LOCATION DRY CANYON IDEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Typic Argixerolls
TYPICAL PEDON: Dry Canyon loam, rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 3 inches; very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; moderate very fine granular structure; soft, very friable, non-sticky and non-plastic; many very fine and fine, common medium roots; many fine interstitial pores; 5 percent gravel; moderately acid (pH 6.0); abrupt smooth boundary. (3 to 6 inches thick)
Bt1--3 to 10 inches; dark brown (7.5YR 3/2) silt loam, very dark brown (7.5YR 2/2) moist; moderate fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine, common medium roots; many very fine interstitial and common very fine tubular pores; few faint clay films on faces of peds; 5 percent gravel; slightly acid (pH 6.2); clear wavy boundary. (6 to 13 inches thick)
Bt2--10 to 18 inches; brown (7.5YR 4/3) silt loam, dark brown (7.5YR 3/3) moist; moderate fine and medium subangular blocky structure; slightly hard, very friable, moderately sticky and moderately plastic; many very fine and fine, common medium roots; common very fine interstitial and many very fine tubular pores; few faint clay films on faces of peds; 5 percent gravel; slightly acid (pH 6.4); clear wavy boundary. (4 to 12 inches thick)
Bt3--18 to 25 inches; brown (7.5YR 5/3) gravelly silty clay loam, dark brown (7.5YR 3/4) moist; moderate very fine and fine subangular blocky structure; hard, friable, moderately sticky and moderately plastic; common very fine, fine and medium roots; common very fine interstitial and many very fine and fine tubular pores; common faint clay films lining pores and on faces of peds; 25 percent gravel; slightly acid (pH 6.4); gradual wavy boundary. (7 to 17 inches thick)
Bt4--25 to 38 inches; brown (7.5YR 5/4) gravelly clay loam, reddish brown (5YR 4/4) moist; moderate very fine and fine subangular blocky structure; hard, friable, moderately sticky and moderately plastic; common very fine, fine and medium roots; common very fine and fine interstitial and tubular pores; common faint clay films lining pores and on faces of peds; 25 percent gravel; neutral (pH 6.6); clear wavy boundary. (0 to 15 inches thick)
Bt5--38 to 48 inches; reddish brown (2.5YR 4/4) gravelly loam, dark reddish brown (2.5YR 3/4) moist; moderate fine and medium subangular blocky structure; hard, friable, moderately sticky and slightly plastic; few very fine and fine roots; common very fine interstitial and few very fine tubular pores; many faint clay films on faces of peds; 15 percent gravel; neutral (pH 6.6); abrupt wavy boundary. (0 to 12 inches thick)
BC--48 to 53 inches; yellowish red (5YR 5/6) loam, yellowish red (5YR 4/6) moist; weak coarse subangular blocky structure; hard, friable, moderately sticky and slightly plastic; very few very fine and fine roots; few very fine interstitial and tubular pores; 5 percent gravel; slightly acid (pH 6.4); abrupt wavy boundary. (0 to 6 inches thick)
Cr--53 inches; weathered red sandstone
TYPE LOCATION: Bear Lake County, Idaho; approximately 5 miles north and 3 miles west of Pegram; about 300 feet north and 2,450 feet east of the southwest corner of section 34, T. 13 S., R. 45 E.; USGS Pegram 7.5 minute topographic quadrangle; latitude - 42 degrees, 14 minutes, 31.6 seconds north, longitude - 111 degrees, 10 minutes, 48.5 seconds west, NAD 83
RANGE IN CHARACTERISTICS:
Soil moisture control section - usually moist, dry in all parts for 45 consecutive days or more in the four months following the summer solstice. Xeric moisture regime.
Thickness of mollic epipedon - 10 to 18 inches (extends into the argillic horizon)
Depth to weathered bedrock - 40 to 60 inches
Average annual soil temperature - 40 to 44 degrees F. Frigid soil temperature regime.
Average summer soil temperature - 60 to 64 degrees F.
Particle-size control section
Clay content - 20 to 35 percent
Rock fragments - 5 to 30 percent
A horizon
Hue - 10YR to 5YR
Value - 3 or 4 dry, 2 or 3 moist
Chroma -2 or 3 dry, 1 to 3 moist
Texture of the fine earth (<2mm) fraction - loam or silt loam
Clay content - 15 to 22 percent
Rock fragment content - 0 to 20 percent (0 to 15 percent gravel, 0 to 5 percent cobbles)
Reaction - pH 5.6 to 6.5
AB, BA or Bw horizons may be present in some pedons
Bt1 and Bt2 horizons
Hue - 7.5YR or 5YR
Value - 3 to 5 dry, 2 to 4 moist
Chroma - 2 to 6 dry, 2 to 4 moist
Texture of the fine earth (<2mm) fraction - loam, silt loam, clay loam, or silty clay loam
Clay content - 18 to 30 percent
Rock fragment content - 5 to 30 percent (5 to 20 percent gravel, 0 to 10 percent cobbles)
Reaction - pH 5.6 to 6.5
Bt3, Bt4, and Bt5 horizons (Bt4 and Bt5 horizons are absent in some pedons)
Hue - 7.5YR to 2.5YR
Value - 4 or 5 dry, 3 or 4 moist
Chroma - 3 to 6 dry, 3 or 4 moist
Textures - gravelly loam, gravelly silt loam, gravelly clay loam or gravelly silty clay loam
Clay content - 23 to 35 percent
Rock fragment content - 15 to 35 percent (15 to 25 percent gravel, 0 to 10 percent cobbles and stones)
Reaction - pH 6.1 to 7.3
BC horizon (where present)
Hue - 7.5YR to 2.5YR
Value - 4 to 6 dry or moist
Chroma - 4 to 6 dry or moist
Texture of the fine earth (<2mm) fraction - loam, silt loam or sandy loam
Clay content - 16 to 22 percent
Rock fragment content - 5 to 35 percent (5 to 25 percent gravel, 0 to 10 percent cobbles and stones)
Reaction - pH 5.6 to 7.3
COMPETING SERIES: These are the:
Alexander (T) (ID) - are moderately deep to basalt and do not have Cr horizons.
Ayoub (UT) - are moderately deep to andesite and do not have Cr horizons.
Cloud Rim (UT) - are very deep.
Cloudless (ID) - are very deep.
Isbell (UT) - have calcareous C horizons.
Jacanyon (T) (ID) - are moderately deep to sandstone and do not have Cr horizons.
Kanlee (ID) - are moderately deep to weathered granite.
Maple Mountain - have calcareous C horizons and do not have Cr horizons.
Paynecreek (ID) - are very deep and have C horizons immediately below the Bt horizons.
Ticino (NV) - are moderately deep to weathered metasedimentary rock.
GEOGRAPHIC SETTING:
Landform: mountain backslopes and alluvial fans (dominantly east aspects)
Elevation: 6,000 to 7,600 feet
Slope: 5 to 50 percent
Parent material: red sandstone, red siltstone or conglomerate derived from these sources
Climate: long, cold winters; moist springs; warm, dry, summers.
Average annual precipitation: 12 to 18 inches
Average annual temperature: 39 to 44 degrees F.
Frost-free season: 70 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the: Cooley, Cupine, Jebo, Rexburg Sheep Creek, and Taylow series.
Cooley soils occur on similar landscape positions, are very deep, have a loamy-skeletal particle-size control section and have Bk horizons.
Cupine soils occur on similar landscape positions and ridges and are moderately deep to bedrock.
Jebo soils occur on ridges, are moderately deep to sandstone and have Bk horizons.
Rexburg soils occur on fan terraces below Dry Canyon soils, have a coarse-silty particle-size control section and have Bk horizons.
Sheep Creek soils occur on similar landscape positions, are moderately deep to bedrock, have a loamy-skeletal particle-size control section and have Bk horizons. Taylow soils occur on ridges and shoulder slopes and are shallow to bedrock.
DRAINAGE AND PERMEABILITY: Well drained; high to very high surface runoff; moderately slow permeability.
USE AND VEGETATION: Dry Canyon soils are used for rangeland and wildlife habitat. The present vegetation is mainly mountain big sagebrush, bluebunch wheatgrass, serviceberry, snowberry, antelope bitterbrush, eriogonum, prairie junegrass, buckwheat and twisted leaf rabbit brush.
DISTRIBUTION AND EXTENT: Southeastern Idaho. These soils are of small extent in MLRA 43B.
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:
Mollic epipedon - The zone from the soil surface to 18 inches (the A, Bt1 and Bt2 horizons).
Argillic horizon - The zone from 3 to 48 inches (the Bt1, Bt2, Bt3, Bt4 and Bt5 horizons).
Paralithic contact - The contact with weathered sandstone bedrock at 53 inches (Cr horizon)
Particle-size control section - 3 to 23 inches (the upper 20 inches of the argillic horizon, the Bt1, Bt2 and part of the Bt3 horizons)