LOCATION JOVINE IDEstablished Series
TAXONOMIC CLASS: Coarse-silty, mixed, superactive, frigid Cumulic Haploxerolls
TYPICAL PEDON: Jovine silt loam - on a nearly level stream terrace in nonirrigated cropland at 5,000 feet elevation. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 7 inches; grayish brown (10YR 5/2) silt loam, very dark brown (10YR 2/2) moist; weak fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and common fine roots; common very fine tubular and irregular pores; 3 percent gravel; neutral (pH 7.3); clear wavy boundary. (5 to 12 inches thick)
Bw1--7 to 18 inches; brown (10YR 5/3) silt loam, very dark grayish brown (10YR 3/2) moist; moderate medium and coarse subangular blocky structure; hard, very friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine tubular pores; 1 percent fine gravel; neutral (pH 7.2); gradual wavy boundary. (7 to 14 inches thick)
Bw2--18 to 29 inches; brown (10YR 5/3) silt loam, very dark brown (10YR 2/2) moist; weak fine prismatic structure parting to weak fine subangular blocky; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and fine tubular pores; slightly alkaline (pH 7.8); gradual wavy boundary. (8 to 12 inches thick)
Bw3--29 to 44 inches; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2) moist; weak medium prismatic structure parting to weak fine and medium subangular blocky; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and few fine tubular pores; slightly alkaline (pH 7.7); gradual wavy boundary. (0 to 17 inches thick)
Bw4--44 to 60 inches; dark grayish brown (10YR 4/2) silt loam, very dark grayish brown (10YR 3/2) moist; weak medium prismatic structure parting to weak fine and medium subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine and few fine tubular pores; 5 percent gravel; 5 percent weakly cemented groundwater carbonate nodules; slightly alkaline (pH 7.6).
TYPE LOCATION: Oneida County, Idaho; about 7 miles north and 1 mile east of Holbrook; approximately 350 feet west and 50 feet north of the southeast corner of section 20, T. 13 S., R. 33 E.; USGS Buist 7.5 minute topographic quadrangle; 42 degrees, 16 minutes, 09 seconds north latitude and 112 degrees, 37 minutes, 01 seconds west longitude, NAD83.
RANGE IN CHARACTERISTICS:
Thickness of the mollic epipedon - 45 to 60 inches
Average annual soil temperature - 43 to 46 degrees F.
Control section averages - 15 to 18 percent clay and 0 to 5 percent coarse fragments
Depth to finely disseminated carbonates - greater than 60 inches
Depth to seasonal high water table - 5 to 6 feet in April through June
A horizon
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Reaction - neutral or slightly alkaline
Bw horizon
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Reaction - neutral or slightly alkaline
COMPETING SERIES: These are the Joevar and Wagonjacket series. The Joevar soils have mollic epipedons thinner than 45 inches and are calcareous above 60 inches. The Wagonjacket soils have mottles at 14 to 26 inches, are somewhat poorly drained and have mollic epipedons less than 45 inches thick.
GEOGRAPHIC SETTING: Jovine soils are on depressions and low stream terraces at elevations of 4,900 to 5,200 feet. They formed in alluvium derived from mixed sources. Slopes are 0 to 2 percent. The mean annual precipitation is 13 to 16 inches. The mean annual air temperature is 42 to 45 degrees F. The frost-free period is 80 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Buist, Iphil and Ririe soils. Buist soils are loamy-skeletal and are on terrace escarpments. Iphil soils are calcareous throughout and Ririe soils are calcareous below 16 inches. Iphil and Ririe soils are on adjacent terraces.
DRAINAGE AND PERMEABILITY: Moderately well drained; low surface runoff; moderate permeability (moderately high or high saturated hydraulic conductivity). These soils are susceptible to rare flooding for very brief periods between March and June.
USE AND VEGETATION: Irrigated and nonirrigated cropland. Dominant crops are wheat, barley and alfalfa.
DISTRIBUTION AND EXTENT: Southeastern Idaho. These soils are not extensive (about 2,300 acres). MLRA 13.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Oneida County, Idaho, 1994.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon (cumulic feature) - The zone from the soil surface to 60 inches (Ap, Bw1, Bw2, Bw3 and Bw4 horizons)
Particle-size control section - The zone from 10 to 40 inches (part of the Bw1, the Bw2 and part of the Bw3 horizons)