LOCATION AVILLA AR
Established Series
JV-RV/Rev. MDJ
09/2014
AVILLA SERIES
TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, thermic Typic Paleudults
TYPICAL PEDON: Avilla silt loam on a smooth 4 percent slope, in pasture. (Colors are for moist soil unless otherwise stated)
Ap1--0 to 8 cm (0 to 3 in); brown (10YR 4/3) silt loam; weak fine and medium granular structure; friable; many fine roots; about 1 percent by volume rounded sandstone gravel less than 8 cm (3 in) in diameter; slightly acid; clear smooth boundary. (5 to 18 cm (2 to 7 in thick))
Ap2--8 to 23 cm (3 to 9 in); dark yellowish brown (10YR 4/4) silt loam; moderate fine and medium granular structure; friable; common fine roots; about 1 percent by volume rounded sandstone gravel less than 3 inches in diameter; moderately acid; clear smooth boundary. (0 to 18 cm (0 to 7 inches thick))
Bt1--23 to 28 cm (9 to 19 in); yellowish red (5YR 5/8) clay loam; weak medium subangular blocky structure; friable; few fine roots; common fine pores; about 5 percent by volume rounded sandstone gravel less than 75 mm (3 in) in diameter; thin faint (patchy) clay films on faces of some peds; strongly acid; clear wavy boundary.
Bt2--28 to 79 cm (19 to 31 in); red (2.5YR 5/8) clay loam; moderate medium subangular blocky structure; firm; many fine pores; few fine roots; about 7 percent by volume rounded sandstone gravel less than 75 mm (3 in) in diameter; thin faint (patchy) clay films on faces of most peds; very strongly acid; clear wavy boundary.
Bt3--79 to 142 cm (31 to 56 in); mottled, red (2.5YR 4/8), strong brown (7.5YR 5/8), and brownish yellow (10YR 6/6) clay loam; moderate medium subangular blocky structure; friable; few fine pores; about 12 percent by volume rounded sandstone gravel less than 75 mm (3 in) in diameter; thin faint (patchy) clay films on faces of most peds; very strongly acid; gradual wavy boundary.
Bt4--142 to 183 cm (56 to 72 in); mottled, red (2.5YR 4/8), yellowish red (5YR 5/8), strong brown (7.5YR 5/8), and light gray (10YR 7/2), very gravelly clay loam; moderate medium and coarse subangular blocky structure; friable; few fine pores; about 60 percent by volume rounded sandstone gravel less than 75 mm (3 in) in diameter; thin faint (patchy) clay films on faces of most peds and on gravel; very strongly acid.
TYPE LOCATION:
County: Saline County
State: Arkansas
USGS Quadrangle: Paron
Latitude (Decimal Degrees, NAD 83): 34.784272
Longitude (Decimal Degrees, NAD 83): 92.761737
RANGE IN CHARACTERISTICS:
Depth to the top of the Argillic: 8 to 38 cm (3 to 15 inches)
Depth to the base of the Argillic: 125 to 250 cm (50 to 98 Inches)
Solum Thickness: 152 to 2l6 cm (60 to 85 inches)
Depth to Bedrock: > 152 cm (> 60 inches)
Depth Class: Very deep
Depth to Seasonal High Water Table: > 150
Combined thickness of the Bt horizons: ranges from 117 to more than 211 cm (46 to more than 83 in)
Rock Fragment content: Sandstone and shale fragments less than 75 mm (3 inches) in diameter range from 0 to 25 percent by volume in the A horizon; 0 to 15 percent by volume in the E, BE and BA horizons, where present; 0 to 15 percent by volume in the Bt1 and Bt2 horizons; 0 to 35 percent by volume in the Bt3 horizon and 15 to 60 percent by volume in the Bt4 and BC horizons
Soil Reaction: strongly acid or very strongly acid throughout except for surface layers that have been limed.
Range of Individual Horizons:
A or Ap horizon:
Color: hue of 10 YR, values of 4 or 5 and chroma of 2, 3, or 4; or hue of 7.5 YR, values of 4 and chroma of 4; Some pedons have an A horizon 5 to 10 cm thick (2 - 4 inches), that has hue of 10 YR, values of 3 and chroma of 1, 2, or 3
Texture (fine-earth fraction): silt loam, loam, fine sandy loam, gravelly fine sandy loam, gravelly loam or gravelly silt loam
Rock Fragments: 0 to 25 percent sandstone, less than 75 mm (3 inches) in diameter
Reaction: moderately acid or strongly acid, except where amendments have been applied.
E horizon (where present):
Color: hue of 10 YR, values of 5 or 6 and chroma of 3 or 4
Texture (fine-earth fraction): Fine sandy loam, very fine sandy loam, loam or silt loam
Rock fragments: 0 to 15 percent sandstone, less than 75 mm (3 inches) in diameter
Reaction: strongly acid or very strongly acid, except where amendments have been applied
BA or BE horizon:
Color: hue of 5 YR, value of 4 or 5, and chroma of 4, 6 or 8; or hue of 7.5 YR, value of 4, and chroma of 4, or value of 5 and chroma of 4, 6 or 8
Texture (fine-earth fraction): fine sandy loam, clay loam, loam, sandy clay loam or silt loam or very fine sandy loam
Rock fragments: 0 to 15 percent sandstone, less than 75 mm (3 inches) in diameter
Recation: strongly acid or very strongly acid
Bt1 horizon:
Color: hue of 7.5 YR or 5YR, values of 4 or 5 and chroma of 4, 6 or 8
Texture (fine-earth fraction): Clay loam, loam, sandy clay loam or silty clay loam
Rock fragments: 0 to 15 percent sandstone, less than 75 mm (3 inches) in diameter
Reaction: strongly acid or very strongly acid
Bt2 horizon:
Color: hue of 2.5YR or 5YR, values of 4 or 5 and chroma of 4, 6 or 8 or hue of 7.5 YR, values of 5 and chroma of 6 or 8
Texture (fine-earth fraction): Clay loam, sandy clay loam, silty clay loam or their gravelly analogs
Rock fragments: 0 to 35 percent sandstone, less than 75 mm (3 inches) in diameter
Reaction: strongly acid or very strongly acid
Bt3 horizon:
Color: hue of 2.5YR or 5YR, values of 4 or 5 and chroma of 4, 6 or 8. Many pedons lack a dominant matrix color and are variegated in shades of yellow, red, brown and gray.
Texture (fine-earth fraction): Clay loam, sandy clay loam, loam or silty clay loam or their gravelly analogs.
Redoximorphic features (if they occur): Iron depletions and concentrations are none to common in shades of brown, yellow, red and gray. Gray iron depletions occur below 76 cm (30 in) from the surface.
Rock fragments: 0 to 35 percent sandstone, less than 75 mm (3 inches) in diameter
Reaction: strongly acid or very strongly acid
Bt4 horizon (where present):
Color: hue of 5YR or 2.5YR values of 4 or 5 and chroma of 4, 6 or 8. Many pedons lack a dominant matrix color and are variegated in shades of yellow, red, brown and gray.
Texture (fine-earth fraction): gravelly loam, gravelly clay loam, gravelly sandy clay loam, very gravelly clay loam, very gravelly sandy clay loam, or very gravelly loam
Redoximorphic features (if they occur): Iron depletions and concentrations are few to many in shades of red, brown, yellow and gray
Rock fragments: 15 to 60 percent sandstone, less than 75 mm (3 inches) in diameter
Reaction: strongly acid or very strongly acid
BC horizon:
Color: hue of 2.5YR or 5 YR values of 4, or 5 and chroma of 4, 6 or 8. Many pedons lack a dominant matrix color and are variegated in shades of yellow, red, brown and gray
Texture (fine-earth fraction): gravelly clay loam, gravelly sandy clay loam, gravelly loam, very gravelly clay loam, very gravelly sandy clay loam or very gravelly loam
Redoximorphic features (if they occur): iron concentrations and depletions are few to many in shades of red, brown, yellow or gray
Rock fragments: 15 to 60 percent sandstone, less than 75 mm (3 inches) in diameter
Reaction: strongly acid or very strongly acid
COMPETING SERIES:
Allen soils contain less than 15 percent coarse fragments in the lower Bt horizons.
Etowah soils contain less than 15 percent coarse fragments in the lower Bt horizons.
Nella soils have base saturations of less than 20 percent.
Octavia soils contain a lithologic discontinuity and a perched water table at 3.5 to 5 feet.
Ruston soils are bisequal and are mapped on the Western Creataceous Coastal Plain.
Warnock soils have Bt horizons dominated by hues of 7.5YR or 10YR, exhibit some brittleness, and contain plinthite.
GEOGRAPHIC SETTING:
MLRA(s) using this series: 118A and 119
Landscape: Valley
Landform: stream terrace
Geomorphic Component: Tread
Parent Material Origin: Sandstone and Shale
Parent Material Kind: loamy alluvium
Slope: 1 to 12 percent
Elevation: 82 to 406 meters
Frost-free period: 200 to 260 days
Mean Annual Air Temperature: 14 to 17 degrees C
Mean Annual Precipitation: 1090 to 1770 millimeters
GEOGRAPHICALLY ASSOCIATED SOILS:
Carnasaw soils are located on adjacent uplands, have clayey control sections, and 40 to 60 inches sola over soft bedrock
Ceda soils are on floodplains, have loamy-skeletal control sections and no argillic horizon
Kenn soils are on floodplains and low terraces, have 40 to 60 inch sola and higher base saturation
Leadvale soils are in adjacent valleys, have fine-silty control sections and fragipans
Sherless soils are on adjacent uplands, and have 20 to 40 inch sola over soft bedrock
Speer soils are on adjacent floodplains and low terraces, have 40 to 60 inch sola and higher base saturation
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage Class (Agricultural): well
Index Surface Runoff: slow to rapid
Saturated Hydraulic Conductivity Class: moderately high to high
Permeability Class (obsolete): moderate
Flooding Frequency and Duration: none
Ponding Frequency and Duration: none
USE AND VEGETATION:
Major Uses: Pasture and hay crops
Dominant Vegetation: Bermuda grass, Bahaiagrass, tall fescue; where wooded: Red Oak, Post Oak, Blackjack Oak, Sweetgum, Walnuts and Shortleaf Pine
DISTRIBUTION AND EXTENT:
Distribution: Arkansas Valley and Ridges, Eastern Part and Ouachita Maintains
Extent: Large extent, about 533,360 acres in size
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: MORGANTOWN, WEST VIRGINIA
SERIES ESTABLISHED: Saline County, Arkansas; 1976
REMARKS:
Diagnostic horizons and soil characteristics recognized in this pedon are:
Ochric epipedon: the zone from 0 to 23 cm (Ap horizon)
Argillic horizon: the zone from 23 to 183 inches (Bt horizons)
Series control section: the zone from 23 to 73 inches (9 to 29 inches)
ADDITIONAL DATA:
There is not lab data on file for this series.
National Cooperative Soil Survey
U.S.A.