LOCATION CHICKENRIDGE            ID

Established Series
RGK/CBR/EED
05/2018

CHICKENRIDGE SERIES

Landscape--lava fields
Landform--lava flows
Slope--1 to 30 percent
Parent material--colluvium influenced by loess and eolian sand over basalt
Mean annual precipitation--about 480 mm
Mean annual air temperature--about 3 degrees C
Depth class--deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--cryic

TAXONOMIC CLASS: Fine-silty, mixed, superactive Pachic Haplocryolls

TYPICAL PEDON: Chickenridge loam on a 1-percent slope in an area of rangeland at an elevation of 1826 m

A1--0 to 8 cm; loam, very dark grayish brown (10YR 3/2) dry, very dark brown (10YR 2/2) moist; weak very fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine, common fine, and few medium roots; many very fine irregular pores; moderately acid (pH 5.9); clear smooth boundary

A2--8 to 20 cm; loam, dark brown (10YR 3/3) dry, very dark brown (10YR 2/2) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine, common fine, and few medium roots; common very fine irregular pores; slightly acid (pH 6.1); clear wavy boundary

AB--20 to 41 cm; loam, dark brown (10YR 3/3) dry, very dark brown (7.5YR 2.5/2) moist; weak coarse prismatic structure parting to moderate medium and coarse subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; many very fine and few fine and medium roots; common very fine irregular and tubular pores; 1 percent gravel; neutral (pH 6.8); gradual wavy boundary

Bw1--41 to 69 cm; silt loam, brown (10YR 5/3) dry, dark brown (10YR 3/3) moist; weak coarse prismatic structure parting to moderate medium and coarse subangular blocky; hard, friable, slightly sticky and slightly plastic; common very fine and few fine and medium roots; many very fine tubular pores; 1 percent gravel; neutral (pH 7.1); gradual wavy boundary

Bw2--69 to 89 cm; loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; weak coarse and very coarse prismatic structure parting to moderate medium and coarse subangular blocky; hard, friable, slightly sticky and slightly plastic; common very fine and few fine and medium roots; many very fine tubular pores; 1 percent gravel; slightly alkaline (pH 7.4); abrupt wavy boundary

Bk1--89 to 99 cm; loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 4/4) moist; weak coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots; many very fine tubular pores; 1 percent gravel; finely disseminated calcium carbonate in soil matrix; slightly effervescent (10 percent calcium carbonate); moderately alkaline (pH 7.9); abrupt wavy boundary

Bk2--99 to 114 cm; loam, yellowish brown (10YR 5/4) dry, brown (10YR 4/3) moist; weak coarse subangular blocky structure; hard, very friable, slightly sticky and slightly plastic; common very fine roots; many very fine tubular pores; 2 percent gravel; finely disseminated calcium carbonate in soil matrix; strongly effervescent (14 percent calcium carbonate); moderately alkaline (pH 8.0); abrupt wavy boundary

Bk3--114 to 122 cm; very fine sandy loam, very pale brown (10YR 7/3) dry, olive brown (2.5Y 4/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; 4 percent gravel; common very fine threads of calcium carbonate, very pale brown (10YR 8/2) dry, pale brown (10YR 6/3) moist; violently effervescent (40 percent calcium carbonate); moderately alkaline (pH 8.4); abrupt smooth boundary

2R--122 cm; vesicular basalt

TYPE LOCATION: Clark County, Idaho, about 21.2 km south of Kilgore, Idaho; about 565 m south and 318 m west of the northeast corner of section 8, T. 10 N., R. 39 E.; Snowshoe Butte U.S. Geological Survey quadrangle; latitude 44.21172 degrees north, longitude 111.88203 degrees west, datum WGS 84 (coordinates determined with a GPS)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--4 to 7 degrees C
Thickness of mollic epipedon--41 to 69 cm
Depth to calcareous material--74 to 114 cm
Depth to bedrock--100 to 150 cm

Particle-size control section
Clay content--18 to 21 percent
Total rock fragment content--0 to 5 percent gravel
Sand fraction--less than 15 percent particles 0.1 to 2.0 mm in diameter

A horizon
Value--2 or 3 dry or moist
Chroma--2 or 3 dry, 1 to 3 moist
Reaction--5.6 to 6.5 (moderately acid or slightly acid)
Combined thickness--20 to 43 cm

AB horizon
Hue--10YR or 7.5YR moist
Value--2 or 3 dry or moist
Chroma--2 or 3 dry, 1 to 3 moist
Reaction--6.6 to 7.3 (neutral)
Combined thickness--0 to 26 cm

Bw horizon
Value--4 to 6 dry, 3 to 5 moist
Chroma--2 to 4, dry or moist
Texture--loam, silt loam
Clay content--13 to 27 percent
Combined thickness--41 to 69 cm
Total rock fragment content--0 to 5 percent gravel
Reaction--6.1 to 7.6 (slightly acid to slightly alkaline)

Bk1 and Bk2 horizons
Hue--2.5Y, 10YR
Value--5 to 8 dry, 4 to 6 moist
Chroma--2 to 4 dry or moist
Texture--silt loam, loam
Clay content--13 to 27 percent
Total rock fragment content--0 to 5 percent gravel
Calcium carbonate equivalent--3 to 15 percent
Reaction--7.9 to 8.4 (moderately alkaline)

Bk3 horizon
Hue--2.5Y, 10YR
Value--5 to 8 dry, 4 to 6 moist
Chroma--2 to 4 dry or moist
Texture--loam, sandy loam, very fine sandy loam
Clay content--6 to 18 percent
Total rock fragment content--0 to 10 percent gravel
Calcium carbonate equivalent--15 to 40 percent
Reaction--8.0 to 8.4 (moderately alkaline)

COMPETING SERIES: None

GEOGRAPHIC SETTING:
Elevation--1720 to 2000 m
Climate--warm summers, cold winters
Mean annual precipitation--460 to 610 mm
Mean annual air temperature--4 to 5 degrees C
Frost-free period--30 to 70 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Crystalbutte--fine-loamy particle-size class; in fissure vents and on volcanic cones
Katseanes--lithic contact at a depth of less than 50 cm (shallow); on lava flow pressure ridges and tumuli
Stoneman--loamy-skeletal particle-size class; calcic horizon; on Pahoehoe lava flows
Vadnais--lithic contact at a depth of less than 100 cm (moderately deep); on lava flow pressure ridges and tumuli

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--high

USE AND VEGETATION:
Major uses--livestock grazing, wildlife habitat
Potential natural vegetation--mountain big sagebrush, antelope bitterbrush, Idaho fescue, bluegrass, prairie Junegrass, sedges, western wheatgrass, phlox, lupine, aster, buckwheat, western yarrow, bushy bird's-beak

DISTRIBUTION AND EXTENT: Eastern Idaho Plateaus; MLRA 13; moderate extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Clark County, Idaho; 2018

REMARKS:
Diagnostic horizons and features recognized in this pedon
*Mollic epipedon--zone from the surface to a depth of 69 cm
*Cambic horizon--zone from 69 to 89 cm
*Particle size control section--zone from 25 to 100 cm

12/2017--This type location was formerly in the Pinebutte series. Sampling and documentation indicate the classification is Pachic Haplocryolls instead of Pachic Argicryolls.

ADDITIONAL DATA:
Laboratory data--pedon number 06N0043; Kellogg Soil Survey Laboratory, Lincoln, NE

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National Cooperative Soil Survey
U.S.A.