LOCATION CROXELL WY
Tentative Series
IRD. DEW-JCK
03/2017
CROXELL SERIES
The Croxell series consist of very deep, moderately well drained soils that formed in alluvium. These soils are on stream terraces and flood-plain steps. Slopes are from 0 to 4 percent. Mean annual precipitation is about 191 mm, and mean annual air temperature is about 7 degrees C.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aquic Natrargids
TYPICAL PEDON: Croxell sandy loam, 3 percent slope in rangeland at an elevation of 1,464 meters. (Colors are for dry soil unless otherwise noted.)
A--0 to 8 cm; dark grayish brown (10YR 4/2) sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine roots throughout; slightly effervescent; strongly alkaline (pH 9.0); clear smooth boundary. (5 to 15 cm thick)
Btn1--8 to 22 cm; grayish brown (10YR 5/2) sandy clay loam, dark grayish brown (10YR 4/2) moist; moderate fine prismatic structure parting to moderate medium subangular blocky; moderately hard, firm, moderately sticky and moderately plastic; many very fine roots throughout, common very fine dendritic tubular pores; 26 percent distinct clay films on all faces of peds; slightly effervescent; strongly alkaline (pH 8.8); gradual smooth boundary.
Btn2--22 to 50 cm; grayish brown (10YR 5/2) sandy clay loam, dark grayish brown (10YR 4/2) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots throughout, common very fine dendritic tubular pores; 20 percent distinct clay films on all faces of peds; 5 percent 5YR 5/6 oxidized iron masses; slightly effervescent; strongly alkaline (pH 8.5); clear smooth boundary. (combined thickness of Btn horizons is 23 to 65 cm)
C--50 to 120 cm; light brownish gray (10YR 6/2) sandy loam, dark grayish brown (10YR 4/2) moist; massive; soft, very friable, slightly sticky and slightly plastic; few very fine roots throughout, few very fine dendritic tubular pores; 10 percent 5YR 5/4 oxidized iron masses, 15 percent 2.5Y 6/2 iron depletions; slightly effervescent; moderately alkaline (pH 8.0); gradual wavy boundary. (40 to 100 cm thick)
Cg--120 to 200 cm; greenish gray (10Y 5/1) very gravelly sandy loam, very dark greenish gray (10Y 3/1) moist; single grain; loose, nonsticky and nonplastic; 2 percent 10YR 3/1 manganese masses, 5 percent 5YR 5/4 oxidized iron masses, 25 percent 2.5Y 6/1 iron depletions; 40 percent gravel; slightly alkaline (pH 7.8)
TYPE LOCATION: Park County, Wyoming; 364 meters south and 113 meters east of the northwest corner of section 23, T. 51N., R. 98W.; YU Bench NE USGS quadrangle; latitude 44 degrees 22 minutes 57.37 seconds N. and longitude 108 degrees 36 minutes 45.61 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 8 to 10 degrees C
Depth to seasonal high water table - 90 to 180 cm
Depth to seasonal high, irrigation-induced water table - 45 to 90 cm
Rock fragments - 0 to 15 percent gravel in the particle-size control section; 15 to 60 percent in the lower part of the subsoil
A horizon
Hue: 7.5YR to 2.5Y
Value: 4, 5 or 6 dry; 3 or 4 moist
Chroma: 2 or 3
Texture: sandy loam, fine sandy loam, loam or sandy clay loam
Clay content: 12 to 24 percent
Rock fragments: 0 to 15 percent gravels
Electrical conductivity: 0 to 4 mmhos/cm
Sodium absorption ratio: 0 to 13 percent
Reaction: 7.8 to 9.0
Btn horizons
Hue: 7.5YR to 2.5Y
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 2 or 3
Texture: sandy clay loam, loam or clay loam
Clay content: 20 to 35 percent
Rock fragments: 0 to 15 percent gravels
Electrical conductivity: 0 to 4 mmhos/cm
Sodium absorption ratio: 13 to 40 percent
Reaction: 8.6 to 9.0
C horizon
Hue: 7.5YR to 2.5Y
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 2 or 3
Texture: sandy loam, fine sandy loam, or loam
Clay content: 10 to 18 percent
Rock fragments: 0 to 15 percent gravels
Electrical conductivity: 0 to 4 mmhos/cm
Sodium absorption ratio: 0 to 13 percent
Reaction: 7.8 to 8.6
Cg horizon
Hue: 5Y to 10Y
Value: 5 or 6 dry; 4 or 5 moist
Chroma: 1 or 2
Texture: sandy loam, fine sandy loam, or loam
Clay content: 10 to 18 percent
Rock fragments: 15 to 60 percent gravels
Electrical conductivity: 0 to 4 mmhos/cm
Sodium absorption ratio: 0 to 13 percent
Reaction: 7.8 to 8.4
COMPETING SERIES:
Garsox (ID) - have a calcic horizon; have a horizon of secondary silica accumulation
Gurdugee (NV) - have horizons or secondary calcium carbonate accumulation; have a horizons of secondary silica accumulation
Honlak (CA) - have horizons or secondary calcium carbonate accumulation; have a horizons of secondary silica accumulation
GEOGRAPHIC SETTING:
Landform - stream terraces and flood-plain steps
Elevation - 1,085 - 1,500 meters
Slope - 0 to 4 percent slopes
Parent material - alluvium
Mean annual precipitation - 127 to 229 mm
Mean annual air temperature - 6 to 8 degrees C
Frost-free period - 110 to 150 days
GEOGRAPHICALLY ASSOCIATED SOILS: None
DRAINAGE AND PERMEABILITY: Moderately well drained; moderate to moderately slow permeability.
USE AND VEGETATION: Croxell soils are primarily used for livestock grazing and wildlife habitat. Native vegetation is alkali sacaton, saltgrass, Sandberg bluegrass, and slender wheatgrass. Common shrubs are greasewood and rubber rabbitbrush.
DISTRIBUTION AND EXTENT: Croxell soils are of small extent in northwestern Wyoming. MLRA 32.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Park County, Wyoming; 2016. The name is taken from a local irrigation canal.
REMARKS:
Ochric epipedon - from 0 to 8 cm (A horizon)
Argillic horizon - from 8 to 50 cm (Btn1 and Btn2 horizons)
Redoximorphic concentrations - from 22 to 200 cm (Btn2, C and Cg horizons)
Redoximorphic depletions - from 50 to 200 cm (C and Cg horizons)
Particle-size control section - from 8 to 50 cm (Btn1 and Btn2 horizons)
Croxell soils have a mesic temperature regime and an aridic moisture regime.
National Cooperative Soil Survey
U.S.A.