LOCATION CHOKECHERRY IDEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Lithic Haplocryolls
TYPICAL PEDON: Chokecherry very gravelly sandy loam, on a northwest-facing, 18 percent slope in rangeland at an elevation of 2222 meters. (Colors are for dry soil unless otherwise noted.)
A1--0 to 10 cm; very dark grayish brown (10YR 3/2) very cobbly sandy loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; soft, very friable, non-sticky and non-plastic; many very fine and fine and common medium and coarse roots; many very fine and fine irregular pores; 25 percent gravel, 10 percent cobbles and 5 percent stones; neutral (pH 7.0); clear smooth boundary. (5 to 15 cm thick)
A2--10 to 23 cm; very dark grayish brown (10YR 3/2) very cobbly sandy loam, very dark brown (10YR 2/2) moist; weak fine subangular blocky structure parting to moderate fine granular; soft, very friable, non-sticky and non-plastic; common very fine and fine and few medium and coarse roots; many fine irregular pores; 15 percent gravel and 35 percent cobbles; neutral (pH 6.8); gradual wavy boundary. (10 to 20 cm thick)
Bw--23 to 46 cm; brown (10YR 4/3) extremely cobbly sandy loam, dark brown (10YR 3/3) moist; weak very fine and fine subangular blocky structure; soft, very friable, non-sticky and non-plastic; few very fine, fine, medium and coarse roots; many fine irregular pores; 25 percent gravel and 35 percent cobbles; neutral (pH 6.8); abrupt wavy boundary. (0 to 23 cm thick)
R--46 cm; sandstone bedrock.
TYPE LOCATION: Bear Lake County, Idaho; about 7.4 km southeast of Dingle; located about 168 m west and 410 m north of the southeast corner of section 31, T. 14 S., R. 45 E.; USGS Pegram 7.5 minute topographic quadrangle; lat. 42 degrees 9 minutes 27.5 seconds north and long. 111 degrees 13 minutes 51.1 seconds west, NAD 83.
RANGE IN CHARACTERISTICS:
The soil moisture control section is usually moist; but is dry in all parts for 45 to 60 consecutive days in the four months following the summer solstice; xeric moisture regime.
Mean annual soil temperature - 3.9 to 7.2 degrees C.; cryic soil temperature regime
Mean summer soil temperature - less than 15 degrees C.
Thickness of mollic epipedon - 18 to 51 cm (may extend into the Bw horizon)
Depth to bedrock - 25 to 50 cm
Particle-size control section:
Clay content - 10 to 18 percent
Rock fragments - 35 to 90 percent
A1 horizon
Hue - 10YR to 5YR
Value - 3 to 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Clay content - 5 to 18 percent
Rock fragment content - 35 to 60 percent (15 to 50 percent gravel or channers, 5 to 15 percent cobbles, and 0 to 5 percent stones)
Reaction - moderately acid to neutral
A2 horizon
Hue - 10YR to 5YR
Value - 3 to 5 dry, 2 or 3 moist
Chroma -2 or 3 dry or moist
Textures of the fine earth fraction - loamy sand, sandy loam, loam or silt loam
Clay content - 10 to 18 percent
Rock fragment content - 35 to 75 percent (15 to 55 percent gravel and 10 to 40 percent cobbles, stones and/or flagstones
Reaction - moderately acid to neutral
Bw horizon
Hue - 10YR to 5YR
Value - 4 to 6 dry, 2 to 4 moist
Chroma - 2 to 4 dry or moist
Textures of the fine earth fraction - sandy loam, loam or silt loam
Clay content - 12 to 18 percent
Rock fragment content - 35 to 90 percent (15 to 55 percent gravel and 20 to 40 percent cobbles, stones and/or flagstones
Reaction - moderately acid to neutral
Some pedons have an AC horizon in place of a Bw horizon.
Some pedons may have a Cr horizon over an R horizon.
COMPETING SERIES:
Arrowpeak (MT) - have a udic moisture regime
Betemer (CO) - have an ustic moisture regime
Cheadle (MT) - have an ustic moisture regime
Clamp (OR) - have more than 18 percent clay in the particle-size control section
Dalys (T)(MT) - are very shallow
Dollarhide (ID) - are dry in all parts for 60 to 90 consecutive days in the four months following the summer solstice
Eyre (CO+WY) - have an ustic moisture regime
Irigul (WY) - have an ustic moisture regime
Irson (WY) - have more than 18 percent clay in the particle-size control section
Jonlake (NV) - have more than 18 percent clay in the particle-size control section
Labshaft (NV) - have an ustic moisture regime
McCaden (T)(UT) - have secondary calcium carbonate accumulations
Milling (WA) - have a udic moisture regime
Poin (MT+WY) - have an ustic moisture regime
Rogert (CO+UT) - have a udic moisture regime
Schwacheim (CO) - have a udic moisture regime
Starley (WY+ID) - have more than 18 percent clay in the particle-size control section
Topeki (NV) - have more than 18 percent clay in the particle-size control section
Trump (T)(CO) - have secondary calcium carbonate accumulations
Udel (NV) - are very shallow
GEOGRAPHIC SETTING:
Landform: mountain slopes, hillslopes and ridges
Elevation: 1,798 to 2,393 m
Slope: 2 to 60 percent
Parent material: alluvium and residuum derived from red sandstone or red siltstone, yellow sandstone or siltstone, gray siltstone or loess influenced quartzite or rhyolite
Climate: long, cold winters; moist springs; warm, dry, summers
Mean annual precipitation: 330 to 660 mm
Mean annual air temperature: 2.2 to 5.0 degrees C
Frost-free season: 40 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clavicon, Monida and Tubbs Hollow series. Clavicon and Tubbs Hollow soils are moderately deep and occur on similar positions. Monida soils are very deep and are in lower positions on hillslopes
DRAINAGE AND PERMEABILITY: Well drained; very low to medium surface runoff; moderately rapid permeability.
USE AND VEGETATION: Chokecherry soils are used for livestock grazing and wildlife habitat. The present vegetation is mainly mountain big sage, low sage, bluebunch wheatgrass, antelope bitterbrush, serviceberry, snowberry, rabbitbrush, lupine, and few mountain mahogany.
DISTRIBUTION AND EXTENT: Chokecherry soils are of small extent in southeastern and south-central Idaho; MLRA 43B and 13.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Bear Lake County, Idaho, 2008.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 0 to 46 cm (A1, A2, and Bw horizons)
Mollic epipedon - The zone from the soil surface to 46 cm (A1, A2, and Bw horizons).
Lithic contact: sandstone bedrock at 46 cm (R horizon)