LOCATION JARDAL UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, carbonatic, mesic Petrocalcic Palexerolls
TYPICAL PEDON: Jardal gravelly very fine sandy loam - rangeland (Colors are for moist soil unless otherwise stated)
A--0 to 4 inches; very dark grayish brown (10YR 3/2) gravelly very fine sandy loam; grayish brown (10YR 5/2) dry; weak coarse platy structure parting to moderate very fine granular; soft, very friable, non sticky, non plastic; many very fine, fine and medium roots; many very fine interstitial pores; very slightly effervescent; moderately alkaline (pH 8.2); 6 percent calcium carbonate equivalent; 25 percent gravel; clear smooth boundary. (3 to 9 inches thick)
Bw--4 to 9 inches; dark brown (10YR 3/3) very gravelly very fine sandy loam; brown (10YR 5/3) dry; moderate fine granular structure; soft, very friable, non sticky, non plastic; many very fine, fine and medium roots; many very fine interstitial pores; strongly effervescent; strongly alkaline (pH 8.6); 24 percent calcium carbonate equivalent; 35 percent gravel; 5 percent cobbles; clear smooth boundary. (3 to 6 inches thick)
Bk--9 to 26 inches; light gray (10YR 7/2) extremely gravelly very fine sandy loam; white (10YR 8/2) dry; massive; slightly hard, friable, slightly sticky, slightly plastic; many medium and coarse roots; few fine interstitial pores; calcium carbonates occurs in filaments; violently effervescent; strongly alkaline (pH 9.0); 49 percent calcium carbonate equivalent; 70 percent gravel; abrupt wavy boundary. (9 to 15 inches thick)
Bkm--26 to 30 inches; indurated carbonate hardpan that has a trowelled surface and light gray (10YR 7/2) laminae 3 mm to 1 cm thick. Subjacent layers are white (10YR 8/2) dry and are soft; roots are matted on the surface; violently effervescent; strongly alkaline (pH 9.0).
TYPE LOCATION: Millard County, Utah; 3300 feet north of the southeast corner of Section 33, T18S, R4W. 39 degrees, 12 minutes and 57 seconds north latitude, 112 degrees, 13 minutes and 07 seconds west longitude.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 48 to 54 degrees F., and the mean summer soil temperature is 66 to 71 degrees F. The soil moisture regime is Xeric bordering on Aridic.
Rock fragments on the surface range from 25 to 75 percent and consists of gravel, cobbles, and stones. Depth to the calcic horizon is 9 to 15 inches. Depth to the petrocalcic horizon is 20 to 40 inches. The particle size control section averages 10 to 18 percent clay with individual subhorizons ranging from 5 to 18 percent clay. Rock fragment content ranges averages 35 to 70 percent in the particle size control section with some individual subhorizons ranging from 70 to 90 percent.
The A horizon has a hue of 10YR, value of 4 or 5 dry, 2 or 3 moist, chroma of 2 or 3. Texture is a gravelly very fine sandy loam or very gravelly very fine sandy loam. Content of gravel is 15 to 50 percent and the content of the cobbles is 0 to 15 percent. Effervescence is very slight to slight and the reaction is moderately alkaline. Calcium carbonate equivalent is 5 to 15 percent.
The Bw horizon has a hue of 10YR, value 3 or 4 moist, chroma of 3 or 4. Texture is a very gravelly very fine sandy loam, very cobbly very fine sandy loam, or very gravelly loam. Rock fragment content is 35 to 60 percent. Effervescence is strong to violent and the reaction is moderately to strongly alkaline. Calcium carbonate equivalent is 15 to 40 percent.
The Bk horizon has a hue of 7.5YR or 10YR, value of 7 or 8 dry, 6 or 7 moist, chroma of 2 through 4. Texture is an extremely gravelly very fine sandy loam, very gravelly sandy loam, very gravelly loam, or extremely gravelly sandy loam. Rock fragment content is 35 to 70 percent. Effervescence is violent and the reaction is strongly alkaline. Calcium carbonate equivalent is 40 to 70 percent.
COMPETING SERIES: There are no other series in this family.
GEOGRAPHIC SETTING: Jardal soils are on hills, ridges, alluvial fans, and fan remnants at elevations of 5,300 to 6,500 feet. Slopes range from 5 to 50 percent. These soils formed in alluvium derived dominantly from conglomerate, sandstone, and quartzite. Average annual precipitation is 12 to 16 inches. The mean annual air temperature is 46 to 52 degrees F., and the freeze free season is 100 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bandag, Kidman, and Spager series. Bandag soils are very deep and are dominantly a loam texture throughout. Kidman soils are very deep and are dominantly a sandy loam texture throughout. Spager soils are 10 to 20 inches deep to hardpan.
DRAINAGE AND PERMEABILITY: Well to somewhat excessively drained; medium to very rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Used mainly as range. Important plants are bluebunch wheatgrass and big sagebrush.
DISTRIBUTION AND EXTENT: West Central Utah, MLRA 28A. This series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Millard County, Utah; Millard County, Eastern Part Soil Survey, 1995.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from the surface of the soil to 9 inches. (A and Bw horizon)
Calcic horizon - the zone of calcium carbonate accumulation from 9 to 26 inches. (Bk horizon)
Petrocalcic horizon - the zone of indurated calcium carbonate accumulation with a trowelled surface that stops roots from 26 to 30 inches. (Bkm horizon)
The classification is based on the "Keys to Soil Taxonomy, Eighth Edition, 1998".