LOCATION HEIST UT+NVEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Xeric Haplocambids
TYPICAL PEDON: Heist fine sandy loam - rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 14 inches; yellowish brown (10YR 5/4) fine sandy loam, brown (10YR 4/3) moist; weak medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; many very fine roots; few very fine tubular pores; slightly effervescent; slightly alkaline (pH 7.8); gradual smooth boundary.
Bw--14 to 26 inches; light yellowish brown (10YR 6/4) fine sandy loam, yellowish brown (10YR 5/4) moist; weak fine subangular blocky structure to massive; soft, very friable, nonsticky, nonplastic; common very fine roots; few very fine and fine tubular pores; very slightly effervescent; moderately alkaline (pH 8.4); 4 percent calcium carbonate equivalent; 1 percent gravel; gradual smooth boundary.
C--26 to 60 inches; light yellowish brown (10YR 6/4) fine sandy loam, yellowish brown (10YR 5/4) moist; massive; slightly hard, very friable, nonsticky, nonplastic; few very fine roots; few very fine and fine tubular pores; moderately effervescent; strongly alkaline (pH 8.8); 15 percent calcium carbonate equivalent; 1 percent gravel.
TYPE LOCATION: Millard County, Utah; 400 feet east and 1,300 feet north of the southwest corner of section 30, T18S, R4W.
RANGE IN CHARACTERISTICS:
Soil moisture: Dry 55 to 70 percent of the time when the soil temperature is above 41 degrees F. The soil moisture regime is aridic bordering on xeric.
Mean annual soil temperature: 48 to 52 degrees F.
Particle-size control section (weighted average):
Clay content: 8 to 18 percent.
Rock fragments: 0 to 15 percent.
Texture: Fine sandy loam or sandy loam
A horizon:
Hue: 7.5YR or 10YR.
Value: 5 to 7 dry, 3 to 5 moist, 5 dry and 3 moist occurs only in the upper 4 inches.
Chroma: 2 to 4, dry or moist.
Texture: Fine sandy loam, sandy loam, or loamy sand.
Rock fragments: 0 to 15 percent.
Reaction: Neutral to moderately alkaline.
Effervescence: Slightly effervescent to violently effervescent, some pedons lack effervescence in the upper 1 to 3 inches.
Bw and C horizons:
Hue: 7.5YR or 10YR.
Value: 6 or 7 dry, 4 to 6 moist.
Chroma: 2 to 4, dry or moist.
Texture: Fine sandy loam or sandy loam above 40 inches; some pedons have loamy sand below 40 inches.
Rock fragments: 35 percent below 40 inches, 0 to 60 percent in any subhorizon.
Calcium carbonate equivalent: 1 to 15 percent of the less than 20 mm fraction. Reaction: Slightly alkaline to strongly alkaline.
Secondary carbonates: Present as weak cementation or other visible forms in some part of the horizon.
Consistence: Soft to hard, dry, and very friable or friable moist, slightly plastic or nonplastic wet.
COMPETING SERIES: These are the
Bijorja(NV),
Chedehap(ID),
Clems(ID),
Drewsey(OR),
Haybourne(NV),
Irrigon(OR),
McClenden(ID),
Prosser(WA),
Rebel(NV),
Royal (WA),
Scooteney(WA), Vining(ID), and Wiehl(WA).
Bijorja soils are moderately deep, and have a MAST of 53 to 57 degrees F.
Chedehap soils lack C horizons and have 2Bk horizons of loamy sand, loamy coarse sand, or coarse sand.
Clems soils are noncalcareous to a depth of 45 inches or more.
Drewsey soils lack carbonates to a depth of 20 to 35 inches and lack C horizons.
Haybourne soils do not have sandy textures within a depth of 40 inches, and are not calcareous in a major part of the control section.
Irrigon soils have 160 to 200 frost free days.
McClenden soils lack C horizons and have carbonates at a depth of 10 to 24 inches.
Prosser soils have bedrock at a depth of 20 to 40 inches.
Rebel soils contain mica flakes in the control section and usually lack effervescence in the upper 15 inches.
Royal soils have Bk horizons.
Scooteney soils average 20 to 35 percent rock fragments in the control section.
Vining soils have bedrock at a depth of 20 to 40 inches.
Wiehl soils have a paralithic contact at a depth of 20 to 40 inches.
GEOGRAPHIC SETTING: Heist soils are on alluvial fans, lake plains, lake terraces, fan terraces, fan skirts, inset fans, beach plains, and bars. Slopes range from 0 to 15 percent. Elevation ranges 4,500 to 7,050 feet. These soils formed in alluvium from mixed rocks. The climate is semi-arid with dry summers. The average annual precipitation ranges 8 to 12 inches. Mean annual temperature ranges 46 to 51 degrees F., and the frost-free period is 100 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Antelope Springs, Escalante, Geer, Patter, Sierocliff, and Uvada soils. Antelope Springs and Uvada soils have a natric horizon. Escalante soils have a calcic horizon. Geer soils are dry more than 75 percent of the time. Patter soils have a cambic horizon and have durinodes. Sierocliff soils have a petrocalcic horizon.
DRAINAGE AND PERMEABILITY: Well drained; very slow to medium runoff; moderately rapid permeability.
USE AND VEGETATION: These soils are used mainly for livestock grazing and wildlife habitat. Some areas are irrigated cropland. Native vegetation is dominantly rabbitbrush, big sagebrush, winterfat, Indian ricegrass, fourwing saltbush, galleta and scattered Utah Juniper.
DISTRIBUTION AND EXTENT: Southwestern and central Utah and southeastern Nevada. These soils are moderately extensive. MLRA 28A and 28B.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Iron County, (Beryl-Enterprise Area), Utah; 1942.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: The zone from 0 to 14 inches. (A horizons).
Cambic horizon: The zone from 14 to 26 inches. (Bw horizons).
Particle-size control section: The zone from 10 to 40 inches (The lower part of the A and Bw, and upper part of the C horizons).
In July 1995 the type location was moved from Iron County to Millard County. The location in Iron County was correlated to a map unit without a Heist component.