LOCATION CLARK KS

Established Series
Rev. JCW, RMM, DJK
07/2020

CLARK SERIES

The Clark series consists of very deep, well drained soils that formed in alluvium. Clark soils are on paleoterraces on river valleys in the Great Bend Sand Plains, MLRA 79. Slopes range from 0 to 15 percent. Mean annual precipitation is about 760 millimeters (30 inches) and the mean annual temperature is about 13 degrees C (56 degrees F).

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Udic Calciustolls

TYPICAL PEDON: Clark loam, on a 1 percent slope in cropland at an elevation of 1640 feet (500 meters). (Colors are for dry soil unless otherwise noted.)

Ap--0 to 28 centimeters (0 to 11 inches); very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; weak fine granular structure; hard, friable, slightly sticky and slightly plastic; common very fine and fine roots throughout; 21 percent clay; strongly effervescent throughout (HCl, unspecified); moderately alkaline; clear wavy boundary. (10 to 36 centimeters (4 to 14 inches) thick)

Bw--28 to 41 centimeters (11 to 16 inches); brown (10YR 5/3) loam, brown (10YR 4/3) moist; moderate medium granular structure; hard, friable, slightly sticky and slightly plastic; common very fine and fine roots throughout; 27 percent clay; few medium and coarse rounded carbonate concretions; strongly effervescent throughout (HCl, unspecified); moderately alkaline; clear wavy boundary. (0 to 20 centimeters (0 to 8 inches) thick)

Bk1--41 to 71 centimeters (16 to 28 inches) thick); very pale brown (10YR 7/3) loam, brown (10YR 5/3) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots throughout; 21 percent clay; many fine and medium irregular carbonate concretions throughout; violently effervescent throughout (HCl, unspecified); moderately alkaline; gradual wavy boundary.

Bk2--71 to 114 centimeters (28 to 45 inches); very pale brown (10YR 7/4) fine sandy loam, light yellowish brown (10YR 6/4) moist; weak fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common very fine roots throughout; 17 percent clay; many medium and coarse irregular white (10YR 8/1) carbonate nodules throughout; violently effervescent throughout (HCl, unspecified); strongly alkaline; gradual wavy boundary. (Combined thickness of the Bk horizons is 38 to 102 centimeters (15 to 40 inches) thick)

BCk1--114 to 165 centimeters (45 to 65 inches); very pale brown (10YR 8/4) fine sandy loam, very pale brown (10YR 7/4) moist; massive; hard, friable, nonsticky and nonplastic; 9 percent clay; many medium irregular carbonate threads throughout; violently effervescent throughout (HCl, unspecified); strongly alkaline; gradual wavy boundary. (0 to 64 centimeters (0 to 25 inches) thick)

BCk2--165 to 200 centimeters (65 to 80 inches); reddish yellow (7.5YR 6/6) very fine sandy loam, strong brown (7.5YR 5/6) moist; massive; hard, friable, nonsticky and nonplastic; 8 percent clay; common medium and coarse irregular carbonate threads throughout; violently effervescent throughout (HCl, unspecified); strongly alkaline.

TYPE LOCATION: Reno County, KS; about 9.7 kilometers (6 miles) south of Arlington; located about 30 meters (100 feet) north and 46 meters (150 feet) west of the southeast corner of sec. 1, T. 26 S., R. 08 W.; Pretty Prairie SW USGS quad; lat. 37 degrees 48 minutes 22 seconds N. and long. 98 degrees 8 minutes 14 seconds W.,

RANGE IN CHARACTERISTICS:
Soil moisture regime: ustic moisture regime bordering on udic
Soil temperature regime: mesic
Mean annual soil temperature: 13 to 14 degrees C (56 to 58 degrees F).
Particle-size control section: 15 to 30 percent clay
Depth to calcic horizon: 25 to 49 centimeters (10 to 19 inches)
Depth to secondary calcium carbonate: 0 to 30 centimeters (0 to 12 inches)
Thickness of the mollic epipedon: 25 to 49 centimeters (10 to 19 inches)
Thickness of the calcic horizon: 89 to 200 centimeters (35 to 80 inches)
Thickness of the cambic horizon: 0 to 36 centimeters (0 to 14 inches)

Ap horizon:
Hue: 7.5YR or 10YR
Value: 3 to 5 dry, 2 or 3 moist
Chroma: 1 to 3
Texture: loam, clay loam, and fine sandy loam
Clay content: 15 to 30 percent
Sand content: 40 to 65 percent
Rock fragments: 0 to 10 percent
Calcium carbonate equivalent: 5 to 10 percent
Reaction: slightly alkaline to strongly alkaline

Bw horizon:
Hue: 7.5YR or 10YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 2 to 4
Texture: loam, clay loam, or fine sandy loam
Clay content: 18 to 30 percent
Sand content: 40 to 60 percent
Rock fragments: 0 to 10 percent
Calcium carbonate equivalent: 5 to 10 percent
Reaction: slightly alkaline to strongly alkaline

Bk horizon:
Hue: 7.5YR or 10YR
Value: 4 to 7 dry, 3 to 6 moist
Chroma: 2 to 4
Texture: loam, clay loam, or fine sandy loam
Clay content: 15 to 30 percent
Sand content: 40 to 60 percent
Rock fragments: 0 to 15 percent
Calcium carbonate equivalent: 15 to 40 percent
Reaction: moderately alkaline or strongly alkaline

BCk horizon:
Hue: 5YR to 10YR
Value: 5 to 8 dry, 4 to 7 moist
Chroma: 2 to 8
Texture: fine sandy loam, very fine sandy loam, loam, or clay loam
Clay content: 10 to 30 percent
Sand content: 40 to 75 percent
Rock fragments: 0 to 15 percent
Calcium carbonate equivalent: 15 to 25 percent
Reaction: moderately alkaline or strongly alkaline

COMPETING SERIES: There are no competing soils.

GEOGRAPHIC SETTING:
Parent material: alluvium derived from calcareous material
Landform: Paleoterraces on river valleys
Slopes: 0 to 15 percent
Elevation: 430 to 680 meters (1410 to 2230 feet)
Mean annual air temperature: 13 to 14 degrees C (55 to 58 degrees F).
Mean annual precipitation: 660 to 760 millimeters (26 to 30 inches)
Precipitation pattern: Precipitation is usually evenly distributed throughout the year with the exception of November through February being the driest months and May and June being the wettest months. Summer precipitation occurs during intense summer thunderstorms.
Frost-free period: 175 to 200 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kanza, Ninnescah, Ost, and Shellabarger soils.
The Kanza and Ninnescah soils are on floodplains, have sandier textures, and are poorly or somewhat poorly drained. The Ost soils are on similar landform positions, have an argillic horizon, and are deeper to a calcic horizon. The Shellabarger soils are on similar landform positions, have an argillic horizon, but do not have a calcic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: well drained
Runoff: low to medium
Saturated Hydraulic Conductivity: moderately high

USE AND VEGETATION: Most areas are cultivated.
Principal crops are wheat, sorghum, and alfalfa.
Native vegetation is tall prairie grasses.

DISTRIBUTION AND EXTENT: South Central Kansas; Land Resource Region H, Central Great Plains Winter Wheat and Range Region; MLRA 79, Great Bend Sand Plains. The series is of large extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Salina, Kansas

SERIES ESTABLISHED: Reno County, Kansas, 1910

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 28 centimeters (0 to 11 inches) (Ap)
Cambic horizon: 28 to 41 centimeters (11 to 16 inches) (Bw)
Calcic horizon: 41 to 203 centimeters (16 to 80 inches) (Bk1, Bk2, BCk1, BCk2)

ADDITIONAL DATA: Typical pedon site ID: 76KS155002R
Additional KSSL Data: S76KS155002.

1. Added very deep to the first paragraph.
2. Added wet consistence to typical pedon
3. Removed all series that are not in the same family.
4. Revised the Geographically Association Soils paragraph.

12/2012 DJK - Edited climate data in intro and geographic setting. Added clay, sand, and rock fragments to horizons in RIC. Updated geographically associated soils (deleted Avans, Bethany, Blanket, Case, Farnum, Naron, and Penalosa and added Kanza, Ninniscah, and Shellabarger). Edited runoff to actual classes. Added cambic horizon to remarks. Removed central Oklahoma from Distribution and Extent.

National Cooperative Soil Survey
U.S.A.