LOCATION PETZEL                  ID

Established Series
Rev. CBR/TDT
04/2011

PETZEL SERIES

The Petzel series consists of very deep, well drained soils formed in outwash with loess influence. Petzel soils are on fan remnants and have slopes of 0 to 8 percent. The mean annual precipitation is about 530 mm and the mean annual air temperature is about 3.9 degrees C.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Calcic Pachic Argixerolls

TYPICAL PEDON: Petzel silt loam on a fan remnant with 7 percent slope at an elevation of 1920 meters. (Colors are for dry soil unless otherwise noted.)

A1 --- 0 to 15 cm; very dark grayish brown (10YR 3/2) silt loam; black (10YR 2/1) moist; strong medium granular structure; slightly hard, very friable, nonsticky, nonplastic; many very fine and common fine roots; common very fine irregular pores; 5 percent granitic gravel; moderately acid (pH 5.8); clear wavy boundary.

A2 --- 15 to 56 cm; very dark grayish brown (10YR 3/2) silt loam; black (10YR 2/1) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, nonplastic; common very fine and few fine and roots; common very fine irregular and common very fine tubular pores; 5 percent granite gravel; neutral (pH 7.0); abrupt wavy boundary. (Combined thickness of the A horizons is 20 to 56 cm)

Bt --- 56 to 75 cm; dark yellowish brown (10YR 4/4) silt loam; dark yellowish brown (10YR 4/4) moist; weak medium prismatic structure parting to moderate medium subangular blocky; moderately hard, friable, slightly sticky, slightly plastic; few very fine roots; many very fine irregular and common very fine tubular pores; distinct clay films on all faces of peds; 10 percent granitic gravel; slightly alkaline (pH 7.4); abrupt irregular boundary. (19 to 45 cm thick)

2Bk --- 75 to 120 cm; very pale brown (10YR 8/2) gravelly loam; pale brown (10YR 6/3) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; few very fine roots; many very fine tubular pores; 60 percent carbonate coats on rock fragments; 40 percent masses of calcium carbonate in matrix; 20 percent granitic gravel; 43 percent calcium carbonate equivalent; 2 percent krotovinas; strongly effervescent; slightly alkaline (pH 7.8); gradual wavy boundary. (45 to 65 cm thick)

2Btk --- 120 to 152 cm; 60 percent yellowish brown (10YR 5/4) and 40 percent white (10YR 8/1) gravelly loam; 60 percent dark yellowish brown (10YR 4/4) moist and 40 percent pale brown (10YR 6/3) moist; moderate coarse subangular blocky structure parting to weak thick platy; moderately hard, friable, slightly sticky, slightly plastic; few very fine roots; many very fine irregular and common very fine tubular pores; prominent clay films on all faces of peds; 20 percent granitic gravel and 5 percent granitic cobbles; 48 percent calcium carbonate equivalent; slightly effervescent; slightly alkaline (pH 7.6).

TYPE LOCATION: Teton County, Idaho; about 6.4 km northeast of Tetonia; 734 meters west and 537 meters north of the southeast corner of section 11, T. 6 N, R. 45 E; Clawson USGS topographic quadrangle; lat. 43 degrees, 51 minutes, 29.9 seconds N. and long. 111 degrees, 6 minutes, 33.8 seconds W., NAD 83.

RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 50 to 71 cm
Particle size control section (weighted average): 20 to 30 percent total clay and 15 to 30 percent calcium carbonate
Depth to argillic horizon: 28 to 56 cm
Depth to calcic horizon: 67 to 82 cm
Depth to discontinuity: 67 to 82 cm
Mean annual soil temperature: 5 to 6.7 degrees C.
Mean summer soil temperature: 15 to 18.3 degrees C. (frigid soil temperature regime)

A horizons
Chroma: 1 or 2 moist
Rock fragments: 5 to 10 percent gravel
Organic matter: 2 to 4 percent
Clay content: 14 to 20 percent

Bt horizon
Value: 2 or 3 moist
Chroma: 2 to 4 moist
Texture: SIL or SICL with 5 to 10 percent gravel
Organic matter: 0.5 to 2.0 percent
Clay content: 18 to 32 percent

2Bk horizon
Value: 6 to 8 moist
Texture: SL, L, or CL with 20 to 60 percent total fragments; 20 to 50 percent gravel; 0 to 40 cobbles; 0 to 10 stones
Clay content; 18 to 30 percent
Calcium carbonate content: 15 to 50 percent

2Btk absent in some pedons

COMPETING SERIES:
These are the Akbash, Burchert, Clegg, Despain, Gross, Jensen, and Lize series. Akbash soils are deep to bedrock. Burchert and Gross soils are moderately deep to bedrock. Clegg soils have no discontinuity and have 0 to 25 percent fragments in the calcic horizon. Despain and Lize soils have 20 to 35 percent fragments in the argillic horizon. Jensen soils have a mean annual soil temperature greater than 6.7 degrees C.

GEOGRAPHIC SETTING:
Landscape: outwash plain
Landform: fan remnant
Elevation: 1882 to 1981 meters
Slope: 0 to 8 percent
Parent material: strongly weathered outwash from the Bull Lake glaciation with loess influence
Mean annual air temperature: 3.3 to 5.6 degrees C.
Mean annual precipitation: 457 to 660 mm
Frost free period: 40 to 70 days

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Bailey (T) and Snyderville series. Bailey soils are in shoulder positions and have a loamy-skeletal particle size class. Snyderville soils are in adjacent positions with less loess influence and on hillslopes and have a loamy-skeletal particle size class.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well
Runoff: medium
Saturated hydraulic conductivity: moderately high in the upper part, moderately low in the particle site control section, and moderately high below the discontinuity

USE AND VEGETATION:
Major uses: pasture and range
Dominant native vegetation: mountain big sagebrush, bluebunch wheatgrass, and Idaho fescue

DISTRIBUTION AND EXTENT:
Distribution: Southeastern Idaho, MLRA 13
Extent: the series is not extensive

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Teton County, Idaho, 2011; Teton Area Idaho and Wyoming Soil Survey

REMARKS:
Diagnostic horizons and soil characteristics recognized in this pedon are:
Mollic epipedon: from a depth of 0 to 56 cm
Argillic horizon: from a depth of 56 to 152 cm
Calcic horizon: from a depth of 75 to 152 cm
Particle size control section: from a depth of 56 to 106 cm; weighted average clay content is 22 percent and calcium carbonate content is 27 percent
Soil temperature regime: frigid
Soil moisture regime: xeric

ADDITIONAL DATA:
Typical pedon was not sampled.

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National Cooperative Soil Survey
U.S.A.