LOCATION FELTONIA IDEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, frigid Calcic Pachic Haploxerolls
TYPICAL PEDON: Feltonia loam on a fan remnant with 1 percent slope at an elevation of 1838 meters. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 15 cm; grayish brown (2.5Y 5/2) loam, very dark grayish brown (10YR 3/2) moist; weak very fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and few fine roots; common very fine pores; slightly alkaline (pH 7.7); abrupt smooth boundary.
A--15 to 30 cm; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; weak very coarse prismatic structure parting to weak very fine granular; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots; common very fine tubular pores; few krotovinas filled with slightly effervescent material; slightly alkaline (pH 7.8); clear smooth boundary. (Combined thickness of the A horizons is 20 to 58 cm)
Bt1--30 to 51 cm; dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR 3/2) moist; weak coarse prismatic structure parting to weak coarse subangular blocky then to weak very fine granular; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots; few fine and many very fine tubular pores; few thin clay films on vertical faces of peds and on surfaces along pores; very few skeletans; slightly alkaline (pH 7.7); clear smooth boundary.
Bt2--51 to 69 cm; brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; weak coarse prismatic structure parting to weak medium subangular blocky ; hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine tubular pores; few thin clay films on vertical faces of peds; noneffervescent; slightly alkaline (pH 7.8); clear smooth boundary. (Combined thickness of the Bt horizons is 0 to 55 cm)
Bk1--69 to 91 cm; light gray (10YR 7/2) loam, light olive brown (2.5Y 5/3) moist; massive; hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; common fine calcium carbonate threads; strongly effervescent (19 percent calcium carbonate); moderately alkaline (pH 8.0); abrupt smooth boundary.
Bk2--91 to 124 cm; light gray (10YR 7/2) very gravelly loam, light olive brown (2.5Y 5/3) moist; massive; hard, friable, slightly sticky and slightly plastic; few fine roots; common very fine tubular pores; common fine calcium carbonate threads; 40 percent gravel; strongly effervescent (35 percent calcium carbonate); moderately alkaline (pH 8.0); abrupt smooth boundary. (Combined thickness of the Bk horizons is 25 to 96 cm)
2Bk3--124 to 152 cm; very gravelly loamy sand; single grain; loose; calcium carbonate coats on bottoms of rock fragments; 45 percent gravel; slightly effervescent (12 percent calcium carbonate); moderately alkaline (pH 8.1).
TYPE LOCATION: Teton County, Idaho; about 3.4 kilometers southwest of Tetonia; 788 meters east and 292 meters north from southwest corner of section 5, T.5N., R.45E.; Tetonia USGS topographic quadrangle; lat. 43 degrees, 47 minutes, 1.9 seconds N. and long. 111 degrees, 10 minutes, 17.1 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 50 to 75 cmControl section total clay range: 8 to 27 percent; noncarbonated clay averages 8 to 18 percent
Carbonate clay: 5 to 18 percent in the calcic horizon
Control section rock fragments: 0 to 45 percent (weighted average is less than 35 percent)
Depth to calcic horizon: 50 to 97 cm
Calcium carbonate equivalent: 0 to 35 percent in the particle size control section
Depth to sandy-skeletal material (2Bk3 horizon): 100 to 152 cm
Mean annual soil temperature: 6 to 8 degrees C.
Mean summer soil temperature: 15 to 18.9 degrees C. (frigid soil temperature regime)
Ap or A horizons
Hue: 10YR or 7.5YR moist, 2.5Y or 10YR dry
Value: 2 or 3 moist, 4 or 5 dry
Chroma: 2 or 3 moist
Rock fragments: 0 to 5 percent gravel
Bt horizons
Hue: 7.5YR or 10YR moist
Value: 2 or 3 moist, 4 to 6 dry
Chroma: 2 or 3 moist, 2 or 3 dry
Rock fragments: 0 to 5 percent gravel
Reaction: slightly or moderately alkaline
Bk horizons
Hue: 2.5Y or 10YR moist
Value: 3 to 6 moist
Chroma: 3 or 4 moist, 2 or 3 dry
Fine-earth texture: L or SL with 0 to 45 percent gravel and more than 15 percent coarser than very fine sand
Effervescence: strong to violent
Calcium carbonate equivalent: 15 to 35 percent
2Bk horizon
Hue: 10YR or 7.5YR
Value: 3 to 6 moist
Chroma: 3 or 4 moist
Fine-earth texture: LS or S with 45 to 85 percent gravel
Effervescence: slight to violent
Calcium carbonate equivalent: 5 to 35 percent
Reaction: moderately or strongly alkaline
COMPETING SERIES: These are the Jipper, Stipe, and Richvale series. Jipper soils are deep to lithic contact. Stipe soils are moderately deep to lithic contact. Richvale soils have sandy-skeletal materials at depths greater than 152 cm.
GEOGRAPHIC SETTING:
Landscape: alluvial and outwash plains
Landform: fan remnants and stream terraces
Elevation: 1814 to 1890 meters
Slope: 0 to 4 percent
Parent material: mixed alluvium with loess influence
Mean annual air temperature: 3.3 to 6.7 degrees C
Mean annual precipitation: 305 to 457 mm
Frost free period: 40 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the St. Anthony, Felt, Arimo and Redfish series. St. Anthony, Felt and Arimo are on the same landform. St. Anthony soils are in swales and have a loamy-skeletal particle size class. Felt soils are on convex areas and steep slopes and are Calcixerolls. Arimo soils are on lower positions and have a coarse-loamy over sandy or sandy-skeletal particle size class. Redfish soils are on floodplains of streams and have an aquic moisture regime.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well drained
Runoff: low
Saturated hydraulic conductivity: moderately high in the upper part and very high in the lower part
USE AND VEGETATION:
Major uses: dryland wheat or barley, irrigated wheat, barley, alfalfa, and pasture. Dominant native vegetation: bluebunch wheatgrass, Nevada bluegrass, junegrass, needleandthread grass, mountain big sagebrush, three-tip sagebrush, and some rabbitbrush.
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, 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 69 cm
Calcic horizon: from a depth of 69 to 124 cm
Particle size control section: from a depth of 25 to 100 cm
Soil temperature regime: frigid
Soil moisture regime: xeric
ADDITIONAL DATA:
Typical pedon was not sampled.
Additional reference samples are PEDON ID:
S06ID-081-004