LOCATION JONDA IDEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Xerollic Haplocryalfs
TYPICAL PEDON: Jonda gravelly loam - rangeland. On a northwest-facing convex slope of 2 percent at 7,100 feet elevation. (Colors are for dry soil unless otherwise noted. This profile was dry when described on October 1, 1980.)
A--0 to 4 inches; grayish brown (10YR 5/2) gravelly loam; very dark grayish brown (10YR 3/2) moist; weak fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine roots; many very fine tubular pores; 1 percent stones, 3 percent cobbles, 30 percent pebbles; neutral (pH 7.2); clear smooth boundary. (3 to 6 inches thick)
Bt1--4 to 16 inches; brownish yellow (10YR 6/6) extremely cobbly clay loam, dark yellowish brown (10YR 4/6) moist; moderate fine subangular blocky structure; slightly hard, very friable, moderately sticky and moderately plastic, many very fine roots; common very fine tubular pores; common faint clay films on faces of peds; 50 percent cobbles, 25 percent pebbles, 1 percent stones; slightly alkaline (pH 7.4); clear wavy boundary. (2 to 12 inches thick)
Bt2--16 to 21 inches; yellow (10YR 7/6) extremely cobbly clay loam; brownish yellow (10YR 6/6) moist; moderate fine subangular blocky structure; slightly hard, very friable, slightly sticky and moderately plastic; common very fine roots; common very fine tubular pores; few faint clay films on rock surfaces and faces of peds; 50 percent cobbles, 30 percent pebbles, 1 percent stones; slightly alkaline (pH 7.7); clear wavy boundary. (4 to 5 inches thick)
Bk1--21 to 40 inches; yellowish brown (10YR 5/6) extremely cobbly sandy loam; yellowish brown (10YR 5/8) moist; weak medium and coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots; 50 percent cobbles, 30 percent pebbles, 1 percent stones; slightly effervescent; moderately alkaline (pH 8.4); clear irregular boundary. (3 to 19 inches thick)
Bk2--40 to 60 inches; very pale brown (10YR 8/4) extremely cobbly sandy loam; light yellowish brown (10YR 6/4) moist; weak fine subangular blocky structure; slightly hard, very friable, nonsticky and slightly plastic; few very fine roots; 50 percent cobbles, 30 percent pebbles, 1 percent stones; slightly effervescent; moderately alkaline (pH 8.2).
TYPE LOCATION: Butte County, Idaho; about 2/3 of a mile north of the Reliance Mine; approximately 2,800 feet west and 1,300 feet south of the northeast corner, sec. 10, T. 3 N., R 24 E.
RANGE IN CHARACTERISTICS:
Xeric soil moisture regime
Depth to carbonates - 10 to 21 inches
Average annual soil temperature - 41 to 44 degrees F Average summer soil temperature - 52 to 59 degrees F
A horizon
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Bt horizon
Hue - 10YR or 7.5YR
Color value, dry - 6 or 7
Value, moist - 3 to 6
Chroma - 2 to 6
Rock fragments - 50 to 85 percent
Texture - very cobbly clay loam, extremely gravelly clay loam, very gravelly clay loam, or extremely cobbly clay loam
Clay content - 27 to 35 percent
Bk horizon
Hue - 10YR or 7.5YR
Color value, dry - 5 to 8
Value, moist - 5 to 6
Chroma - 4 to 8
Rock fragments - 60 to 90 percent
Texture - extremely gravelly loam, extremely cobbly sandy loam, extremely gravelly sandy loam, or extremely cobbly loam
Reaction - slightly or moderately alkaline
COMPETING SERIES: These are the Buffmeyer, Condie, Guiser, Judkins, Mulgon, Namon, Rocko, Scandard, Tamred, Timberlin and Wapshilla series. All of these soils lack carbonates. Also, Judkins, Namon, Scandard, Tamred and Timberlin soils have a lithic contact at a depth of 20 and 40 inches.
GEOGRAPHIC SETTING: Jonda soils formed in mixed slope alluvium and colluvium on northwest-facing convex mountain and foothill slopes. Slopes range from 5 to 45 percent. The average annual precipitation is from 12 to 16 inches. Elevation ranges from 6,000 to 7,500 feet. The climate is subhumid with cold moist winters and cool summers. The average temperature is 39 to 42 degrees F. The frost-free season is 50 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brabas, Challis, Frailton, Gelkie, Klug, and Zeebar soils. Brabas soils have more than 35 percent clay in the argillic horizon. Challis and Frailton soils lack an argillic horizon and have a warmer average summer soil temperature. Gelkie, Klug, and Zeebar soils have a mollic epipedon.
DRAINAGE AND PERMEABILITY: Well drained; moderately slow permeability; slow to very rapid runoff.
USE AND VEGETATION: Jonda soils are primarily used for livestock grazing. Vegetation is Wyoming big sagebrush, low and black sagebrush, bluebunch wheatgrass, and Sandberg bluegrass.
DISTRIBUTION AND EXTENT: Central and southeast Idaho. This series is small in extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Butte County Area, Idaho, 1997.
REMARKS: Diagnostic horizons and other features:
Ochric epipedon
Argillic horizon - from 4 to 21 inches
Mollic intergrade - the upper 6 inches when mixed has moist value of 3