions: 0 to 15 centimeters (0 to 6 inches)
RANGE IN INDIVIDUAL HORIZONS:
A or Ap horizon:
Color--hue of 10YR or 7.5YR, value of 2 or 3 moist, 3 to 5 dry, and chroma of 1 to 3
Texture--fine sand, sand, loamy fine sand, or loamy sand, or their mucky analogs
Reaction--extremely acid to slightly acid
EC (mmhos/cm)--0 to 2
Some pedons have up to 8 centimeters (3 inches) of muck on the surface.
C or Cg horizon:
Color--hue pf 10YR. 2.5Y, or 5Y, value of 4 to 8, and chroma of 1 to 3
Texture--fine sand, sand, loamy fine sand, or loamy sand
Reaction--extremely acid to slightly acid
EC (mmhos/cm)--0 to 2
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landscape: Southern Florida Flatwoods
Landform(s): Low broad flats, depressions, drainageways, and floodplains
Parent Material: Sandy marine sediments
Mean annual air temperature: 20 to 25 degrees C (68 to 77 degrees F)
Mean annual precipitation: 112 to 155 centimeters (44 to 61 inches)
GEOGRAPHICALLY ASSOCIATED SOILS:
Basinger soils--lack umbric epipedons, have a spodic horizon, and are on similar landscape positions.
Immokalee soils--have Bh horizons more than 76 centimeters (30 inches) from the surface, are Spodosols, and are on similar landscape positions.
Myakka soils--have Bh horizons less than 76 centimeters (30 inches) from the surface, are Spodosols, and are on similar landscape positions.
Pomello soils-are moderately well to somewhat poorly drained, have spodic horizons, are Spodosols, and are on slightly higher landscape positions.
Pompano soils--lack umbric epipedons, do not have a Bh horizon, and are on similar landscape positions.
Sellers soils have umbric epipedons more than 61 centimeters (24 inches) thick, lack a Bh horizon, and are on similar landscape positions.
St. Lucie soils are excessively drained, lack umbric epipedons, and are on higher landscape positions.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: Very poorly drained.
Saturated hydraulic conductivity (Ksat): Very high to high.
Permeability: Rapid
Surface runoff: Negligible to very low
Ponding frequency and duration: Under natural conditions the soil is covered by water (ponded) - very frequently for very long duration for more than 6 months.
USE AND VEGETATION:
Major Uses: Water quality, forestry, rangeland, and wildlife habitat. Some areas are used for truck crops, citrus, and pasture.
Dominant vegetation: Maidencane, sand cordgrass, pickerelweed, giant cutgrass, waxmyrtle, sedges, and rushes. Scattered cypress, bay, pond pine, blackgum, tupelo, and cabbage palm occur in some areas.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Auburn, Alabama.
DISTRIBUTION AND EXTENT: Southern Florida Flatwoods and South Central Florida Ridge. This soil is of moderate extent
SERIES ESTABLISHED: Lake County, Florida; 1970.
REMARKS: Diagnostic horizons and features in this pedon include:
1. Particle sized control section: 25 to 152 centimeters (10 to 60 inches)
2. Umbric epipedon: 0 to 51 centimeters (0 to 20 inches) (A1 and A2 horizons)
3. Aquic conditions: 0 to 15 centimeters (0 to 6 inches)
ADDITIONAL DATA:
Laboratory data is available on the National Soil Survey website at: http://ncsslabdatamart.sc.egov.usda.gov/querypage.aspx
OSD User Site ID: None
OSD Pedon Site ID: None
National Cooperative Soil Survey
U.S.A.