LOCATION SPARKY                  ID

Established Series
IRD CBR/EED
05/2018

SPARKY SERIES

Landscape--mountains, hills
Landform--mountain slopes, hillslopes, swales
Slope--1 to 70 percent
Parent material--loess-influenced colluvium derived from mixed sources
Mean annual precipitation--about 900 mm
Mean annual air temperature--about 1.7 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Pachic Haplocryolls

TYPICAL PEDON: Sparky silt loam in an area of forestland (Colors are for dry soil unless otherwise noted.)

Oi--0 to 5 cm; slightly decomposed plant material; diffuse wavy boundary

A--5 to 13 cm; very dark brown (10YR 2/2) silt loam, black (10YR 2/1) moist; moderate fine granular structure; very friable, nonsticky and nonplastic; common fine and very fine roots throughout; 5 percent gravel; neutral (pH 6.6); abrupt wavy boundary

AB--13 to 79 cm; very dark grayish brown (10YR 3/2) gravelly silt loam, very dark brown (10YR 2/2) moist; moderate fine subangular blocky structure; friable, slightly sticky and slightly plastic; common very fine and fine roots throughout; 20 percent gravel and 5 percent cobbles; slightly acid (pH 6.5); clear wavy boundary

Bw1--79 to 150 cm; pale brown (10YR 6/3) very gravelly loam, brown (10YR 4/3) moist; moderate medium subangular blocky structure; friable, slightly sticky and slightly plastic; few very fine roots throughout; 50 percent gravel and 5 percent cobbles; slightly acid (pH 6.4)

TYPE LOCATION: Bannock County, Idaho; latitude 42.78133 degrees north, longitude 112.15617 west, datum WGS 84

RANGE IN CHARACTERISTICS:
Soil moisture control section--dry less than 45 consecutive days during the 4 months following summer solstice
Mean annual soil temperature--2.8 to 6.1 degrees C
Thickness of mollic epipedon--50 to 80 cm
Depth to cambic horizon--20 to 80 cm

Particle-size control section (weighted averages)
Clay content--15 to 22 percent
Total rock fragment content--35 to 60 percent

Oi horizon
Reaction--pH 4.0 to 5.5
Organic matter content--60 to 95 percent
Thickness--3 to 8 cm

A horizon
Value--2 or 3 moist
Chroma--2 to 4 dry, 1 or 2 moist
Texture (less than 2-mm fraction)--loam, silt loam
Clay content--12 to 18 percent
Sand content--30 to 41 percent
Gravel content--3 to 10 percent
Reaction--pH 6.4 to 6.8
Thickness--5 to 80 cm

AB horizon (where present)
Value--2 to 4 moist
Chroma--2 to 4 moist
Clay content--16 to 22 percent
Sand content--20 to 30 percent
Total rock fragment content--10 to 25 percent
Gravel content--10 to 25 percent
Cobble content--0 to 10 percent
Reaction--pH 6.4 to 6.8
Thickness--0 to 34 cm

Bw horizon
Value--3 to 6 dry, 3 or 4 moist
Chroma--2 to 4 dry, 2 to 4 moist
Clay content--15 to 22 percent
Sand content--20 to 46 percent
Texture (less than 2-mm fraction)--loam, silt loam
Total rock fragment content--50 to 80 percent
Gravel content--50 to 70 percent
Cobble content--0 to 10 percent
Reaction--pH 6.2 to 6.5

COMPETING SERIES:
Baconcamp--moderately deep to a lithic contact
Badgerton, Badhap, Boydhollow, Busterback, Hapgood, Harcany, Lionhead, Povey, Snacreek, Snopoc--xeric soil moisture regime
Behanco, Poleline, Tonigut--deep to lithic contact
Behanin--clay films in Bw horizon; silt loam in particle-size control section
Belsac--moderately deep to paralithic contact
Boatman--more than 40 percent sand in particle-size control section (weighted average)
Bullrey, Hobacker, Lolon, Marcetta, Mundos--ustic soil moisture regime
Croesus, Goodski, Nagitsy, Namela, Splitbutte--moderately deep to lithic contact
Dressel--albic horizon
Gateview--no cambic horizon
Nazaton--45 to 100 frost-free days; no silt loam in A horizon; massive Bw2 and C horizons
Papaspila--no cambic horizon
Parkcity, Sweethollow--less than 18 percent clay in particle-size control section

GEOGRAPHIC SETTING:
Elevation--1700 to 2870 m
Mean annual precipitation--550 to 1250 mm
Mean annual air temperature--0.6 to 5.6 degrees C
Frost-free period--20 to 60 days

GEOGRAPHICALLY ASSOCIATED SOILS: None listed

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--5 to 15 um/sec

USE AND VEGETATION:
Major uses--wood products, livestock grazing, wildlife habitat
Potential natural vegetation--Douglas-fir, pinegrass, Rocky Mountain maple, mountain snowberry, heartleaf arnica

DISTRIBUTION AND EXTENT: Small extent in southeastern Idaho; MLRAs 13, 43B, and 47

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

SERIES ESTABLISHED: Clark County, Idaho; 2018

REMARKS:
Diagnostic horizons and other features in this pedon
Mollic epipedon--zone from 5 to 79 cm
Cambic horizon--zone from 79 to 150 cm
Particle-size control section--zone from 30 to 105 cm

Taxonomic version--Twelfth Edition, 2014

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National Cooperative Soil Survey
U.S.A.