LOCATION KUCERA ID+WYEstablished Series
TAXONOMIC CLASS: Coarse-silty, mixed, superactive, frigid Calcic Pachic Haploxerolls
TYPICAL PEDON: Kucera silt loam, cropland; on a 17 percent slope at 1,674 meters elevation. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 15 cm; brown (10YR 5/3) silt loam, very dark grayish brown (10YR 3/2) moist; moderate thick platy structure parting to moderate coarse and medium subangular blocky; soft, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine irregular and few fine tubular pores; slightly alkaline (pH 7.6); abrupt smooth boundary.
A--15 to 41 cm; brown (10YR 5/3) silt loam, very dark grayish brown (10YR 3/2) moist; weak coarse subangular blocky structure parting to moderate medium and fine subangular blocky; soft, friable, slightly sticky and slightly plastic; common very fine and few fine roots; common very fine and few fine tubular pores; slightly alkaline (pH 7.7); clear smooth boundary. (The combined thickness of the A horizons is 20 to 72 cm.)
AB--41 to 66 cm; brown (10YR 5/3) silt loam, dark brown (10YR 3/3) moist; moderate coarse and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; few very fine and fine tubular pores; about 5 percent very hard (cicada) nodules; slightly alkaline (pH 7.7); clear smooth boundary. (0 to 40 cm thick)
Bw--66 to 86 cm; pale brown (10YR 6/3) silt loam, dark grayish brown (10YR 4/2) moist; moderate coarse and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; few very fine and fine tubular pores; about 5 percent very hard (cicada) nodules; slightly alkaline (pH 7.8); abrupt wavy boundary. (0 to 36 cm thick)
Bk1--86 to 112 cm; pale brown (10YR 6/3) silt loam, brown (10YR 5/3) moist; weak medium and fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots; few very fine and fine tubular pores; finely disseminated calcium carbonate, few fine irregularly shaped soft masses and threads of calcium carbonate; strongly effervescent (18 percent calcium carbonate equivalent); moderately alkaline (pH 8.1); gradual wavy boundary. (10 to 51 cm thick)
Bk2--112 to 152 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 5/3) moist; massive; soft, very friable, nonsticky and slightly plastic; few very fine roots; few very fine and fine tubular pores; finely disseminated calcium carbonate, common fine and medium irregularly shaped soft masses and threads of calcium carbonate; strongly effervescent (25 percent calcium carbonate equivalent); moderately alkaline (pH 8.0).
TYPE LOCATION: Caribou County, Idaho; about 5.6 kilometers northwest of Chesterfield; about 820 meters east and 924 meters north of the southwest corner of section 13, T. 6 S., R. 38 E.; USGS Chesterfield Reservoir 7.5 minute topographic quadrangle; latitude 42 degrees 53 minutes 58.5 seconds north, longitude 111 degrees 57 minutes 15.5 seconds west, NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 50 to 109 cm
Depth to calcic horizon: 50 to 109 cm
Calcium carbonate equivalent in calcic horizon: 15 to 35 percent
Mean summer soil temperature: 15 to 18.9 degrees C.
Mean annual soil temperature: 5.0 to 8.0 degrees C. (frigid soil temperature regime)
Particle size control section total clay: 8 to 18 percent with less than 15 percent fine sand and coarser sand plus gravel
A, Ap, or AB horizons
Hue: 7.5YR or 10YR moist
Value: 4 or 5 dry, 2 to 3 moist
Chroma: 2 or 3 dry and moist
Clay content: 10 to 18 percent
Reaction: neutral to slightly alkaline
Bw horizons
Hue: 7.5YR or 10YR moist
Value: 5 or 6 dry, 3 or 4 moist
Chroma: 2 to 4 dry and moist
Clay content: 10 to 18 percent
Reaction: neutral to moderately alkaline
Bk horizons
Value: 6 or 7 dry, 4 to 6 moist
Chroma: 2 to 4 dry and moist
Clay content: 8 to 18 percent
Calcium carbonate clay content: 3 to 5 percent
Rock fragments: 0 to 5 percent gravel
Reaction: slightly to strongly alkaline
Calcium carbonate equivalent: 10 to 35 percent
COMPETING SERIES: There are no soil series in this family.
GEOGRAPHIC SETTING:
Landscape: plateaus, alluvial plains, and outwash plains
Landform: terraces, hills, ridges, basalt plains, and hills
Elevation: 1219 to 2231 meters
Slope: 0 to 50 percent
Parent material: loess and silty alluvium from mixed sources
Mean annual precipitation: 305 to 559 mm
Mean annual air temperature: 2.8 to 7.8 degrees C
Frost-free period: 40 to 110 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Iphil, Lanoak, Lonjon, Ririe, Rexburg and Sprollow series. Iphil soils occur on slightly convex positions on hills, have a 18 to 40 cm thick mollic epipedon, and are calcareous to the soil surface. Lanoak soils occur on hills, ridges, fans remnants and mountain slopes, lack a calcic horizons within 109 cm of the mineral soil surface and are fine-silty. Lonjon soils occur on hills and mountain slopes, are calcareous to the surface and are loamy-skeletal. Ririe soils occur on hills, terraces and mountain slopes and have a 18 to 40 cm thick mollic epipedon. Rexburg soils occur on similar landform positions and have a 30 to 50 cm thick mollic epipedon. Sprollow soils occur on ridges, hill slopes and mountain slopes, are calcareous to the surface and are loamy-skeletal.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well
Runoff: medium
Saturated hydraulic conductivity: moderately high
USE AND VEGETATION:
Major uses: cropland and rangeland; principle crops are irrigated and nonirrigated wheat, barley, alfalfa hay, pasture and irrigated potatoes
Dominant native vegetation: The potential native vegetation is bluebunch wheatgrass, Idaho fescue, mountain big and basin big sagebrush and needlegrass
DISTRIBUTION AND EXTENT:
Distribution: Southeastern Idaho and Western Wyoming, MLRA 13
Extent: these soils are moderately extensive
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Bingham County, Idaho, 1972; Bingham area, Idaho Soil Survey.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: from a depth of 0 to 66 cm
Cambic horizon: from a depth of 66 to 86 cm
Calcic horizon: from a depth of 86 to 152 cm
Particle-size control section: from a depth of 25 to 100 cm
Soil moisture regime: xeric
Soil temperature regime: frigid
The type site was moved to Caribou County, Idaho in 2007.
ADDITIONAL DATA:
Typical pedon was not sampled.