LOCATION CROY UTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Natric Durixeralfs
Keys to Soil Taxonomy: Eighth Edition, 1998
TYPICAL PEDON: Croy loam, rangeland, in a slight depression. (Colors are for dry soil unless otherwise noted.)
A--0 to 4 inches, light brownish gray (10YR 6/2) loam, dark grayish brown (10YR 4/2) when moist; weak, thin, platy structure that breaks to moderate, fine, granular structure; soft, very friable, slightly sticky and slightly plastic; abundant medium roots; common fine pores; moderately calcareous; moderately alkaline (pH 8.0); clear smooth boundary; horizon 2 to 4 inches thick.
Btn1--4 to 10 inches, brown (7.5YR 5/2) loam, dark brown (7.5YR 3/2) when moist; weak prismatic structure that breaks to moderate, medium subangular blocky structure; hard, friable, sticky and slightly plastic; plentiful fine and medium roots; common fine pores; common thin clay films; moderately calcareous; strongly alkaline (pH 8.8) clear, smooth boundary; horizon 3 to 8 inches thick.
Btn2--10 to 18 inches, brown (7.5YR 5/3) sandy clay loam, dark brown (7.5YR 3/3) when moist; weak prismatic structure that breaks to moderate, medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; few fine roots; common fine and medium pores; common thin clay films; moderately calcareous; very strongly alkaline (pH 9.4); clear, wavy boundary; horizon 6 to 12 inches thick.
Bk1--18 to 24 inches, brown (7.5YR 5/3) sandy loam, dark brown (7.5YR 3/3) when moist; weak, medium subangular blocky structure that breaks to weak, medium granular structure; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; common fine and medium pores; moderately calcareous; very strongly alkaline (pH 9.5); clear, wavy boundary; horizon 4 to 8 inches thick.
Bk2--24 to 32 inches, light brownish gray (10YR 6/2) fine sand, very dark grayish brown (10YR 3/2) when moist; single grain loose non-sticky and non-plastic; few medium roots; few fine pores; moderately calcareous; very strongly alkaline (pH 9.5); abrupt, smooth boundary; horizon 5 to 10 inches thick.
Bqm--32 to 35 inches, light gray to gray (10YR 6/1) indurated hardpan, dark gray (10YR 4/1) when moist; moderately calcareous; few fine and medium pores.
TYPE LOCATION: Weber County, Utah; located about 2,640 feet west and 2,640 feet north of the southeast corner of sec. 8, T. 5 N., R. 2 W.
RANGE IN CHARACTERISTICS:
Soil moisture regime: Xeric moisture regime bordering on aridic.
Soil temperature regime: mesic
Mean annual soil temperature: 45 to 50 degrees F.
Particle-size control section: 20 to 35 percent clay
Depth to duripan: 20 to 40 inches
Water table: depth is 2 to 4 feet; April to October.
A horizon:
Hue: 10YR
Value: 6 dry and 4 moist
Chroma: 2 or 3
Texture: loam
Calcium carbonate equivalent: 0 to 5 percent
SAR: 0 to 13
Reaction: 7.4 to 8.1
Btn horizon:
Hue: 7.5YR
Value: 5 dry and 3 moist
Chroma: 2 or 3
Texture: loam or sandy clay loam
Calcium carbonate equivalent: 0 to 15 percent
SAR: 13 to 30
Reaction: 7.9 to 8.4
Bk horizon:
Hue: 7.5YR or 10YR
Value: 5 or 6 dry, 3 moist
Chroma: 2 or 3
Texture: fine sand or sandy loam
Calcium carbonate equivalent: 5 to 15 percent
SAR: 0 to 13
Reaction: 7.9 to 8.4
Bqm horizon:
Hue: 10YR
Value: 6 dry and 4 moist
Chroma: 1 or 2
Calcium carbonate equivalent: 5 to 15 percent
SAR: 0 to 13
Reaction: 7.9 to 8.4
COMPETING SERIES: These are no competing series.
GEOGRAPHIC SETTING:
Parent material: alluvium and lake sediments derived from a mixture of rocks.
Landform: Slight depressions on low lake terraces.
Slopes: 0 to 1 percent
Elevation: 4,225 to 4,350 feet
Mean annual air temperature: 47 to 52 degrees F.
Mean annual precipitation: 14 to 18 inches.
Frost-free period: 150 to 180 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Warm Springs, Leland, and Airport series.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained, negligible runoff, very slow permeability. These soils are rarely flooded for very brief periods during the months of January to December.
USE AND VEGETATION: Native pasture and rangeland; the native vegetation consists of saltgrass, alkali sacaton, scattered greasewood, and foxtail barley.
DISTRIBUTION AND EXTENT: Northern Utah. MLRA 28A. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona.
SERIES ESTABLISHED: Weber County, Utah. 1965.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: The zone from 0 to 4 inches. A horizon.
Natric horizon: The zone from 4 to 18 inches. Btn1 and Btn2 horizons.
Duripan: The zone from 32 to 35 inches. Bqm horizon.
Water table: The presence of a water table from 2 to 4 feet during the months of April to October.