LOCATION MADGE OKEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Typic Argiustolls
TYPICAL PEDON: Madge loam, on a 1 percent slope in a cultivated wheat field. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 9 inches; reddish brown (5YR 4/3) loam, dark reddish brown (5YR 3/3) moist; moderate fine granular structure; slightly hard, friable; few fine roots; slightly acid; abrupt smooth boundary. (5 to 12 inches thick)
A--9 to 13 inches; dark reddish gray (5YR 4/2) loam, dark reddish brown (5YR 3/2) moist; moderate fine subangular blocky structure parting to moderate fine granular; slightly hard, friable; few fine roots; common fine pores; few wormcasts; slightly alkaline; gradual smooth boundary. (0 to 10 inches thick)
BA--13 to 18 inches; reddish brown (5YR 4/3) clay loam, dark reddish brown (5YR 3/3) moist; moderate medium subangular blocky structure parting to moderate medium granular; slightly hard, friable; few fine roots; common fine pores; few wormcasts; neutral; gradual smooth boundary. (0 to 6 inches thick)
Bt1--18 to 25 inches; reddish brown (5YR 4/4) clay loam, dark reddish brown (5YR 3/4) moist; moderate fine and medium prismatic structure parting to moderate medium subangular blocky; hard, firm; few fine roots; common fine pores; common wormcasts; thin continuous clay films on faces of peds; neutral; gradual smooth boundary. (6 to 17 inches thick)
Bt2--25 to 41 inches; reddish brown (5YR 5/4) sandy clay loam, reddish brown (5YR 4/4) moist; moderate medium prismatic structure parting to weak medium subangular blocky; hard, firm; few fine roots; common fine pores; common wormcasts; thin continuous clay films on faces of peds; neutral; gradual smooth boundary. (9 to 24 inches thick)
BC--41 to 57 inches; red (2.5YR 5/6) loam, red (2.5YR 4/6) moist; moderate coarse prismatic structure; hard, friable; few fine roots; patchy clay films on vertical faces of prisms; few pockets of clean sand grains; neutral; gradual smooth boundary. (8 to 20 inches thick)
C--57 to 80 inches; red (2.5YR 5/8) fine sandy loam, red (2.5YR 4/8) moist; massive; slightly hard, friable; moderately alkaline.
TYPE LOCATION: Harmon County, Oklahoma; about 1 mile west and 1 mile south of Vinson; 200 feet north and 2,400 feet east of the southwest corner of sec. 19, T. 5 N., R. 25 W.; Latitude: 34 degrees, 53 minutes, 11.5 seconds N; Longitude: 99 degrees, 52 minutes, 47.5 seconds W. Madge, Okla topographic quadrangle; NAD 1927.
RANGE IN CHARACTERISTICS:
Particle-size control section (weighted average)
Clay content: 18 to 35 percent
Coarse Fragments: 0 to 3 percent, by volume
CEC/clay ratio: more than 0.6
Thickness of the solum, 50 to more than 80 inches
Thickness of the mollic epipedon, 10 to 20 inches
Depth to secondary calcium carbonate: more than 36 inches
A Horizon
Hue: 5YR or 7.5YR
Value: 3 or 4 (2 or 3 moist)
Chroma: 2 or 3
Texture: loam or fine sandy loam
Clay content: 8 to 25 percent
Effervescence: Noneffervescent
Reaction: Slightly acid to slightly alkaline (pH 6.1 - 7.8)
BA or AB Horizon
Hue: 5YR
Value: 4 or 5 (3 or 4 moist)
Chroma: 3
Texture: loam, clay loam, or sandy clay loam
Coarse fragments: 0 to 3 percent rounded gravel, by volume
Effervescence: Noneffervescent
Reaction: Neutral to moderately alkaline (pH 6.6 - 8.4)
Upper Bt Horizon
Hue: 5YR
Value: 4 or 5 (3 or 4 moist)
Chroma: 3 to 6
Texture: clay loam, sandy clay loam, or loam
Coarse fragments: 0 to 3 percent rounded gravel, by volume
Effervescence: Noneffervescent
Reaction: Neutral to moderately alkaline (pH 6.6 - 8.4)
Lower Bt Horizon
Hue: 2.5YR or 5YR
Value: 4 or 5 (3 or 4 moist)
Chroma: 4 to 6
Texture: clay loam, sandy clay loam, loam, or fine sandy loam
Coarse fragments: 0 to 3 percent rounded gravel, by volume
Calcium carbonate equivalent: 0 to 10 percent
Effervescence: Noneffervescent to strongly effervescent
Reaction: Neutral to moderately alkaline (pH 6.6 - 8.4)
BC Horizon
Hue: 2.5YR or 5YR
Value: 4 to 6 (3 to 5 moist)
Chroma: 4 to 8
Texture: loam, very fine sandy loam, fine sandy loam, or loamy sand
Coarse fragments: 0 to 3 percent rounded gravel, by volume
Calcium carbonate equivalent: 0 to 10 percent
Identifiable secondary carbonate: fine and medium, concretions, masses, and threads range from 0 to 5 percent, by volume
Effervescence: Noneffervescent to strongly effervescent
Reaction: Neutral to moderately alkaline (pH 6.6 - 8.4)
C Horizon
Hue: 2.5YR or 5YR
Value: 4 to 6 (3 to 5 moist)
Chroma: 6 to 8
Texture: loam, very fine sandy loam, fine sandy loam, loamy sand, or sand
Coarse fragments: 0 to 5 percent rounded gravel, by volume; fragments of soft sandstone or shale, less than 3 inches in diameter, occurs in some pedons below depths of 72 inches.
Calcium carbonate equivalent: 0 to 10 percent
Identifiable secondary carbonate: fine and medium, concretions, masses, and threads range from 0 to 5 percent, by volume
Effervescence: Noneffervescent to strongly effervescent
Reaction: Slightly alkaline or moderately alkaline (pH 7.4 - 8.4)
COMPETING SERIES: This is the
Farry series in the same family. Similar soils are the
Altus,
Bukreek,
Ozark, and
Tipton series.
Farry soils: These soils contain 3 percent or more rounded gravel in the particle-size control section.
Altus and Tipton soils These soils have a mollic epipedon more than 20 inches thick.
Bukreek soils: These soils have a calcic horizon.
Ozark soils: These soils have a discontinuity and a perched water table.
GEOGRAPHIC SETTING:
Parent material: loamy alluvium of Pleistocene age
Landform: Treads of stream terraces on allurvial plains
Slope: 0 to 3 percent
Mean annual air temperature range: 57 to 64 degrees F.
Mean annual precipitation range: 20 to 28 inches
Frost-free period: 180 to 230 days
Elevation: 1000 to 2000 feet
Thornthwaite annual P-E indices: 32 to 44
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Abilene,
Shrewder,
St. Paul, and
Woodward series.
Abilene soils: These soils have a fine particle-size control section and occur on similar areas.
Shrewder soils: These soils have a coarse-loamy particle-size control section, have a cambic horizon, and usually occur on side slopes or convex areas.
St. Paul soils: These soils have a fine-silty particle-size control section, have mollic surfaces more than 20 inches thick and occur on broad upland plains.
Woodward soils: These soils have an ochric epipedon, are less than 40 inches deep over sandstone and occur on higher landscapes.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderate. Runoff is low on 0 to 1 percent slopes and medium on 1 to 3 percent slopes.
USE AND VEGETATION: Soils are mainly cultivated. Cotton, wheat, alfalfa, and grain sorghum are the principal crops. Native vegetation consists of mid and tall grasses.
DISTRIBUTION AND EXTENT: Western Oklahoma and possibly north Texas; LRR H; Central Rolling Red Plains (MLRA-78C); Moderate extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Harmon County, Oklahoma; 1982
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 18 to 38 inches. (Bt1 and Bt2 horizons)
Mollic epipedon: 0 to 18 inches. (A and BA horizons)
Argillic horizon: 18 to 41 inches. (Bt horizons)
Additional Comments: These soils were formerly included in the Carey, Lawton, or St. Paul series in some older published soil surveys.
The assignment of the cation-exchange activity class is supported by laboratory data number S97ok-057-001 and S97ok-057-003 from Harmon county, OK.
Range Site: Loamy Prairie (078CY056OK)
Soil Interpretation Record Number: OK0272
Taxonomic version: Keys to Soil Taxonomy, Eighth Edition, 1998
ADDITIONAL DATA:
National Soil Survey Lab - S97ok-057-002
Oklahoma State University - Lab sample 80-OK-29-1-(1-7).