LOCATION DASTRUP UTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Typic Calcixerolls
TYPICAL PEDON: Dastrup loam, on an east facing convex, 18 percent slope in an alfalfa field at an elevation of 6000 feet. (Colors are for moist soil unless otherwise noted.) When described on September 25, 1975, the soil was dry throughout.
A--0 to 12 inches; very dark grayish brown (10YR 3/2) loam, brown (10YR 5/3) dry; moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine vesicular pores; slightly effervescent; carbonates are disseminated; slightly alkaline (pH 7.6); abrupt smooth boundary. (10 to 20 inches thick)
Bw--12 to 16 inches; dark grayish brown (10YR 4/2) clay loam, pale brown (10YR 6/3) dry; strong fine and medium subangular blocky structure; hard, firm, moderately sticky and moderately plastic; few very fine, fine and medium roots; common fine tubular pores; strongly effervescent; carbonates are disseminated; slightly alkaline (pH 7.6); abrupt smooth boundary. (4 to 8 inches thick)
Bk1--16 to 36 inches; yellowish brown (10YR 5/4) loam, very pale brown (10YR 7/4) dry; moderate medium and coarse subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few very fine, fine and medium roots; few very fine tubular pores; strongly effervescent; carbonates are disseminated and veined; moderately alkaline (pH 7.9); clear smooth boundary. (10 to 20 inches thick)
Bk2--36 to 48 inches; yellowish brown (10YR 5/4) loam, very pale brown (10YR 7/4) dry; moderate medium and coarse subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few very fine roots; few very fine tubular pores; strongly effervescent; carbonates are disseminated and veined; moderately alkaline (pH 8.4); abrupt wavy boundary. (10 to 20 inches thick)
Bk3--48 to 60 inches; very pale brown (10YR 7/4) loam, very pale brown (10YR 8/2) dry; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; many very fine tubular pores; strongly effervescent; carbonates are disseminated and veined; moderately alkaline (pH 8.4).
TYPE LOCATION: Summit County, Utah; about 1.5 miles west of Coalville; located about 2,400 feet west and 1,700 feet north of the southeast corner of sec. 7, T. 2 N., R. 5 E.; Coalville, Utah USGS quad; lat. 40 degrees 55 minutes 08 seconds N. and long. 111 degrees 25 minutes 35 seconds W., NAD 1927
RANGE IN CHARACTERISTICS:
Soil moisture regime: Xeric moisture regime bordering on aridic; the soils are dry for more than 60 consecutive days following the summer solstice.
Mean annual soil temperature: 42 to 47 degrees F.
Mean summer soil temperature: 58 to 65 degrees F.
Depth to lithic contact: Greater than 60 inches
Depth to calcic horizon: 10 to 20 inches
Depth to secondary calcium carbonate: 10 to 20 inches
Thickness of the mollic: 10 to 20 inches
Particle-size control section: 18 to 35 percent clay
A horizon:
Hue: 10YR or 7.5YR
Value: 3 or 4 moist, 4 or 5 dry
Chroma: 2 or 3 moist and dry
Rock fragments: 0 to 10 percent
Calcium carbonate equivalent: 1 to 3 percent
Bw and Bk horizons:
Hue: 10YR or 7.5YR
Value: 4 to 7 moist, 6 to 8 dry
Chroma: 2 to 4 moist or dry
Texture: l, sil, cl, grcl
Rock fragments: 5 to 20 percent
Calcium carbonate equivalent: 3 to 40 percent
Reaction: Slightly alkaline or moderately alkaline
COMPETING SERIES: This is the
Watkins Ridge series.
Watkins Ridge (UT): is dry for 45 to 60 consecutive days following the summer solstice.
GEOGRAPHIC SETTING:
Parent material: Alluvium derived from sandstone, siltstone and conglomerate.
Landform: Fan remnants.
Slopes: 2 to 30 percent
Elevation: 5,400 to 6,600 feet
Mean annual air temperature: 40 to 45 degrees F.
Mean annual precipitation: 14 to 16 inches.
Wettest months: March through May
Driest months: July through September.
Frost-free period: 70 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Echocreek,
Jana,
Richsum and
Wanship series.
Echocreek: Well drained soil on stream terraces
Jana: Shallow soil on mountain slopes
Richsum: Deep soil on mountain slopes
Wanship: Somewhat poorly drained soil on stream terraces
DRAINAGE AND PERMEABILITY: Well drained, medium to high runoff, moderate to moderately slow permeability.
USE AND VEGETATION: Alfalfa-grass hay and cattle grazing. Native vegetation includes wheatgrasses, bluegrasses and mountain big sagebrush. This is an upland loam (mountain big sagebrush) ecological site in Utah.
DISTRIBUTION AND EXTENT: North Central Utah. LRR E, MLRA 47. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Summit County, Utah, 2000; Summit Area soil survey. The name is coined.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: The zone from 0 to 12 inches. (A horizon)
Calcic horizon: The zone from 16 to 60 inches. (Bk1, Bk2, and Bk3 horizons)
Keys to Soil Taxonomy: Eighth Edition, 1998
ADDITIONAL DATA: