LOCATION KINGFISHER OK+KSEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Udic Argiustolls
TYPICAL PEDON: Kingfisher silt loam--cultivated. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 14 inches; reddish brown (5YR 4/3) silt loam, dark reddish brown (5YR 3/3) moist; moderate medium granular structure; slightly hard, friable; many fine roots; upper 6 inches mixed by cultivation; many fine pores; slightly acid; gradual smooth boundary. (8 to 16 inches thick)
BA--14 to 21 inches; reddish brown (5YR 4/4) silty clay loam, dark reddish brown (5YR 3/4) moist; moderate coarse granular structure; hard, friable; many fine roots; neutral; gradual smooth boundary. (3 to 10 inches thick)
Bt1--21 to 32 inches; reddish brown (5YR 4/4) silty clay loam, dark reddish brown (5YR 3/4) moist; moderate medium subangular blocky structure; hard, firm; common fine roots throughout peds; distinct continuous clay films on faces of peds; slightly alkaline; gradual smooth boundary. (6 to 16 inches thick)
Bt2--32 to 38 inches; reddish brown (2.5YR 4/4) silty clay loam, dark reddish brown (2.5YR 3/4) moist; moderate medium subangular blocky structure; hard, firm; few fine pores; few fine roots; distinct continuous clay films on faces of peds; moderately alkaline; gradual boundary. (2 to 10 inches thick)
Cr--38 to 46 inches; red (2.5YR 5/8) weathered silty shale red beds, red (2.5YR 4/8) moist; moderately alkaline; weakly effervescent.
TYPE LOCATION: Kingfisher County, Oklahoma; about 1 mile west and 5 miles south of Kingfisher; 1,800 feet west and 50 feet south of the northeast corner of sec. 16, T. 15 N., R. 7 W.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 20 to 40 inches.
The Ap horizon has hue of 5YR to 10YR, value of 4 or 5, and chroma of 2 or 3. It is silt loam or loam and ranges from slightly acid through slightly alkaline.
The BA horizon has hue of 2.5YR to 7.5YR, value of 4 or 5, and chroma of 2 to 4. It is silt loam, silty clay loam, or clay loam and ranges from slightly acid through slightly alkaline.
The Bt horizons have hue of 2.5YR or 5YR, value of 4 or 5, and chroma of 3 to 6. The Bt1 horizon is silty clay loam or clay loam with clay content ranging from 27 to 35 percent. The Bt2 horizon has similar texture except that silty clay is allowed and clay content ranges from 27 to 42 percent. The Bt horizons range from slightly acid through moderately alkaline.
Where present, the BC horizon has hue of 2.5YR or 5YR, value of 4 or 5, and chroma of 3 to 6. The BC horizon is silty clay loam or clay loam with clay content ranging from 27 to 40 percent. The BC horizon ranges from neutral through moderately alkaline.
The Cr horizon has hue of 2.5YR or 5YR, value of 4 or 5, and chroma of 4 to 8. It is slightly alkaline or moderately alkaline and is noncalcareous in some pedons. The Cr material is interbedded siltstone, shale, and sandstone that is paralithic and has high excavation difficulty. Fractures are greater than 10 cm apart. The material is dense enough to be root restrictive. Most of this material slakes in water within 15 hours.
COMPETING SERIES: These are the Grant and Vanoss series. Grant soils have sola more than 40 inches thick. Vanoss soils have a Bt2 horizon in hue of 7.5YR or 10YR and have sola of more than 40 inches thick. In addition Grant and Vanoss soils have a higher clay activity class.
GEOGRAPHIC SETTING: Kingfisher soils are on very gently sloping through sloping uplands. Slope gradients are 0 to 8 percent. These soils formed in material weathered from silty shale red beds of the Central Rolling Red Prairies (MLRA 80A). The climate is dry or moist subhumid. Average Annual Precipitation: 26 to 38 inches. Mean Annual Temperature: 58 to 63 degrees F. Thornthwaite Annual P-E indices: 44 to 64. Frost free days range from 200 to 230. Elevation ranges from 700 to 1500 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the Bethany, Grainola, Grant, Ironmound, Lucien, Nash, Norge, Piedmont, Pond Creek, and Renthin series. Bethany, Grant, and Nash soils are on nearby landscapes. Norge and Pond Creek soils are on lower landscapes of high stream terraces. Grainola soils are on similar landscapes. Lucien, Ironmound, Piedmont, and Renthin soils are on adjacent landscapes usually in more sloping areas. Grainola soils lack a mollic epipedon and have more than 35 percent clay in the textural control section. Lucien and Ironmound soils lack a Bt horizon and are less than 20 inches thick over sandstone. In addition, Ironmound soils lack a mollic epipedon. Nash soils lack a Bt2 horizon and contain less than 18 percent clay in the control section. Piedmont and Renthin soils have more than 35 percent clay in the textural control section.
DRAINAGE AND PERMEABILITY: Well drained; moderately slow permeability; runoff is medium on 0 to 1 percent slopes, high on 1 to 5 percent slopes and very high on 5 to 8 percent slopes.
USE AND VEGETATION: Except for the sloping areas, almost entirely under cultivation; used principally for growing winter wheat. Original vegetation was tallgrass prairie.
DISTRIBUTION AND EXTENT: Central Rolling Red Prairies (MLRA 80A) of North-central Oklahoma and probably in south-central Kansas. The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Kingfisher County, Oklahoma; 1960.
REMARKS: Soil Interpretation Record: Series OK0162
Variant OK0289
Diagnostic horizons and features that are recognized in the pedon are:
Mollic epipedon - the zone from the surface of the soil to a depth of 14 inches (A horizon).
Argillic horizon - the zone from 14 inches to a depth of 38 inches (Bt horizons). Paralithic contact - bedrock siltstone, sandstone and shale encountered at a depth of 38 inches (Cr horizon).
Udic-Ustic soil moisture regime.
ADDITIONAL DATA: NSSL data on sample S90OK-083-004 and S90OK-083-005.