LOCATION CEDRON ID+WYEstablished Series
TAXONOMIC CLASS: Fine-silty, carbonatic Calcic Cryaquolls
TYPICAL PEDON: Cedron silt loam on a level, 0 percent slope in a pasture at an elevation of 1826 meters. (Colors are for moist soil unless otherwise noted. When described on June 3, 2004, the soil was moist throughout.)
A1--0 to 10 cm; black (7.5YR 2.5/1) silt loam, very dark gray (10YR 3/1) dry; moderate fine and medium granular structure; hard, friable, slightly sticky and slightly plastic; many fine and few coarse roots; many very fine and fine irregular pores; finely disseminated calcium carbonate; slightly effervescent; slightly alkaline (pH 7.8); clear smooth boundary.
A2--10 to 20 cm; black (10YR 2/1) clay, dark gray (10YR 4/1) dry; moderate medium subangular blocky structure; extremely hard, friable, very sticky and very plastic; many fine and few coarse roots; common very fine and fine irregular pores; finely disseminated calcium carbonate; very slightly effervescent; slightly alkaline (pH 7.8); clear wavy boundary.
A3--20 to 30 cm; very dark grayish brown (10YR 3/2) clay, dark gray (2.5Y 4/1) dry; moderate fine and medium subangular blocky structure parting to moderate medium granular; extremely hard, friable, very sticky and very plastic; many very fine and fine and many medium roots; many very fine irregular pores; common fine irregular calcium carbonate masses; very slightly effervescent; moderately alkaline (pH 8.0); clear wavy boundary. (The combined thickness of the A horizons is 20 to 46 cm.)
Bkg1--30 to 48 cm; brown (7.5YR 4/2) silty clay loam, light brown (7.5YR 6/3) dry; moderate fine and medium subangular blocky structure parting to moderate medium granular; extremely hard, friable, very sticky and very plastic; many very fine and fine and many medium roots; common very fine tubular and many very fine irregular pores; common fine irregular calcium carbonate threads and common medium irregular calcium carbonate masses; common fine faint brown (7.5YR 4/3) irregular iron masses throughout and common fine faint brown (7.5YR 5/2) irregular iron depletions throughout; slightly effervescent; moderately alkaline (pH 8.2); clear wavy boundary.
Bkg2--48 to 81 cm; light gray (10YR 7/2) silt loam, white (10YR 8/1) dry; moderate medium subangular blocky structure; extremely hard, friable, slightly sticky and very plastic; common fine and many medium roots; common very fine and fine irregular pores; common medium and coarse irregular calcium carbonate nodules and many fine and medium spherical calcium carbonate masses; common fine faint light brown (7.5YR 6/3) irregular iron masses throughout; strongly effervescent (60 percent calcium carbonate); moderately alkaline (pH 8.4); abrupt smooth boundary.
Bkg3--81 to 97 cm; pinkish gray (7.5YR 6/2) silt loam, white (10YR 8/1) dry; weak medium subangular blocky structure; extremely hard, friable, moderately sticky and slightly plastic; many very fine and few fine roots; common very fine and fine irregular pores; common medium and coarse irregular calcium carbonate nodules and many fine spherical calcium carbonate masses; many fine and medium prominent brown (7.5YR 5/3) irregular iron masses throughout and common fine and medium faint light brownish gray (10YR 6/2) irregular iron depletions throughout; slightly effervescent (50 percent calcium carbonate); moderately alkaline (pH 8.4); clear smooth boundary. (The combined thickness of the Bkg1, Bkg2, and Bkg3 horizons 50 to 80 cm)
Bkg4--97 to 112 cm; brown (7.5YR 5/2) loam, light brownish gray (10YR 6/2) dry; weak medium subangular blocky structure; extremely hard, friable, moderately sticky and slightly plastic; many very fine and few fine roots; many very fine irregular pores; common medium and coarse irregular calcium carbonate nodules and common fine and medium spherical calcium carbonate masses; many medium distinct brown (7.5YR 4/4) irregular iron masses throughout and common medium distinct gray (10YR 6/1) irregular iron depletions throughout; slightly effervescent; moderately alkaline (pH 8.0); clear smooth boundary. ( 0 to 25 cm thick)
Bkg5--112 to 127 cm; brown (10YR 5/3) silt loam, light gray (2.5Y 7/2) dry; weak medium subangular blocky structure parting to weak medium granular; very hard, friable, moderately sticky and very plastic; many very fine and few fine roots; many very fine irregular pores; common coarse irregular indurated calcium carbonate nodules and many fine spherical calcium carbonate masses; many medium prominent strong brown (7.5YR 4/6) irregular iron masses throughout and common medium prominent gray (2.5Y 6/1) irregular iron depletions throughout; slightly effervescent; slightly alkaline (pH 7.8); clear smooth boundary. (0 to 25 cm thick)
Bkg6--127 to 152 cm; gray (2.5Y 5/1) silt loam, light gray (2.5Y 7/1) dry; massive structure; hard, friable, moderately sticky and moderately plastic; few fine roots; many very fine irregular pores; common medium irregular calcium carbonate nodules and common medium spherical calcium carbonate masses; many medium prominent strong brown (7.5YR 4/6) irregular iron masses throughout; slightly effervescent; slightly alkaline (pH 7.8).
TYPE LOCATION: Teton County, Idaho; about 7.1 kilometers northwest of Victor; 220 meters north and 457 meters west of the southeast corner of sec. 20, T. 4 N., R. 45 E.; Bates USGS topographic quadrangle; lat. 43 degrees 39 minutes 10 seconds N. and long. 111 degrees 10 minutes 1 second W., NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 20 to 46 cm
Depth to redoximorphic features (iron concentrations/depletions): 15 to 46 cm
Particle-size control section: averages 20 to 50 percent total clay, 18 to 35 percent noncarbonate clay, 2 to 15 percent carbonate clay and 40 to 70 percent calcium carbonate equivalent
Depth to 2Cg horizon (when present): greater than 100 cm
Rock fragments: 0 to 60 percent gravel including indurated nodules, by volume in horizons below the particle size
control section
Soil reaction: Slightly to moderately alkaline
Depth to calcic horizon: 20 to 46 cm
Mean annual soil temperature: 3.9 to 7.2 degrees C.
Mean summer soil temperature: 6.1 to 12.8 degrees C. (cryic soil temperature regime)
A horizons
Hue: 7.5YR to 2.5Y, N moist or dry
Value: 2 or 3 moist, 3 or 4 dry
Chroma: 0 to 2 moist, 1 or 2 dry
Texture: SIL, SICL, C
Effervescence: non-effervescent to slightly effervescent
Calcium carbonate equivalent: 0 to 35 percent in the A1 and 0 to 70 percent in all other A horizons
Bkg horizons
Hue: 7.5YR to 2.5Y moist or dry
Value: 5 to 8 moist, 6 to 8 dry
Chroma: 1 to 3 moist or dry
Texture: SIL or SICL with thin layers of C, SIC, and L
Calcium carbonate equivalent: 40 to 70 percent in the upper part and 10 to 50 percent in the lower part
2Cg horizon (when present)
Hue: 10YR or 2.5Y
Value: 4 or 5 moist or dry
Chroma: 1 to 3 moist or dry
Texture: FSL, SIL, or SL with 15 to 60 percent gravel
Calcium carbonate equivalent: less then 15 percent
COMPETING SERIES: There are no other series in the family.
GEOGRAPHIC SETTING:
Landscape: Outwash and alluvial plains
Landform: Terraces, oxbows, flood plains and swales on the valley floor and lower portions of plains
Elevation: 1826 to 1844 meters
Slope: 0 to 2 percent
Parent material: Silty alluvium
Mean annual precipitation: 305 to 457 millimeters
Mean annual air temperature: 3.3 to 6.7 degrees C
Frost free period: 20 to 50 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Furniss, Boquet, Tepete, Zohner and Zundell soils. Furniss soils do not have carbonatic mineralogy. Tepete is an organic soil. Boquet soils have a histic epipedon. Furniss, Boquet, and Tepete are located in adjacent swales and depressions. Zohner soils are fine-loamy. Zundell soils are somewhat poorly drained and are on adjacent mounds.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: Poorly drained
Runoff: Low
Saturated hydraulic conductivity: Moderately low over moderately high
Flooding frequency and duration: Occasional flooding for long periods in May to July
USE AND VEGETATION:
Major uses: pasture, cultivation (minimal acres primarily in barley production), wildlife habitat
Range/ecological site: R013XY039ID
Dominant native vegetation: Baltic rush, beaked sedge, red top, and willows
DISTRIBUTION AND EXTENT:
Distribution: Eastern Idaho, MLRA 13
Extent: The series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Teton County, Idaho, 1969; Teton Area, Idaho-Wyoming Soil Survey
REMARKS: This revision in 2006 changes the type location of this series.
Diagnostic horizons and features in this pedon include:
Mollic epipedon: from a depth of 0 to 30 cm
Some pedons meet mollic criteria by being 18 to 25 centimeters thick (after mixing the upper 18 cm of mineral soil) and one-third or more of the total thickness between the mineral soil surface and the upper boundary of any identifiable secondary carbonates.
Calcic horizon: from a depth of 30 to 157 cm
Calcium carbonate equivalent, weighted average in particle size control section: about 50 percent
Particle size control section: from a depth of 25 to 100 cm
Soil temperature regime: Cryic
Soil moisture regime: Aquic
ADDITIONAL DATA:
Lab data from NSSL, Lincoln, NE:
This pedon was sampled as PEDON ID S04ID-081-001.