LOCATION MOUNTAINBURG AR+AL GA
JV-RV /Rev. MDJ
TAXONOMIC CLASS: Loamy-skeletal, siliceous, subactive, thermic Lithic Hapludults
TYPICAL PEDON: Mountainburg cobbly fine sandy loam, 20 percent slopes, forested.
(Colors are for moist soil unless otherwise stated).
A--0 to 3 cm (0 to 1 inches); very dark grayish brown (10YR 3/2), cobbly fine sandy loam; moderate medium granular structure; very friable; many fine and medium roots; about 30 percent by volume sandstone fragments 6 to 305 mm or more in diameter; moderately acid; clear smooth boundary. (3 to 15 cm (1 to 6 inches) thick)
E--3 to 15 cm (1 to 6 inches); brown (10YR 5/3) cobbly fine sandy loam; weak medium subangular blocky structure; very friable; many fine and medium roots; about 30 percent by volume sandstone fragments 6 to 305 mm or more in diameter; strongly acid; clear smooth boundary. (0 to 20 cm (0 to 8 inches) thick)
Bt--15 to 46 cm (6 to 18 inches); strong brown (7.5YR 5/6) very cobbly sandy clay loam, weak medium subangular blocky structure; friable; many fine and medium roots; about 40 percent by volume sandstone fragments 6 to 305 mm or more in diameter; strongly acid; clear smooth boundary. (15 to 36 cm (6 to 14 inches) thick)
R--46 to 51 cm (18 to 20 inches); slightly weathered, horizontally bedded, acid sandstone.
USGS Quadrangle: Rhea
Latitude: (Decimal Degrees, NAD 83): 36.0105
Longitude: (Decimal Degrees, NAD 83): 94.4288
Directions to the pedon: 4.8 Miles north of Lincoln, AR on Weddington Mountain, 581 feet southwest of the intersection of Gem Road and N Jackson Hwy, on ridgetop.
RANGE IN CHARACTERISTICS:
Depth to the top of the Argillic: 10 to 33 cm (4 to 13 inches)
Depth to the base of the Argillic: 25 to 48 cm (10 to 19 inches)
Solum Thickness: 30 to 51 cm (12 to 20 inches)
Depth to Bedrock: 30 to 51 cm (12 to 20 inches)
Depth Class: Shallow
Depth to Seasonal High Water Table: None
Depth to Lithologic Discontinuity: None
Rock Fragment content: 5 to 60 percent, by volume, in the A, E and BA horizons; > 35 to 60 percent, by volume, in the Bt horizon.
Soil Reaction: very strongly acid to slightly acid.
Range of Individual Horizons:
A or Ap horizon:
Color-- hue 10 YR or 7.5 YR, values of 3, 4 or 5, and chroma of 2, 3, or 4.
Texture (fine-earth fraction)--Fine sandy loam, sandy loam, silty loam or loam.
Other features: 5 to 60 percent fragments; gravelly, very gravelly, cobbly, stony, very stony and bouldery modifiers are recognized.
E horizon (if it occurs):
Color-- hue10 YR or 7.5 YR, value of 4 or 5 and chroma of 3, 4 or 6.
Texture (fine-earth fraction) -- fine sandy loam, sandy loam or loam.
Other features-- 5 to 60 percent fragments; gravelly, very gravelly, stony and very stony modifiers are recognized.
BA horizon (if it occurs):
Color-- hue 10YR, 7.5 YR or 5YR, value of 4 or 5 and chroma of 4 or 6.
Texture (fine-earth fraction) -- fine sandy loam or loam.
Other features--5 to 60 percent fragments; gravelly, very gravelly, cobbly very cobbly, stony or very stony modifiers are recognized.
Bt horizon :
Color-- hue 10YR, 7.5 YR or 5YR, value of 4 or 5 and chroma of 4, 6 or 8.
Texture (fine-earth fraction) -- fine sandy loam, sandy clay loam, sandy loam, or loam.
Other features-- Greater than 35 percent fragments; very gravelly, extremely gravelly, very cobbly, very stony or extremely stony modifiers are recognized.
There are no other soils in this classification.
MLRA(s) using this series: 116A, 117, 118A, 119, 128, 136.
Landscape: Hills and Mountains
Landform: Hills and Mountains
Geomorphic Component: Hill- Interfluve, Mountain- mountaintop
Hillslope Profile Position: backslope
Parent Material Origin: sandstone
Parent Material Kind: loamy residuum
Slope: 1 to 65 percent
Elevation: 60 to 780 meters
Frost-free period: 140 to 370 days
Mean Annual Air Temperature: 12 to 17 degrees C.
Mean Annual Precipitation: 1100 to 1540 centimeters
GEOGRAPHICALLY ASSOCIATED SOILS:
Enders soils are deeper to bedrock and have a fine particle-size class.
Hector soils have 10 to 20 inch sola and have a loamy particle-size class.
Linker soils have a fine-loamy particle-size class.
Nella soils have sola greater than 60 inches thick and are in a fine-loamy particle-size class.
Steprock soils have 20 to 40 inch sola and are in a loamy-skeletal particle-size class.
DRAINAGE AND PERMEABILITY:
Drainage Class (Agricultural): Well Drained
Internal Free Water Occurrence: None
Index Surface Runoff: Slow to Rapid
Saturated Hydraulic Conductivity Class: High
Permeability Class (obsolete): Moderate rapidly
Shrink-swell Class: Low
Flooding Frequency and Duration: None
Ponding Frequency and Duration: None
USE AND VEGETATION:
Major Uses: Woodland and pasture.
Dominant Vegetation: Where wooded-- Blackjack Oak, Cedar, Hickory, Red Oak, Sweetgum. Pastureland -- Bermuda grass, Bahaiagrass.
DISTRIBUTION AND EXTENT:
Distribution: Ozark Highland, Boston Mountains, Arkansas Valley and Ridge Eastern part, Ouachita Mountains, of Arkansas, and Alabama; Southern Appalachian Ridges, and Georgia: Southern Piedmont.
Extent: Large extent, about 1,112,000 acres in size
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia.
SERIES ESTABLISHED: Washington County, Arkansas, 1970.
Diagnostic horizons and soil characteristics recognized in this pedon are:
Ochric epipedon--the zone from 0 to 15 cm (0 to 6 inches) (A and E horizon)
Argillic horizon--the zone from 15 to 46 cm (6 to 18 inches)
Other soil features identified with this pedon:
Lithic contact-- 46 cm (18 inches)
Series control section--the zone from 15 to 46 cm (6 to 18 inches)
Lab data is available from the University of Arkansas fort the following pedons :
S69AR009-02 , S69AR067-01, S69AR131-09, S70AR071-05, S77AR143-05.
National Cooperative Soil Survey