LOCATION YUTRUE IDEstablished Series
The Yutrue series consists of deep and very deep, well drained soils on
basalt plains. They formed in fine textured alluvium and residuum
derived dominantly from basalt. Permeability is very slow. Slopes are
0 to 12 percent. The average annual precipitation is about 14 inches
and the average annual air temperature is about 47 degrees F.
TAXONOMIC CLASS: Fine, smectitic, mesic Vertic Haploxeralfs
TYPICAL PEDON: Yutrue stony clay - rangeland. (Colors are for dry
soil unless otherwise noted.)
A--0 to 2 inches; light brownish gray (10YR 6/2) stony clay, dark
grayish brown (10YR 4/2) moist; weak thin platy structure parting to
moderate very fine granular; hard, friable, very sticky and very
plastic; common very fine, fine and medium roots; many very fine
interstitial pores; neutral (pH 6.9); clear smooth boundary. (1 to 3
inches thick)
BA--2 to 15 inches; light brownish gray (10YR 6/2) clay, dark
grayish brown (10YR 4/2) moist; weak coarse prismatic structure parting
to moderate medium and coarse angular blocky; very hard, very firm,
very sticky and very plastic; few very fine, fine and medium roots;
common fine tubular pores; neutral (pH 7.0); clear smooth boundary.
(11 to 15 inches thick)
Bw--15 to 26 inches; light brownish gray (10YR 6/2) clay, dark
grayish brown (10YR 4/2) moist; moderate coarse prismatic structure
parting to moderate medium angular blocky; very hard, very firm, very
sticky and very plastic; few fine and medium roots; few very fine
tubular pores; neutral (pH 7.2); clear wavy boundary. (10 to 16 inches
thick)
2Btb1--26 to 35 inches; pale brown (10YR 6/3) silty clay loam,
brown (10YR 5/3) moist; weak thick platy structure parting to moderate
medium angular blocky; hard, friable, sticky and plastic; few very fine
and fine roots; many very fine tubular pores; few thin clay films on
faces of peds and in pores; few fine white (N 8/) rounded soft salt
masses; mildly alkaline (pH 7.4); clear wavy boundary. (7 to 12 inches
thick)
2Btb2--35 to 42 inches; pale brown (10YR 6/3) silt loam, brown
(10YR 5/3) moist; moderate fine and medium angular blocky structure;
slightly hard, friable, slightly sticky and slightly plastic; few very
fine and fine roots; common very fine tubular pores; common moderately
thick clay films on faces of peds and in pores that are grayish brown
(10YR 5/2) dry and very dark grayish brown (10YR 3/2) moist; mildly
alkaline (pH 7.6); clear wavy boundary.
2Btkb1--42 to 63 inches; pale brown (10YR 6/3) silt loam, brown
(10YR 5/3) moist; moderate fine prismatic structure parting to moderate
fine and medium angular blocky; slightly hard, friable, slightly sticky
and slightly plastic; few very fine and fine roots; few very fine
tubular pores; many thick clay films on faces of peds and in pores that
are light brownish gray (10YR 6/2) dry and dark grayish brown (10YR
4/2) moist; violently effervescent, lime segregated in common medium
irregular seams; mildly alkaline (pH 7.6); clear wavy boundary. (16 to
25 inches thick)
2Btkb2--63 to 68 inches; brown (10YR 5/3) silt loam, dark brown
(10YR 3/3) broken and brown (10YR 5/3) rubbed, moist; moderate fine
prismatic structure parting to moderate fine and medium angular blocky;
slightly hard, friable, slightly sticky and slightly plastic; few very
fine tubular pores; common thick clay films on faces of peds and in
pores; violently effervescent, lime segregated in common medium
irregular seams; mildly alkaline (pH 7.8).
TYPE LOCATION: Camas County, Idaho; about 2.5 miles southwest of Magic
Reservoir Dam; 1,700 feet west and 2,180 feet south of the northeast
corner of section 26, T. 2 S., R. 17 E.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 47 to 52 degrees F
Depth to bedrock - 40 to more than 60 inches
Vertical cracks - open for more than 60 days or more in the 90 days
following the summer solstice
Rock fragments on the surface - 0 to 30 percent
A and BA horizons
Hue- 10YR or 7.5YR
Value- 5 through 7 dry, 3 through 5 moist
Chroma- 2 through 4 dry or moist
Rock fragments - 0 to 30 percent
Clay content - 35 to 60 percent
Bw and 2Btb horizons
Hue- 10YR or 7.5YR
Value- 5 or 6 dry, 3 through 5 moist
Chroma- 2 through 4 dry or moist
Coarse fragments - 0 to 15 percent
Texture - SICL, C, SIC, SIL
Clay content - 35 to 60 percent
Reaction - neutral to mildly alkaline
2Btkb horizons
Hue- 10YR or 7.5YR
Value- 5 through 8 dry
Value- 4 through 7 moist
Chroma- 1 through 4 dry or moist
Clay content - 25 to 40 percent
Rock fragments - 0 to 5 percent
Texture - SICL, CL, SIL
Calcium carbonate content - 15 to 25 percent
Reaction - mildly alkaline to moderately alkaline
COMPETING SERIES: This is the similiar Oxalis series. Oxalis soils
have thermic soil temperature.
GEOGRAPHIC SETTING: Yutrue soils are on terraces and in shallow
drainageways and concave intermound areas on lava plains. Elevations
are 3,600 to 5,200 feet. The soils formed in residuum and alluvium
weathered from basalt. Average annual precipitation is 11 to 16
inches. Average January temperature is 22 degrees F; average July
temperature is 70 degrees F; average annual temperature is 45 degrees
to 50 degrees F. Frost-free period is 80 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bostrum, Gooding,
Karcal, and Power soils. Bostrum and Karcal soils are 20 to 40 inches
deep to bedrock. Bostrum, Gooding, and Power soils have textural Bt
horizons. These soils occur on the same landscape.
DRAINAGE AND PERMEABILITY: Well drained; slow to rapid runoff; very
slow permeability.
USE AND VEGETATION: Used for rangeland. Vegetation in the potential
natural plant community is Sandberg bluegrass, Idaho fescue, phlox,
alkali sagebrush, and forbs.
DISTRIBUTION AND EXTENT: South-central Idaho. The series is
moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Camas County, Idaho, 1977.
REMARKS: Diagnostic horizons and features recognized in this series
are:
Ochric epipedon - zone from the soil surface to approximately 2
inches. Classification needs to be checked on this soil. It appears
to fit vertisols.
National Cooperative Soil Survey