LOCATION BEARHOLLOW IDEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, frigid Typic Calcixerepts
TYPICAL PEDON: Bearhollow gravelly loam, nonirrigated cropland; on an 18 percent slope at 6,520 feet elevation. When described on June 13, 1989 the soil was moist to 6 inches and dry below. (Color is for air dry soil unless otherwise noted.)
Ap--0 to 6 inches; pale brown (10YR 6/3) gravelly loam, dark brown (10YR 3/3) moist; moderate very fine and fine granular structure; soft, very friable, slightly sticky and slightly plastic; common very fine and medium roots; many very fine and few fine irregular pores; strongly effervescent (42 percent calcium carbonate equivalent); 15 percent gravel; moderately alkaline (pH 8.0); abrupt smooth boundary. (4 to 9 inches thick)
Bk1--6 to 11 inches; very pale brown (10YR 7/3) loam, brown (10YR 5/3) moist; moderate medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic, few very fine and medium roots; common very fine and few fine tubular pores; many fine and medium irregularly shaped soft lime filaments, seams and masses; violently effervescent (23 percent calcium carbonate equivalent); 5 percent gravel; moderately alkaline (pH 8.4); clear wavy boundary. (4 to 9 inches thick)
Bk2--11 to 20 inches; very pale brown (10YR 7/4) loam, brown (10YR 5/3) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine and medium roots; many very fine and few fine tubular pores; 20 percent hard nodules; many fine and medium irregularly shaped soft lime filaments, seams and masses; violently effervescent (18 percent calcium carbonate equivalent); 5 percent gravel; moderately alkaline (pH 8.4); clear wavy boundary. (7 to 12 inches thick)
Bk3--20 to 24 inches; very pale brown (10YR 7/3) loam, yellowish brown (10YR 5/4) moist; moderate fine and medium subangular blocky structure; slightly hard friable, slightly sticky and slightly plastic; few very fine and medium roots; many very fine tubular pores; common fine irregularly shaped soft lime filaments and disseminated lime; strongly effervescent (13 percent calcium carbonate equivalent); 5 percent gravel; moderately alkaline (pH 8.4); clear wavy boundary. (0 to 5 inches thick)
BCk--24 to 33 inches; very pale brown (10YR 7/3) fine sandy loam, yellowish brown (10YR 5/4) moist; weak fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine and medium roots; many very fine and few fine and medium tubular pores; few fine irregularly shaped soft lime filaments and seams; violently effervescent (25 percent calcium carbonate equivalent); 5 percent gravel; moderately alkaline (pH 8.4); gradual wavy boundary. (6 to 12 inches thick)
2Ck1--33 to 44 inches; pale yellow (2.5Y 7/4) loamy fine sand, light olive brown (2.5Y 5/4) moist; few fine prominent yellowish brown (10YR 5/6) moist relic mottles; massive; soft, very friable, nonsticky and nonplastic; few very fine and medium roots; many very fine and few fine tubular pores; few fine irregularly shaped soft lime filaments and seams; violently effervescent (25 percent calcium carbonate equivalent); moderately alkaline (pH 8.4); abrupt wavy boundary. (6 to 14 inches thick)
3Ck2--44 to 62 inches; light gray (2.5Y 7/2) silty clay loam, light brownish gray (2.5Y 6/2) moist; common fine prominent yellowish brown (10YR 5/6) moist relic mottles; massive; slightly hard, friable, sticky and plastic; common fine irregularly shaped soft lime seams and disseminated lime; violently effervescent (9 percent calcium carbonate equivalent); strongly alkaline (pH 8.6).
TYPE LOCATION: Bear Lake County, Idaho; about 0.75 miles south of Montpelier Canyon; about 2,200 feet east and 1,550 feet south of the northwest corner of sec. 7, T.13S., R.45E. 42 degrees, 19 minutes, 27 seconds north latitude, 111 degrees, 13 minutes, 6 seconds west longitude.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 40 to 46 degrees F
Absent in some pedons - 3Ck2 horizon
Particle-size control section (average)
Clay content - 8 to 15 percent
Gravel content - 0 to 30 percent
Calcium carbonate equivalent - 15 to 30 percent
Ap horizon
Hue - 10YR through 5Y
Value - 4 through 7 dry, 3 through 6 moist
Chroma - 2 through 4 dry or moist
Bk horizon
Hue 10YR through 5Y
Value - 6 through 8 dry, 5 through 8 moist
Chroma - 2 through 5 dry, 2 through 4 moist
Texture - L, GR-L, SIL or GR-SIL
Reaction - moderately alkaline or strongly alkaline
BCk horizon
Hue 10YR through 5Y
Value - 6 through 8 dry, 5 through 8 moist
Chroma - 2 or 4 dry and moist
Texture - FSL or SL
Reaction - moderately alkaline or strongly alkaline
2Ck1 horizon
Hue 10YR through 5Y
Value - 6 through 8 dry, 5 through 7 moist
Chroma - 2 through 4 dry and moist
Reaction - moderately alkaline or strongly alkaline
3Ck2 horizon
Hue 2.5Y or 5Y
Value - 6 through 8 dry, 5 or 6 moist
Chroma - 2 or 3 dry and moist
Reaction - moderately alkaline or strongly alkaline
COMPETING SERIES: There are no other series listed in this family.
GEOGRAPHIC SETTING: Bearhollow soils are on hills, fan terraces and undulating basalt plains. Slopes range from 1 to 60 percent. Elevations range from 5,200 to 6,600 feet. The soil formed in mixed alluvium with some loess influence. Average annual precipitation is 12 to 16 inches, average annual temperature is 38 to 44 degrees F., the frost free period is 65 to 90 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brifox (T), Iphil and Rexburg soils. Brifox soils have a fine particle-size control section. Iphil and Rexbrug soils have mollic epipedons and a coarse-silty particle-size control section. Brifox soils are on terraces and hills, lower and higher on the landscape than Bearhollow soils. Iphil soils are on similar positions as Bearhollow soils, but are on smooth to convex north and west-facing slopes. Rexburg soils are on loess covered hills and terraces lower on the landscape than Bearhollow soils.
DRAINAGE AND PERMEABILITY: Well drained; slow to very rapid runoff; moderate permeability.
USE AND VEGETATION: Bearhollow soils are used for nonirrigated cropland. Typical crops consist of small grains and alfalfa.
DISTRIBUTION AND EXTENT: Southeastern Idaho. The soils of this series are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Franklin County Area, Idaho; 1997.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon
Calcic horizon - The zone from 6 to 33 inches
Particle-size control section - The zone from 10 inches to 40 inches