LOCATION ZOHNER ID+WY
Established Series
Rev. TWP/CBR/FCF
08/2012
ZOHNER SERIES
The Zohner series consists of very deep, poorly drained soils that formed in mixed alluvium. Zohner soils are on flats and terraces on valley floors and the lower parts of fan remnants. Slopes are 0 to 2 percent. The mean annual precipitation is about 406 millimeters and the mean annual air temperature is about 5 degrees C.
TAXONOMIC CLASS: Fine-loamy, carbonatic Calcic Cryaquolls
TYPICAL PEDON: Zohner silt loam on 0 percent slope on a flat at an elevation of 1844 meters. (Colors are for moist soil unless otherwise noted.)
A--0 to 5 cm; black (10YR 2/1) and very dark grayish brown (10YR 3/2) silt loam, dark gray (10YR 4/1) and gray (10YR 5/1) dry; strong very fine granular structure; very friable, slightly sticky and slightly plastic; common fine distinct brown (10YR 4/3) iron masses; strongly effervescent; slightly alkaline (pH 7.5); abrupt wavy boundary. (5 to 13 cm thick)
Ak--5 to 25 cm; dark gray (2.5Y 4/1) silty clay loam, gray (2.5Y 6/1) dry; weak thin platy structure parting to weak or moderate very fine granular; slightly hard, firm, slightly sticky and slightly plastic; many very fine roots; common very fine pores; few fine distinct dark yellowish brown (10YR 4/4) iron masses, light yellowish brown (10YR 6/4) dry; strongly effervescent; moderately alkaline (pH 8.0); clear smooth boundary. (13 to 33 cm thick)
Bkg1--25 to 33 cm; gray (5Y 6/1) silty clay loam, white (2.5Y 8/1) dry; weak thin platy structure parting to weak very fine granular; very hard, firm, slightly sticky and moderately plastic; many fine roots; few very fine pores and medium root channels; many fine prominent dark yellowish brown (10YR 4/4) iron masses on surfaces of root channels, light yellowish brown (10YR 6/4) dry; strongly effervescent; moderately alkaline (pH 8.1); clear irregular boundary. (8 to 33 cm thick)
Bkg2--33 to 46 cm; dark gray (N 4/) silty clay loam, light gray (2.5Y 7/1) dry; weak very fine angular blocky structure parting to weak fine granular; very hard, firm, moderately sticky and moderately plastic; many fine roots; few very fine pores; few fine faint dark olive gray (5Y 3/2) moist iron masses, olive gray (5Y 4/2) dry; strongly effervescent; slightly alkaline (pH 7.7); abrupt wavy boundary. (0 to 15 cm thick)
Bkg3--46 to 69 cm; gray (N 5/) clay loam, light gray (2.5Y 7/1) dry; massive; very hard, firm, moderately sticky and moderately plastic; common fine roots; few medium and coarse strongly cemented calcium carbonate concretions; many medium distinct and prominent light yellowish brown (2.5Y 6/4) and olive yellow (2.5Y 6/6) dry iron masses; few gravels in lower part; slightly effervescent; moderately alkaline (pH 7.9); clear wavy boundary. (15 to 51 cm thick)
2Bkg4--69 to 100 cm; dark gray (5Y 4/1) gravelly coarse sandy loam, gray (5Y 6/1) dry; massive; very hard, friable, moderately sticky and moderately plastic; common fine roots; many large faint light olive gray (5Y 6/2) dry iron masses and common medium distinct light yellowish brown (2.5Y 6/3) dry iron masses; 20 percent gravel: slightly effervescent; moderately alkaline (pH 7.9); clear smooth boundary. (0 to 64 cm thick)
3Bg--100 to 114 cm; dark gray (2.5Y 4/1) very gravelly loamy coarse sand, light gray (2.5Y 7/1) dry; single grain; loose; nonsticky and nonplastic; few fine roots; very slightly effervescent; 40 percent gravel uncoated; slightly alkaline (pH 7.8); gradual wavy boundary. (0 to 51 cm thick)
3Cg--114 to 152 cm; dark grayish brown (2.5Y 4/2) extremely gravelly sand, light brownish gray (2.5Y 6/2); single grain; loose; nonsticky and nonplastic; 65 percent gravel; very slightly effervescent; slightly alkaline (pH 7.8)
TYPE LOCATION: Teton County, Idaho; about 2 kilometers west of Driggs; 436 meters east and 232 meters south of the northwest corner of section 34, T. 5 N., R. 45 E; Bates USGS topographic quadrangle; lat. 43 degrees, 43 minutes, 16 seconds N. and long. 111 degrees, 8 minutes, 7.6 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 18 to 46 cm
Depth to calcic: 5 to 13 cm
Depth to redoximorphic features (iron concentrations/depletions): 0 to 27 cm
Control section total clay: 20 to 40 percent
Control section carbonate clay: 2 to15 percent
Control section noncarbonate clay: 18 to 25 percent
Depth to sandy-skeletal material (3Bg or 3Cg horizon): 100 to 152 cm
Rock fragments: Where fragments are present, there are 15 to 30 percent gravel in the
particle size control section and 15 to 70 percent below the particle size control
section.
Soil reaction: Slightly alkaline to moderately alkaline
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 horizon
Hue: 7.5YR to 2.5Y moist
Value: 2 to 5 moist
Chroma: 1 to 3 moist Texture: SIL or MKPT
Redoximorphic features (when they occur): Hue 7.5YR or 10YR, value 3 or 4, chroma 2 to 6 moist
Ak horizon
Hue: 10YR or 2.5Y moist
Value: 3 or 4 moist
Chroma: 1 or 2 moist
Texture: SICL or SIL
Redoximorphic features (when they occur): chroma 3 or 4 moist
Calcium carbonate equivalent: 10 to 40 percent; finely divided carbonate acts as a white pigment to mask the colors of the organic matter.
Bkg horizon
Hue: 10YR to 5Y, N moist
Value: 2 to 7 moist, 7 or 8 dry
Chroma: 0 to 2 moist
Texture: SICL, CL, SIL with 0 to 15 percent gravel
Redoximorphic features (when they occur): Hue 10YR or 2.5Y moist, value 4 to 6 moist chroma 1 to 8 moist
Calcium carbonate equivalent: 40 to 80 percent
2Bkg horizon (when present)
Hue: 10YR to 5Y, N moist, 2.5Y or 5Y dry
Value: 2 to 7 moist, 6 or 7 dry
Chroma: 0 to 2 moist
Texture: SIL, SL, COSL, SICL with 15 to 35 percent gravel
Calcium carbonate equivalent: 20 to 70 percent
3Bg or 3Cg horizon
Hue: 10YR or 2.5Y moist
Chroma: 1 to 4 moist
Texture: GRV-LCOS, GRX-S
Calcium carbonate equivalent: 5 to 25 percent
COMPETING SERIES: There are no soil series in the family.
GEOGRAPHIC SETTING:
Landscape: Outwash and alluvial plains
Landform: Flats and terraces on valley floors and the lower parts of fan remnants
Elevation: 1804 to 1859 meters
Slope: 0 to 2 percent
Parent material: Mixed alluvium
Mean annual precipitation: 305 to 457 mm
Mean annual air temperature: 3.3 to 6.7 degrees C
Frost free period: 20 to 50 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Cedron
Furniss,
Boquet,
Tepete
Zundell,
Foxcreek, and
Zufelt soils. Furniss, Boquet, and Tepete soils are found on adjacent swales and drainageways. Furniss and Boquet soils have mixed mineralogy, lack calcic horizons, and have colors in the mollic epipedon darker than value of 5 dry and 3 moist. Tepete soils are histosols. Zundell soils are located on adjacent mounds and have a xeric soil moisture regime. Foxcreek and Zufelt soils are on nearby flats on the valley floor and have a contrasting particle size class and mixed mineralogy. Cedron soils are fine-silty.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: Poorly drained
Runoff: Low
Saturated hydraulic conductivity: Moderately low over very high
Flooding frequency and duration: Occasional to frequent flooding for long periods in May to July
USE AND VEGETATION:
Major uses: Wet meadow pasture
Range/ecological site: R013XY039ID
Dominant native vegetation: Shrubby cinquefoil, slender wheat grass, baltic rush (and
other rushes), sedges, redtop, and scattered willows
DISTRIBUTION AND EXTENT:
Distribution: Eastern Idaho, MLRA 13
Extent: These soils are not extensive
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Teton County, Idaho, 1975; Teton Area, Idaho-Wyoming
Soil Survey
REMARKS: Diagnostic horizons and soil characteristics recognized in this pedon are:
Mollic epipedon: From a depth of 0 to 25 cm; this pedon meets mollic criteria by having a fine-earth fraction that has a calcium carbonate equivalent of 40 percent or more and a color value, moist, of 5 or less. Some other 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 5 to 100 cm
Calcium carbonate equivalent: Greater than 40 percent in the particle size control section
Redoximorphic features (iron concentrations/depletions): Beginning at a depth of 0 to 100 cm
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: S57ID-081-013.
Additional reference samples are PEDON ID:
S57ID-081-014
S04ID-081-002
National Cooperative Soil Survey
U.S.A.