LOCATION HAWLEY OKEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, active, thermic Fluventic Haplustepts
TYPICAL PEDON: Hawley fine sandy loam--cultivated. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 9 inches; brown (7.5YR 5/4) fine sandy loam, dark brown (7.5YR 3/4) moist; weak fine granular structure; soft, very friable; moderately acid; clear smooth boundary. (0 to 11 inches thick)
A--9 to 18 inches; brown (7.5YR 4/4) fine sandy loam, dark brown (7.5YR 3/4) moist; weak coarse prismatic structure breaking to weak fine granular; slightly hard, friable; neutral; gradual smooth boundary. (7 to 18 inches thick)
Bw--18 to 34 inches; brown (7.5YR 5/4) fine sandy loam, brown (7.5YR 4/4) moist; weak coarse prismatic structure; soft, very friable; slightly alkaline; gradual smooth boundary. (7 to 40 inches thick)
C1--34 to 50 inches; brown (7.5YR 5/4) fine sandy loam, brown (7.5YR 4/4) moist; massive; soft, very friable; strata 1/4 inch to 4 inches thick of loamy fine sand and very fine sandy loam; moderately alkaline; gradual smooth boundary. (11 to 32 inches thick)
C2--50 to 66 inches; brown (7.5YR 4/4) loam, dark brown (7.5YR 3/2) moist; massive; slightly hard, friable; strata 1/4 inch to 4 inches thick of very fine sandy loam, silt loam, and silty clay loam, few soft powdery masses and threads of calcium carbonate; calcareous; moderately alkaline.
TYPE LOCATION: Grant County, Oklahoma; 6 miles north and 3 miles east of Nash; 1,900 feet west and 140 feet south of the northeast corner of sec. 7, T. 26 N., R. 7 W.
RANGE IN CHARACTERISTICS: Thickness of solum ranges from 20 to 50 inches. Depth to calcium carbonate ranges from 10 to 60 inches. The content of organic matter in the A horizon is less than one percent. Some pedons have buried horizons below a depth of 25 inches.
The Ap horizon has hue of 7.5YR or 10YR, value of 4 to 6, and chroma of 3 or 4. It is loam, fine sandy loam, or loamy fine sand and ranges from moderately acid to slightly alkaline.
The A horizon has hue of 7.5YR or 10YR, value of 3 to 5, and chroma of 3 or 4. It is fine sandy loam or loam and ranges from slightly acid to slightly alkaline.
The Bw horizon has hue of 5YR, or 7.5YR, value of 4 to 6, and chroma of 3 to 6. It is fine sandy loam or loam and ranges from slightly acid to moderately alkaline. This horizon is calcareous in some pedons.
The C horizon has hue of 5YR or 7.5YR, value of 4 to 7, and chroma of 3 to 6. It is fine sandy loam, loam, or in some pedons below a depth of 36 inches, it is loamy fine sand with thin strata of silt loam, silty clay loam, sandy clay loam, loamy very fine sand, or fine sand. Reaction ranges from neutral to moderately alkaline.
Some pedons have a buried A horizon below a depth of 25 inches. This horizon has hue of 7.5YR or 10YR, dry value of 3 to 5, and chroma of 2 to 4. Other pedons have horizons with contrasting texture below a depth of 36 inches.
COMPETING SERIES: These are the Guadalupe series of the same family and the Dalupe, Pocasset, and Weswood series of similar families. Dalupe soils have mesic temperatures. Guadalupe soils are dryer for longer periods of time. Pocasset soils have a mollic epipedon. Weswood soils have a fine silty particle-size control section.
GEOGRAPHIC SETTING: Hawley soils are on nearly level to very gently sloping alluvial high flood plains. Slopes are 0 to 3 percent. These soils typically formed in material weathered from loamy alluvium but in some areas, these soils formed partly in a sandy eolian mantle. Mean annual temperature is 58 to 63 degrees F; mean annual precipitation is 30 to 40 inches; Thornthwaite annual P-E indices are 44 to 64. Frost Free Days are 190 to 230; Elevation ranges from 750 to 1300 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the similar Pocasset series and Canadian, Crisfield, Dale, Gaddy, Lela, McLain, Miller, Port, Reinach, and Yahola series. Canadian, Crisfield, Dale, Lela, McLain, and Reinach soils are on flood plains at similar elevations. Canadian, Crisfield, Dale, Lela, McLain, Miller, Port, and Reinach soils have a mollic epipedon. Gaddy, Miller, Pocasset, Port, and Yahola soils are on flood plains at lower elevations. Gaddy and Yahola soils do not have a cambic horizon and are calcareous within a depth of 10 inches from the surface. In addition, Gaddy soils have a sandy control section.
DRAINAGE AND PERMEABILITY: Well drained; runoff is negligible on 0 to 1 percent slopes and low on 1 to 3 percent slopes; moderate permeability. This soil is subject to rare flooding April through November.
USE AND VEGETATION: Most areas are cropped to wheat, other small grains, grain sorghums and alfalfa. Native vegetation consists of tall and mid grass prairie with minor amounts of American elm, willow, pecan, bur oak, eastern cottonwood, and green ash trees.
DISTRIBUTION AND EXTENT: Central Rolling Red Prairies (MLRA 80A) of north central Oklahoma. The series is not extensive.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Grant County, Oklahoma; 1983.
REMARKS: This series was formerly a part of the Canadian series.