LOCATION STEADMAN TN+GA
Established Series
NTH, JYM/ Rev. MDJ
02/2018
STEADMAN SERIES
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Fluvaquentic Eutrudepts
TYPICAL PEDON: Steadman silt loam -- in a hay field. Colors are for moist soil.
Ap1--0 to 15 cm (0 to 6 inches); brown (10YR 4/3) silt loam; moderate medium granular structure; very friable; many very fine and fine roots; strongly acid; gradual smooth boundary.
Ap2--15 to 30 cm (6 to 12 inches); brown (10YR 4/3) silt loam; weak fine subangular blocky structure parting to weak medium granular structure; very friable; common very fine and fine roots; few fine tubular pores; neutral; clear smooth boundary. (Combined thickness of the Ap horizons ranges from 7 to 30 cm (3 to 12 inches)).
Bw1--30 to 61 cm (12 to 24 inches); dark yellowish brown (10YR 4/4) silt loam; weak coarse prismatic structure parting to weak fine subangular blocky structure; friable; common very fine and fine roots; many fine and common medium tubular pores; continuous light brownish gray (10YR 6/2) silt coatings on faces of peds and in pores; moderately acid; gradual wavy boundary.
Bw2--61 to 99 cm (24 to 39 inches); dark yellowish brown (10YR 4/6) silt loam; weak medium prismatic structure parting to weak medium subangular blocky structure; friable; few very fine roots; many fine and common medium tubular pores; few fine faint grayish brown (10YR 5/2) redoximorphic depletions; continuous light brownish gray (10YR 6/2) silt coatings on faces of peds and in pores; moderately acid; clear smooth boundary.
Bw3--99 to 132 cm (39 to 52 inches); dark yellowish brown (10YR 4/6) silty clay loam; moderate coarse prismatic structure parting to moderate medium subangular blocky structure; friable; few very fine roots; many fine and common medium tubular pores; common medium faint grayish brown (10YR 5/2) redoximorphic depletions; continuous light brownish gray (10YR 6/2) silt coats on faces of peds and in pores; moderately acid; clear smooth boundary. (Combined thickness of the Bw horizons ranges from 63 to 140 cm (25 to 55 inches)).
C1--132 to 163 cm (52 to 64 inches); mottled, grayish brown (10YR 5/2), brown (10YR 4/3), and yellowish brown (10YR 5/6) silty clay loam; weak coarse prismatic structure parting to weak medium subangular blocky structure; friable; few very fine roots; continuous light brownish gray (10YR 6/2) silt coats on faces of peds and in pores; slightly acid; gradual smooth boundary.
C2--163 to 191 cm (64 to 75 inches); mottled, grayish brown (10YR 5/2), brown (10YR 4/3) and yellowish brown (10YR 5/6) silty clay loam; massive; friable, slightly acid.
TYPE LOCATION:
County: Sullivan
State: Tennessee
USGS Quadrangle: Sullivan Gardens
Latitude (Decimal Degrees, NAD 83): 36.4691658
Longitude (Decimal Degrees, NAD 83): -82.6005554
Directions to the pedon: 152 meters (500 feet) south 60 degrees west from intersection of Highway 93 and Lone Star Road.
RANGE IN CHARACTERISTICS:
Solum Thickness: 76 to more than 152 centimeters (30 to more than 60 inches)
Depth to Bedrock: more than 152 centimeters (60 inches)
Depth Class: very deep
Depth to Seasonal High Water Table: 46 to 91 centimeters (1.5 to 3 feet)
Rock Fragment content: A and Bw horizons: 0 to 5 percent gravel
C horizon: 0 to 35 percent gravel
Soil Reaction: strongly acid to slightly alkaline
Range of Individual Horizons:
Ap or A horizon:
Color -- hue of 7.5YR or 10YR, value of 3 to 5, and chroma of 3 to 6
Texture -- silt loam, silty clay loam, or loam
Bw horizon:
Color - Hue 7.5YR to 2.5Y, value of 4 to 6, and chroma of 3 to 6; some pedons have dominant chroma 2 or less below 100 centimeters (40 inches)
Texture -- silty clay loam or silt loam
Mottles or redoximorphic features -- shades of gray, brown, yellow, or red
C horizon:
Color --Hue 10YR or 2.5Y, value of 4 to 6, and chroma typically 3 to 6; some pedons have gleyed hue or dominant chroma 2 or less below 100 centimeters (40 inches)
Texture (fine-earth fraction) -- silt loam, loam, clay loam, silty clay loam, silty clay, clay, or very fine sandy loam
Mottles or redoximorphic features -- shades of gray, brown, yellow, or red
COMPETING SERIES:
There are no other series in this family.
GEOGRAPHIC SETTING:
MLRA(s) using this series: 128 (Southern Appalachian Ridges and Valleys)
Landscape: river valleys
Landform: flood plain or low stream terrace
Geomorphic Component: tread, riser
Parent Material Origin: alluvium
Parent Material Kind: shale and limestone
Slope: 0 to 3 percent
Elevation: 180 to 690 meters (590 to 2,265 feet)
Frost-free period: 180 to 240 days
Mean Annual Air Temperature: 11.4 to 15.6 degrees C (52 to 60 degrees F).
Mean Annual Precipitation: 1041 to 1714 millimeters (41 to 67 inches)
GEOGRAPHICALLY ASSOCIATED SOILS:
Bays soils -- adjacent uplands; shallow soils formed in shale residuum
Bellamy soils -- adjacent terraces and foot slopes; fine-loamy with Fragic properties in the subsoil
Bloomingdale soils -- adjacent flood plains or depressions; fine textured; poorly drained
Hamblen soils -- adjacent flood plains; fine-loamy particle size class
Pettyjon soils -- adjacent flood plains; fine-loamy particle size class, well drained
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage Class (Agricultural): moderately well drained
Index Surface Runoff: very low
Saturated Hydraulic Conductivity Class: moderately high
Permeability Class (obsolete): moderate
Shrink-Swell Class: low
USE AND VEGETATION:
Major Uses: About 40 percent is cleared, about 40 percent is in woodland, and about 20 percent is in developed areas or other uses
Dominant Vegetation:
Where cultivated -- pasture, hay, small areas of row crops or small grains
Where wooded -- mixture of hardwoods such as oaks, yellow poplar, maple, sycamore, sweetgum, and ash
DISTRIBUTION AND EXTENT:
Distribution: Southern Appalachian Ridges and Valleys in Tennessee and Georgia
Extent: The series is of moderate extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: MORGANTOWN, WEST VIRGINIA
SERIES ESTABLISHED: Sullivan County, Tennessee, 1991
REMARKS:
Diagnostic horizons and soil characteristics recognized in this pedon are:
Ochric epipedon -- the zone from 0 to 30 cm (Ap horizons - 0 to 12 inches)
Cambic horizon -- the zone from 30 to 132 centimeters (Bw horizons - 12 to 52 inches)
Particle size control section -- the zone from 25 to 100 centimeters (10 to 40 inches)
Series control section -- 0 to 200 centimeters (0 to 79 inches)
This edit adopts the semitabular format, updates the ranges in characteristics, geographic setting, and includes minor editorial changes.
ADDITIONAL DATA: Laboratory Data - Characterization of the type location by the National Soil Survey Laboratory. Pedon No. 87P0139
National Cooperative Soil Survey
U.S.A.