LOCATION INDART WYEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive Typic Haplocryalfs
TYPICAL PEDON: Indart fine sandy loam - woodland (Colors are for dry soil unless otherwise noted.)
0i--0 to 3 inches; Undecomposed organic material, mainly needles, twigs, bark, and pine cones.
0e--3 to 4 inches; partially decomposed organic material like that of the horizon above.
A--4 to 7 inches; brown (7.5YR 5/2) fine sandy loam, dark brown (7.5YR 3/2) moist; moderate fine crumb structure; soft, very friable; 5 percent gravel; moderately acid (pH 5.7); diffuse wavy boundary. (O to 4 inches thick)
E--7 to 16 inches; pink (5YR 7/3) fine sandy loam, reddish brown (5YR 5/4) moist; moderate fine platy structure that parts to fine granules; soft, very friable; 5 percent gravel; moderately acid (pH 5.8); diffuse wavy boundary. (6 to 12 inches thick)
E/B--16 to 23 inches; mixed colors including light reddish brown (5YR 6/4) and red (2.5YR 5/6) light sandy clay loam, reddish brown (5YR 5/4) and red (2.5YR 4/6) moist; weak medium subangular blocky structure; slightly hard, very friable; few thin glossy patches on the clayey faces of peds; 5 percent gravel; this horizon consists of clayey material like that of the underlying horizon embedded in a light colored matrix like that of the overlying horizon; moderately acid (pH 5.8); diffuse wavy boundary. (6 to 12 inches thick)
Bt--23 to 36 inches; light reddish brown (2.5YR 6/4) sandy clay loam, reddish brown (2.5YR 5/4) moist; moderate medium subangular blocky structure; hard, very friable; nearly continuous clay films on faces of peds; continuous clay films in root channels; 5 percent gravel; moderately acid (pH 6.0); abrupt wavy boundary. (8 to 22 inches thick)
Cr--36 to 40 inches; soft, noncalcareous, reddish brown sandstone.
TYPE LOCATION: Johnson County, Wyoming; SW1/4 SW1/4 sec. 23, T.45N., R.84W.
RANGE IN CHARACTERISTICS: The soil is noncalcareous and slightly to moderately acid throughout. Thickness of solum ranges from 20 to 40 inches and depth to the paralithic contact ranges from 20 to 40 inches. Organic carbon ranges from .6 to about 2 percent in the surface horizons and decreases uniformly with depth. The soil is 80 to 100 percent base saturated. Rock fragments range from 0 to 15 percent but are typically less than 10 percent. The mean annual soil temperature ranges from 32 degrees to 47 degrees F. and the mean summer soil temperature ranges from 40 degrees to 46 degrees F. with an O horizon at least 4 inches thick and in areas with a good crown cover.
A horizons are absent in some pedons.
The E horizon has hue of 7.5YR through 2.5YR, value of 6 or 7 dry, 5 or 6 moist, and chroma of 2 through 4. It is usually platy, but is granular in some pedons. This horizon is soft to slightly hard.
The Bt horizon has hue of 5YR through 10R, value of 5 or 6 dry, 4 or 5 moist, and chroma of 3 through 6. It is typically sandy clay loam but clay ranges from 18 to 35 percent, silt from 5 to 30 percent, sand from 40 to 75 percent with more than 35 percent fine sand or coarser. Oriented clay films are present in some pedons.
COMPETING SERIES: These are the Castelleia, Ericson, Lick, Limber, Owlcreek, Whitefish, and Woodrock series. Castelleia, Ericson, Graysill, Lick, and Owlcreek, soils are more than 40 inches deep. Graysill, Limber, and Woodrock soils have a lithic contact at depths of less than 40 inches.
GEOGRAPHIC SETTING: The Indart soils are on moderately steep to steeply sloping upland hills, ridges, and mountainsides. At the type location these soils are at elevations in excess of 7,500 feet. They formed in parent sediments weathered from underlying reddish brown sandstones and sandy shales. Slopes usually range from 5 to 40 percent. At the type location the average annual precipitation is 20 inches with peak periods of precipitation in the spring and early summer months. The mean annual temperature is 36 degrees F. and the mean summer temperature is 58 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Amsden and Sanford soils. Amsden soils lack an albic horizon and have a mollic epipedon. Sanford soils have argillic horizons that consist of lamellae.
DRAINAGE AND PERMEABILITY: Well-drained; medium runoff; moderate permeability above the bedrock.
USE AND VEGETATION: These soils are used principally as native pastureland; however, they are also used for forestry and recreational purposes. Principal native vegetation is Douglas-fir and lodgepole pine with an understory of grasses and sedges.
DISTRIBUTION AND EXTENT: Mountainous areas of north-central Wyoming. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Johnson County (Southern Johnson Area), Wyoming, 1971.
OSED scanned by NSSQA. Last revised by state on 2/73.