LOCATION BOTERO WYTentative Series
TAXONOMIC CLASS: Coarse-loamy, carbonatic, frigid Typic Calciustepts
TYPICAL PEDON: Botero loam on a northeast facing linear slope of 1 percent on wooded rangeland at an elevation of 2,194 meters (7,200 feet). (Colors are for dry soil unless otherwise stated.) When described on June 19, 2003, the soil was moist throughout.
A--0 to 8 cm (0 to 3 inches); light gray (10YR 7/2) crushed, loam, grayish brown (2.5Y 5/2) crushed, moist; moderate thin platy structure parting to weak fine granular; very friable, soft, slightly sticky, slightly plastic; common fine roots throughout; many fine vesicular pores; carbonate, finely disseminated; strongly effervescent (64 percent calcium carbonate equivalent); strongly alkaline (pH 8.8); clear smooth boundary. (5 to 15 cm, or 2 to 6 inches thick)
Bw1--8 to 33 cm (3 to 13 inches); light gray (10YR 7/2) crushed, clay loam, grayish brown (2.5Y 5/2) crushed, moist; moderate medium angular blocky structure parting to moderate fine angular blocky; very friable, soft, slightly sticky, slightly plastic; common fine roots throughout and common medium roots throughout; many fine tubular pores; carbonate, finely disseminated; strongly effervescent (67 percent calcium carbonate equivalent); moderately alkaline (pH 8.1); gradual wavy boundary.
Bw2--33 to 64 cm (13 to 25 inches); light gray (2.5Y 7/2) crushed, clay loam, grayish brown (2.5Y 5/2) crushed, moist; moderate coarse and medium angular blocky structure parting to moderate fine angular blocky; very friable, soft, slightly sticky, slightly plastic; common fine roots throughout and common medium roots throughout and common coarse roots throughout; many fine tubular pores; carbonate, finely disseminated; strongly effervescent (53 percent calcium carbonate equivalent); moderately alkaline (pH 8.0); clear wavy boundary. (Combined thickness of the Bw horizon is 18 to 71 cm or, 7 to 28 inches)
Bk1--64 to 76 cm (25 to 30 inches); light gray (10YR 7/2) crushed, silt loam, grayish brown (2.5Y 5/2) crushed, moist; moderate medium angular blocky structure parting to weak fine angular blocky; very friable, soft, slightly sticky, slightly plastic; common fine roots throughout and common medium roots throughout; many fine tubular pores; carbonate, finely disseminated and 5 percent fine distinct threadlike weakly cemented light gray (10YR 7/2), dry, carbonate masses throughout; violently effervescent (66 percent calcium carbonate equivalent); moderately alkaline (pH 7.9); gradual wavy boundary. (10 to 38 cm, or 4 to 15 inches thick)
2Bk2--76 to 97 cm (30 to 38 inches); reddish brown (2.5YR 5/4) crushed, very gravelly sandy loam, reddish brown (2.5YR 4/4) crushed, moist; weak fine angular blocky structure, and weak medium angular blocky structure; very friable, slightly hard, slightly sticky, nonplastic; many fine interstitial pores; 10 percent discontinuous prominent pink (5YR 7/3), moist, carbonate coats on bottom surfaces of rock fragments; carbonate, finely disseminated and 5 percent fine distinct threadlike weakly cemented light gray (10YR 7/2), dry, carbonate masses throughout; 5 percent stones and 15 percent cobbles and 25 percent gravel; strongly effervescent (4 percent calcium carbonate equivalent); strongly alkaline (pH 8.5); clear wavy boundary. (0 to 25 cm, or 0 to 10 inches thick)
2Bk3--97 to 203 cm (38 to 80 inches); yellowish red (5YR 5/6) crushed, extremely cobbly loamy sand, reddish brown (5YR 5/4) crushed, moist; massive; loose, nonsticky, nonplastic; many fine interstitial pores; 15 percent discontinuous prominent pink (5YR 7/3), moist, carbonate coats on bottom surfaces of rock fragments; carbonate, finely disseminated and 15 percent fine prominent irregular weakly cemented pinkish gray (7.5YR 7/2), dry, carbonate concretions throughout; 5 percent stones and 25 percent gravel and 35 percent cobbles; violently effervescent(8 percent calcium carbonate equivalent); strongly alkaline (pH 8.5).
TYPE LOCATION: Uinta County, Wyoming; about 11.3 kilometers (7 miles) south and 11.3 kilometers (7 miles) west of Mountain View, WY; about 1,700 feet east and 1,700 feet south of the northwest corner of Sec. 15, T. 15 N., R. 116 W.; USGS Robertson, WY topographic quadrangle, NAD83; 41 degrees 11 minutes 31.60 seconds north latitude and 110 degrees 28 minutes 52.00 seconds west longitude.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is driest from July to September, and usually moist in the other months; ustic moisture regime.
Mean annual soil temperature: 5.0 to 7.2 degrees C. (41 to 45 degrees F.)
Depth to cambic horizon 5 to 15 cm (2 to 6 inches)
Depth to calcic horizon 51 to 76 cm (20 to 30 inches)
Depth to lithologic discontinuity 64 to 102 cm (25 to 40 inches)
Depth to endosaturation 91 to 127 cm (36 to 50 inches) from May to July
Thickness of the ochric epipedon 5 to 15 cm (2 to 6 inches)
Thickness of the calcic horizon 15 to 25 cm (6 to 10 inches)
Thickness of the cambic horizon 18 to 71 cm (7 to 28 inches)
Particle-size control section (weighted averages):
Noncarbonate clay content: 5 to 12 percent
Rock fragment content: 1 to 20 percent
A horizon
Hue: 10YR or 2.5Y
Value: 4 to 7 dry; 2 to 5 moist
Chroma: 1 to 3, dry or moist
Clay content: 20 to 27 percent; carbonate clay content 10 to 25 percent
Reaction: 7.9 to 9.0 (moderately alkaline or strongly alkaline)
Calcium carbonate equivalent: 50 to 75 percent
Exchangeable sodium: 13 to 30
Sodium absorption ratio: 5 to 13
Bw horizons
Hue: 10YR or 2.5Y
Value: 4 to 7 dry, 2 to 5 moist
Chroma: 1 to 3, dry or moist
Texture: clay loam, loam, silty clay loam
Clay content: 20 to 35 percent; carbonate clay content 15 to 25 percent
Rock fragments: 0 to 3 percent gravel
Reaction: 7.9 to 9.0 (moderately alkaline or strongly alkaline)
Calcium carbonate equivalent: 50 to 75 percent
Exchangeable sodium: 0 to 5
Sodium absorption ratio: 0 to 5
Bk horizon
Hue: 10YR to 2.5Y
Value: 4 to 7 dry, 3 to 5 moist
Chroma: 1 to 3, dry or moist
Texture: clay loam, loam, or silt loam
Clay content: 20 to 30 percent; carbonate clay content 15 to 25 percent
Rock fragments: 0 to 10 percent0 to 10 percent gravel, 0 to 5 percent cobble
Reaction: 7.9 to 9.0 (moderately alkaline or strongly alkaline)
Calcium carbonate equivalent: 50 to 75 percent
Exchangeable sodium: 0 to 5
Sodium absorption ratio: 0 to 5
2Bk horizon, upper part
Hue: 7.5YR, 5YR, or 2.5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 3 or 4, dry or moist
Texture: very gravelly sandy loam
Clay content: 5 to 12 percent; carbonate clay content 1 to 2 percent
Rock fragments: 35 to 60 percent15 to 40 percent gravel, 10 to 20 percent cobble, 0 to 10 percent stones
Reaction: 7.9 to 9.0 (moderately alkaline or strongly alkaline)
Calcium carbonate equivalent: 1 to 10 percent
Exchangeable sodium: 0 to 5
Sodium absorption ratio: 0 to 5
2Bk horizon, lower part
Hue: 7.5YR, 5YR, or 2.5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 3 or 4, dry or moist
Texture: extremely cobbly loamy sand, very cobbly coarse sand, extremely cobbly sand
Clay content: 2 to 10 percent, carbonate clay content 1 to 4 percent
Rock fragments: 35 to 80 percent15 to 40 percent gravel, 20 to 35 percent cobble, 0 to 10 percent stones
Reaction: 7.9 to 9.0 (moderately alkaline or strongly alkaline)
Calcium carbonate equivalent: 1 to 10 percent
Exchangeable sodium: 0 to 5
Sodium absorption ratio: 0 to 5
COMPETING SERIES: There are no competing series currently recognized. The Henrysfork series, in a closely related family, does not have a calcic horizon and is in a fine-loamy class.
GEOGRAPHIC SETTING:
Landform flood plains
Parent material alluvium over outwash
Elevation 1,890 to 2,255 meters (6,200 to 7,400 feet)
Slope 0 to 2 percent
Mean annual precipitation 305 to 432 millimeters (12 to 17 inches)
Mean annual air temperature 3.9 to 6.1 degrees C (39 to 43 degrees F)
Frost-free period 60 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Groshon soils occur on similar positions as Botero and have mollic epipedons and argillic horizons.
Lachapella soils occur on similar positions as Botero and have mollic epipedons and do not have calcic horizons.
Lassel soils occur on similar positions as Botero and have mollic epipedons and do not have calcic horizons.
DRAINAGE AND PERMEABILITY: Moderately well drained. Permeability is moderate in the in the upper part and very rapid in the lower part. Runoff is negligible to low. Flood hazard is rare. Depth to water table is 36 to 50 inches from May to July.
USE AND VEGETATION: These soils are used principally as forested rangeland, irrigated hayland, or irrigated pasture. Principal vegetation includes Engelmann spruce, Rocky Mountain juniper, potentilla, western wheatgrass, Sandberg bluegrass, sedge, rush, and Indian ricegrass.
DISTRIBUTION AND EXTENT: Present known distribution limited to the southwestern part of Wyoming. MLRA 34A. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: The Soil Survey of Uinta County, Wyoming, 2003. Series name taken from the name of an irrigation ditch in Uinta County.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: from 0 to 8 cm. (A horizon)
Cambic horizon: from 8 to 64 cm. (Bw1, Bw2 horizons)
Calcic horizon: from 76to 97 cm. (Bk1 horizon)
Endosaturation: The zone of saturation at 102 to 203 cm.
Lithologic discontinuity: At the upper boundary of the 2Bk2 horizon because of the change in color and texture.
Carbonatic mineralogy: a weighted average of 41 percent calcium carbonate equivalent in the mineralogy control section.
Series control section: The zone from the surface to 150 cm.
Particle-size control section: The zone from 25 to 100 cm. (part of the Bw1, the Bw2, Bk1, 2Bk2, and part of 2Bk3 horizons)