LOCATION ALRED MOEstablished Series
TAXONOMIC CLASS: Loamy-skeletal over clayey, siliceous, semiactive, mesic Typic Paleudalfs
TYPICAL PEDON: Alred extremely cobbly loam - on a west facing, convex 26 percent slope in a fescue pasture at an elevation of 1,030 feet. (Colors are for moist soil unless otherwise stated.)
A--0 to 4 inches; very dark grayish brown (10YR 3/2) extremely cobbly loam, grayish brown (10YR 5/2) dry; weak fine granular structure; very friable; many very fine, common fine and few medium roots; many very fine irregular pores; 40 percent chert gravel and 30 percent chert cobbles; slightly acid (pH 6.4); abrupt smooth boundary. (3 to 7 inches thick)
Bt1--4 to 9 inches; yellowish brown (10YR 5/4) and brown (10YR 4/3) extremely gravelly silt loam; moderate fine subangular blocky structure; very friable; many very fine, common fine and few medium roots; common very fine tubular pores; few distinct clay films on faces of peds; 60 percent chert gravel and 10 percent chert cobbles; slightly acid (pH 6.2); clear smooth boundary.
Bt2--9 to 17 inches; dark yellowish brown (10YR 4/4) and brown (10YR 4/3) extremely gravelly silt loam; moderate medium subangular blocky structure; friable; many very fine and common medium roots; common very fine tubular pores; few distinct clay films on faces of peds; 65 percent chert gravel; neutral (pH 6.6); clear smooth boundary.
Bt3--17 to 27 inches; strong brown (7.5YR 5/6) extremely cobbly silty clay loam; weak fine subangular blocky structure; friable; few fine and medium roots; common very fine tubular pores; common distinct clay films on faces of peds; 40 percent chert gravel and 40 percent chert cobbles; neutral (pH 6.8); abrupt wavy boundary. (combined thickness of the Bt horizon is 6 to 35 inches)
2Bt4--27 to 44 inches; dark red (2.5YR 3/6) and yellowish red (5YR 4/6) clay; strong very fine angular blocky structure; firm; few medium roots; many very fine tubular pores; many prominent clay films on faces of peds; 10 percent chert gravel; neutral (pH 6.8); clear wavy boundary.
2Bt5--44 to 53 inches; dark red (2.5YR 3/6), yellowish red (5YR 4/6) and brown (7.5YR 5/2) gravelly clay; weak medium subangular blocky structure parting to moderate very fine angular blocky; firm; common very fine tubular pores; many prominent clay films of faces of peds; 20 percent chert gravel; neutral (pH 6.8); gradual smooth boundary.
2Bt6--53 to 60 inches; dark red (2.5YR 3/6), red (2.5YR 4/6) and brown (7.5YR 4/4) cobbly clay; moderate fine angular blocky structure; firm; common very fine tubular pores; many prominent clay films of faces of peds and in pores; 20 percent chert cobbles; slightly acid (pH 6.4). (combined thickness of the 2Bt horizon is 20 to 45 inches or more)
TYPE LOCATION: Texas County, Missouri; located about 9 miles southeast of Licking; 500 feet south and 50 feet west of the NE corner of section 4, T. 31 N., R. 7 W.; Montauk USGS quadrangle; latitude 37 degrees 25 minutes 19 seconds N. and longitude 91 degrees 42 minutes 04 seconds W.
RANGE IN CHARACTERISTICS:
Depth to Bedrock: More than 60 inches
Depth to 2Bt: 14 to 40 inches
Surface Cover: 0 to 0.1 percent stones
A or Ap horizon
Hue: 10YR
Value: 3 to 5
Chroma: 2 to 4
Fine-earth: silt loam or loam
Total Rock fragments: 15 to 80 percent;
15 to 80 percent gravel;
0 to 50 percent cobbles
Reaction: neutral to extremely acid
E or BE horizons (Where present)
Hue: 7.5YR and 10YR
Value: 4 to 6
Chroma: 3 to 6
Fine-earth: silt loam or loam
Total Rock fragments: 10 to 80 percent;
10 to 80 percent gravel;
0 to 50 percent cobbles
Reaction: neutral to very strongly acid
Bt horizon
Hue: 2.5YR to 10YR
Value: 4 to 6
Chroma: 3 to 8
Fine-earth: silt loam, silty clay loam, loam, sandy clay loam, or clay
Total Rock fragments: 35 to 80 percent; 35 to 80 percent gravel and 0 to 50 percent cobbles (individual subhorizons may contain less)
Reaction: neutral to very strongly acid
2Bt horizon
Hue: 10R to 10YR
Value: 3 to 6
Chroma: 1 to 8
Fine-earth: silty clay or clay
Total Rock fragments: 0 to 35 percent; 0 to 30 percent gravel and 0 to 20 percent cobbles
Note: In some pedons the lower part of the 2Bt below the particle size control section ranges up to 60 percent rock fragments.
Reaction: slightly alkaline to very strongly acid
COMPETING SERIES: There are no other series in this family.
GEOGRAPHIC SETTING: Alred soils are on moderately sloping to strongly sloping narrow ridgetops and moderately steep to very steep sideslopes of hills. They formed in cherty hillslope sediments and the underlying clayey residuum. Slopes range from 1 to 60 percent. Elevations are commonly 600 to 1,050 feet. Mean annual temperature ranges from 54 to 58 degrees F., and the mean annual precipitation ranges from 40 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bardley, Bendavis, Gasconade, Goss, Lecoma, Mano, and Ocie soils. Bardley soils are moderately deep to dolomite, have a very fine particle size control section and on are similar positions. Bendavis soils are moderately deep to chert bedrock, have a loamy-skeletal particle size control section and are on lower side slopes. Gasconade soils are very shallow and shallow to dolomite and are on similar positions. Goss soils have a clayey-skeletal and are on similar landscape positions. Lecoma soils have a fine-loamy particle size control section and are on high stream terraces below the Alred soils. Mano soils are moderately well drained and are on similar positions. Ocie soils are moderately well drained, have bedrock from 40 to 60 inches in depth and are on similar landscape positions.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is high to very high. Permeability is moderate in the upper part of the profile and slow in the lower part. The saturated hydraulic conducivity is moderately high over moderately low.
USE AND VEGETATION: This soil is used mainly for timber production. Native vegetation is mixed hardwoods. A few areas have been cleared and are used for hay and pasture.
DISTRIBUTION AND EXTENT: The Ozark Highlands area of southern Missouri and northern Arkansas (MLRA 116A). The series is of large extent, almost a half a million acres have been mapped to date.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Osage County, Missouri soil survey; 1996.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon--the zone from the surface to a depth of 4 inches. (Ap horizon).
Argillic horizon--the zone from 4 to 60 inches (Bt and 2Bt horizons).
ADDITIONAL DATA: NSSL Data Number-- S92MO-215-001