LOCATION HARTSEL CO
Established Series
Rev. LC/TWH
12/2011
HARTSEL SERIES
The Hartsel series consists of very deep, somewhat poorly drained soils that formed in alluvium. Hartsel soils are on treads of flood-plain steps. Slopes range from 0 to 1 percent. Mean annual precipitation is about 305 mm (12 inches) and the mean annual temperature is about 2.8 degrees C (37 degrees F).
TAXONOMIC CLASS: Fine-loamy, mixed, active Oxyaquic Calcicryepts
TYPICAL PEDON: Hartsel clay, 2 percent slope in grassland at an elevation of 2737 meters. Described on July 1, 1988. (Colors are for dry soil unless otherwise noted.)
Oe--0 to 15 cm (0 to 6 inches); moderately decomposed organic matter; slightly alkaline (pH 7.8).
Ak--15 to 23 cm (6 to 9 inches); white (N 8/0) clay, light brownish gray (2.5Y 6/2) moist; weak fine platy structure; hard, very friable, slightly sticky and slightly plastic, 5 percent gravel; violently effervescent; 63 percent calcium carbonate equivalent; moderately alkaline (pH 8.3); abrupt smooth boundary. (8 to 25 cm thick)
Bk1--23 to 30 cm (9 to 12 inches); white (N 8/0) clay, light brownish gray (2.5Y 6/2) moist; weak fine subangular blocky; slightly hard, very friable, slightly sticky and slightly plastic; 5 percent gravel; violently effervescent; 73 percent calcium carbonate equivalent; strongly alkaline (pH 8.9); abrupt smooth boundary.
Bk2--30 to 56 cm (12 to 22 inches); light gray (N 7/0) gravelly clay, gray (10YR 5/1) moist; weak coarse subangular blocky structure; slightly sticky and slightly plastic; 20 percent gravel; violently effervescent; 71 percent calcium carbonate equivalent; strongly alkaline (pH 8.6); gradual wavy boundary.
Bk3--56 to 79 cm (22 to 31 inches); light gray (2.5Y 7/2) gravelly clay, grayish brown (2.5Y 5/2) moist; weak coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many fine distinct yellowish brown (10YR 5/6) redoximorphic concentrations; 20 percent gravel, 2 percent cobbles; violently effervescent; 49 percent calcium carbonate equivalent; strongly alkaline (pH 8.5); clear smooth boundary. (combined thickness of the Bk horizons: 51 to 76 cm)
2C1--79 to 101 cm (31 to 40 inches); yellow (2.5Y 7/6) very gravelly sandy loam, yellowish brown (10YR 5/6) moist; weak coarse subangular blocky structure; loose, nonsticky and nonplastic; 35 percent gravel, 2 percent cobbles, 1 percent stones; violently effervescent; 7 percent calcium carbonate equivalent; strongly alkaline (pH 8.5); gradual wavy boundary.
2C2--101 to 127 cm (40 to 50 inches); light gray (2.5Y 7/2) very gravelly loam, grayish brown (2.5Y 5/2) moist; weak coarse subangular blocky structure; loose, nonsticky and nonplastic; 35 percent gravel, 2 percent cobbles; violently effervescent; 8 percent calcium carbonate equivalent; strongly alkaline (pH 8.5); gradual wavy boundary. (combined thickness of the 2C horizons is 38 to 58 cm)
3C3--127 to 167 cm (50 to 66 inches); light gray (2.5Y 7/2) extremely gravelly coarse sand, light brownish gray (2.5Y 6/2) moist; single grain; loose, nonsticky and nonplastic; 60 percent gravel, 25 percent cobbles; slightly effervescent; 3 percent calcium carbonate equivalent; strongly alkaline (pH 8.7).
TYPE LOCATION: Park County, Colorado; about 5 kilometers (3 miles) northwest of Hartsel; located about 1,900 feet north and 400 feet east of the southwest corner of Sec. 36, T. 11 S., R. 76 W.; Hartsel USGS quad; lat. 39 degrees 2 minutes 44 seconds N. and long. 105 degrees 50 minutes 44 seconds W. NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: ustic moisture regime
Mean annual soil temperature: 2.8 to 5.0 degrees C. (37 to 41 degrees F.)
Mean summer soil temperature: 10.6 to 14.4 degrees C. (51 to 58 degrees F.)
Depth to calcic horizon: 0 to 20 cm (0 to 8 inches)
Depth to redox concentrations: 31 to 64 cm (12 to 25 inches)
Depth to endosaturation: 31 to 64 cm (12 to 25 inches)
Depth to lithologic discontinuity (loamy-skeletal layer): 51 to 89 cm (20 to 35 inches)
Depth to lithologic discontinuity (sandy-skeletal layer): 114 to 140 cm (45 to 55 inches)
Particle-size control section (weighted averages):
Noncarbonate clay content: 18 to 25 percent
Rock fragment content: 20 to 30 percent
Carbonate content: 20 to 40 percent
Ak horizon
Hue: N, 2.5Y, 10YR
Value: 7 or 8 dry; 6 or 7 moist
Chroma: 0 to 2 dry; 1 to 3 moist
Clay content: 40 to 55 percent
Carbonate clay content: 30 to 35 percent
Gravel content: 5 to 10 percent
Calcium carbonate equivalent: 50 to 75 percent
Electrical conductivity: 0 to 2 mmhos/cm
Bk horizons
Hue: N, 2.5Y, 10YR
Value: 7 or 8 dry; 5 to 7 moist
Chroma: 0 to 2 dry; 1 to 3 moist
Texture: clay, gravelly clay
Clay content: 40 to 59 percent
Carbonate clay content: 20 to 45 percent
Fragment content, total: 5 to 35 percent
Fragment size and content: 5 to 35 percent indurated gravel
0 to 3 percent indurated cobbles
Calcium carbonate equivalent: 49 to 75 percent
Electrical conductivity: 0 to 2 mmhos/cm
Reaction: moderately alkaline or strongly alkaline
2C horizons
Hue: 10YR, 2.5Y
Value: 6 or 7 dry; 5 or 6 moist
Chroma: 2 to 6 dry; 2 to 6 moist
Texture: very gravelly sandy loam, very gravelly loam
Clay content: 12 to 22 percent
Carbonate clay content: 2 to 5 percent
Fragment content, total: 35 to 60 percent
Fragment size and content: 35 to 55 percent indurated gravel
0 to 5 percent indurated cobbles
Calcium carbonate equivalent: 5 to 10 percent
Reaction: moderately alkaline or strongly alkaline
3C horizon
Hue: 10YR, 2.5Y
Value: 6 or 7 dry; 5 or 6 moist
Chroma: 2 to 6 dry; 2 to 6 moist
Clay content: 2 to 8 percent
Carbonate clay content: 0 to 2 percent
Fragment content, total: 60 to 85 percent
Fragment size and content: 50 to 60 percent indurated gravel
10 to 25 percent indurated cobbles
Calcium carbonate equivalent: 3 to 10 percent
Reaction: moderately alkaline or strongly alkaline
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Parent material: alluvium
Landform: treads on flood-plain steps
Slopes: 0 to 1 percent
Elevation: 2713 to 2774 meters (8900 to 9100 feet)
Mean annual temperature: 1.7 to 3.9 degrees C (35 to 39 degrees F)
Mean annual precipitation: 254 to 356 mm (10 to 14 inches)
Precipitation pattern: The soil moisture control section is usually moist in some part during summer and early fall, and intermittently dry in late fall.
Frost-free period: 50 to 80 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Platdon and
Wilkerson series. The Platdon soils are very deep and are on flood-plains. The Wilkerson soils are very deep and are on stream terraces.
DRAINAGE AND PERMEABILITY: somewhat poorly drained, slow permeability, rarely flooded for brief periods during the months of April through August.
USE AND VEGETATION: These soils are used for livestock grazing and wildlife habitat. Native vegetation consists mainly of tufted hairgrass, Nebraska sedge, slender wheatgrass, Baltic rush, and ovalhead sedge.
DISTRIBUTION AND EXTENT: Central Colorado, LRR E, MLRA 48B; small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Park County, Colorado, Teller-Park soil survey area, Colorado, 2010. The name is taken from the town of Hartsel, Colorado.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Series control section: The zone from 0 to 150 cm
Particle-size control section: The zone from 40 to 115 cm (part of the Bk2, the Bk3, and part of the 2C1 horizons)
Calcic horizon: from 15 to 79 cm (Ak, Bk1, Bk2, Bk3 horizons)
Redoximorphic concentrations: from 56 to 79 cm (Bk3 horizons)
Endosaturation: at 56 to 167 cm (Bk3, 2C1, 2C2, 3C3 horizons)
Lithologic discontinuity (loamy-skeletal layer): At the upper boundary of the 2C1 horizon.
Lithologic discontinuity (sandy-skeletal layer): At the upper boundary of the 3C3 horizon.
This soil is in climatic area that is considered an ustic moisture regime bordering aridic; however, the seasonal saturation and the capillary fringe is assumed to put this soil more in the middle of the ustic regime.
Taxonomic Version: Classified according to Keys to Soil Taxonomy, 11th Edition, 2010.
ADDITIONAL DATA: This pedon was sampled for the NSSL, soil survey sample number 88CO093007.
National Cooperative Soil Survey
U.S.A.