LOCATION KRUEGER UT

Established Series
Rev. AJE/KDS/SJJ
07/2014

KRUEGER SERIES

The Krueger series consists of very deep, well drained soils that formed in alluvium from andesite, dacite, basalt, and tuff. Krueger soils are on fan remnants and alluvial flats. Slopes are 0 to 15 percent. The average annual precipitation is about 356 mm (14 inches), and the mean annual air temperature is about 7.2 degrees C (45 degrees F).

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Pachic Argixerolls

TYPICAL PEDON: Krueger loam - rangeland. (Colors are for air dry soil unless otherwise noted.)

A--0 to 9 inches (0 to 23 cm); brown (10YR 4/3) loam, very dark brown (10YR 2/2) moist; weak fine granular structure; soft, friable, slightly sticky and slightly plastic; many fine and few medium and coarse roots; few fine pores; slightly alkaline (pH 7.4); clear smooth boundary. (7 to 12 inches (18 to 30 cm) thick)

Bt1--9 to 21 inches (23 to 53 cm); brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; moderate medium angular blocky structure; hard, friable, slightly sticky and slightly plastic; many fine and few medium roots; few fine pores; many thin clay films; slightly alkaline (pH 7.6); clear smooth boundary. (8 to 26 inches (20 to 66 cm) thick)

Bt2--21 to 42 inches (53 to 107 cm); brown (7.5YR 5/4) sandy clay loam, brown (7.5YR 4/2) moist; strong medium angular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; few fine pores; common thin clay films; slightly alkaline (pH 7.8); gradual wavy boundary. (8 to 22 inches (20 to 56 cm) thick)

C--42 to 60 inches (107 to 152 cm); brown (7.5YR 5/4) sandy loam, brown (7.5YR 4/2) moist; massive; hard, friable, slightly sticky and slightly plastic; few fine roots; few fine pores; moderately alkaline (pH 8.0).

TYPE LOCATION: Sevier County, Utah; 3.0 miles north of Koosharem Reservoir; 200 feet east of Utah Highway 24, in the NE1/4 of NE1/4 of NE 1/4 sec. 18, T. 25 S., R. 1 E., SLBM.; USGS Boobe Hole Reservoir 7.5 minute quadrangle; lat. 38 degrees 38 minutes 32.6 seconds N. and long. 111 degrees 49 minutes 55.3 seconds W., NAD 83.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and spring and continuously dry in all parts for significant periods in summer and fall. (Xeric soil moisture regime.)
Mean annual soil temperature: 5.0 to 8.3 degrees C (41 to 47 degrees F)
Mean summer soil temperature: 16.1 to 17.2 degrees C (61 to 63 degrees F)
Thickness of the mollic epipedon: 50 to 91 cm (20 to 36 inches)
Argillic horizon thickness: 41 to 94 cm (16 to 37 inches)
Depth to base of the argillic horizon: 58 to 114 cm (23 to 45 inches)

Particle-size control section (weighted average):
Clay content: 25 to 35 percent
Sand content: More than 15 percent of the particles are fine sand or coarser
Rock fragments: 0 to 15 percent; lithology is andesite, dacite, basalt, and tuff

A horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 2 dry or moist
Texture: Loam, gravelly loam or sandy clay loam
Reaction: Neutral or slightly alkaline

Bt horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5 dry, 2 to 4 moist
Chroma: 3 or 4 dry, 2 or 3 moist
Texture: Clay loam or sandy clay loam
Clay films: Thin to moderately thick clay films
Rock fragments: 0 to 15 percent
Structure: Weak to strong angular, subangular blocky or platy structure
Consistence: Firm or friable
Reaction: Slightly alkaline or moderately alkaline

C horizon:
Hue: 7.5YR or 10YR
Value: 4 to 6, 2 to 4 moist
Chroma: 2 to 4, dry or moist
Texture: Sandy loam, or sandy clay loam
Clay content: 5 to 25 percent
Rock fragments: 0 to 35 percent, mainly gravel
Reaction: Slightly alkaline to strongly alkaline

2C horizon (when present):
Hue: 7.5YR or 10YR
Value: 4 to 6, 2 to 4 moist
Chroma: 2 to 4, dry or moist
Texture: Sandy loam, sand, or sandy clay loam
Clay content: 5 to 25 percent
Rock fragments: 0 to 50 percent, mainly gravel
Reaction: Slightly alkaline to strongly alkaline

COMPETING SERIES: These are the Carey Lake (ID), Dunford (UT), Hades (UT), Hurryback (ID), Lagnaf T (UT), Mahogan (CA), Marotz (ID), Moffspring (ID), Nagle (OR), Needapepper (CA), Sag (OR), Strom (ID), and Tusk (NV) series. Carey Lake soils have relict mottles in the lower part of the profile. Dunford soils have bedrock at 50 to 100 cm (20 to 40 inches). Hades soils have an A horizon more than 50 cm (20 inches) thick and are moderately acid through neutral. Hurryback soils are neutral in the Bt horizon. Lagnaf soils have more than 20 percent rock fragments within the control section. Mahogan soils have bedrock at 75 to 100 cm (30 to 40 inches). Marotz soils have more than 15 percent rock fragments within the control section. Moffspring soils have argillic horizons that are less than 40 cm (15 inches) thick. Nagle soils are dry in all parts of the moisture control section for 60 to 80 consecutive days during summer and early fall. Needapepper soils are usually dry July through early October and have argillic horizons that extend beyond 152 centimeters. Sag soils have bedrock at 100 to 150 cm (40 to 60 inches) and can have up to 25 percent rock fragments in the upper Bt horizon. Strom soils have mottles at a depth of 75 to 113 cm (30 to 45 inches) and are somewhat poorly drained. Tusk soils have 15 to 35 percent rock fragments in the Bt horizon.

GEOGRAPHIC SETTING:
Parent material: Alluvium from andesite, dacite, basalt, and tuff
Landform: Fan remnants and alluvial flats
Slope: 0 to 15 percent
Elevation: 1,981 to 2,490 m (6,500 to 8,150 feet)
Climate: Semiarid
Mean annual precipitation: 305 to 406 mm (12 to 16 inches)
Mean annual temperature: 3.9 to 7.2 degrees C (39 to 45 degrees F)
Frost-free period: 70 to 100 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Acord and Watkins Ridge soils. Acord and Watkins Ridge soils have a mollic epipedon less than 50 cm (20 inches) thick. Also, Acord soils have more than 35 percent rock fragments in the Bt2 horizon. Watkins Ridge soils lack an argillic horizon and have a calcic horizon.

DRAINAGE AND PERMEABILITY: Well drained; low runoff; moderately slow permeability; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: These soils are used for range and irrigated cropland. The native vegetation is big sagebrush, Indian ricegrass, bluebunch wheatgrass, rabbit brush and yellow brush. These soils are correlated to Upland ecological sites in Utah.

DISTRIBUTION AND EXTENT: Central and southern Utah, MLRA 47. The series is inextensive.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Iron County Utah; Iron-Washington Area, 1997.

REMARKS:
Diagnostic horizons and features recognized in this pedon are:

Particle-size control section: 23 to 73 cm.
Mollic epipedon: 0 to 53 cm (0 to 21 inches).
Pachic feature: Mollic horizon thicker than 50 cm (20 inches).
Argillic horizon: 23 to 107 cm (9 to 42 inches).

ADDITIONAL DATA: The NSSL pedon sampled as Krueger is 75UT041002.

Taxonomic Version: Eleventh Edition, 2010.

National Cooperative Soil Survey
U.S.A.