LOCATION MIVIDA UTEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Ustic Haplocalcids
TYPICAL PEDON: Mivida fine sandy loam--rangeland. (Colors are for air-dry soil unless otherwise stated.)
A--0 to 7 inches; reddish brown (5YR 5/4) fine sandy loam, reddish brown (5YR 4/4) moist; weak thin platy structure; soft, very friable; common very fine and fine and few medium roots; few very fine and fine tubular pores; slightly calcareous, carbonates are disseminated; moderately alkaline (pH 8.0); abrupt smooth boundary. (2 to 7 inches thick)
Bw1--7 to 16 inches; reddish yellow (5YR 6/6) fine sandy loam, yellowish red (5YR 4/6) moist; weak medium subangular blocky structure; slightly hard, very friable; common very fine and fine and few medium roots; few fine tubular pores; moderately calcareous, carbonates are disseminated; moderately alkaline (pH 8.0); clear smooth boundary. (6 to 21 inches thick)
Bw2--16 to 22 inches; reddish yellow (5YR 6/6) fine sandy loam, yellowish red (5YR 4/6) moist; moderate medium subangular blocky structure; hard, friable; few very fine and fine roots; common very fine and few fine pores; moderately calcareous, carbonates are disseminated; moderately alkaline (pH 8.2); abrupt wavy boundary. (0 to 18 inches thick)
Bk1--22 to 52 inches; pink (5YR 8/3) fine sandy loam, yellowish red (5YR 4/6) moist; massive; hard, very friable; few very fine roots; strongly calcareous, carbonates are segregated in common medium soft seams and veins; strongly alkaline (pH 8.6); clear wavy boundary. (7 to 30 inches thick)
Bk2--52 to 60 inches; pink (5YR 8/3) fine sandy loam, yellowish red (5YR 4/6) moist; massive; hard, very friable; strongly calcareous, carbonates are segregated in seams; strongly alkaline (pH 8.6).
TYPE LOCATION: San Juan County, Utah; along the Mormon Trail, 2,000 feet east and 3,500 feet north of the northwest corner of sec. 32., T. 39 S., R. 20 E. in an area lacking a cadastral survey.
RANGE IN CHARACTERISTICS:
Soil moisture: Ustic aridic moisture regime
Mean annual soil temperature: 47 to 56 degrees F.
Depth to bedrock: 40 to 60 inches or more
Depth to calcic horizon: 20 to 30 inches
Rock fragments: 0 to 15 percent fine gravel
Sand content: 15 to 40 percent fine sand or coarser
Clay content: 8 to 18 percent
A horizon
Hue: 5YR or 7.5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 4 to 6
Bw horizon
Value: 4 to 7 dry, 4 or 5 moist
Chroma: 4 to 6
Texture: very fine sandy loam, fine sandy loam and sandy loam
2Bk horizon
Hue: 5YR or 7.5YR
Value: 6 or 7 dry, 4 to 6 moist
Chroma: 3 to 6
Texture: fine sandy loam, sandy loam and loam
Calcium carbonate equivalent: 15 to 40 percent
Reaction: moderately alkaline or strongly alkaline
2C horizon
Value: 5 or 6 dry, 4 to 6 moist
Chroma: 4 to 6
Reaction: moderately alkaline or strongly alkaline
COMPETING SERIES: These are the
Abracon (UT),
Anasazi (UT),
Chroder (CO),
Chugcity (WY),
Chupadera (NM),
Cobbra (UT),
Harvey (NM),
Milok (UT),
Nala (CO),
Sazi (UT), and
Yattle (CO) series.
Abracon and Harvey soils average less than 18 percent silicate clay, but have 18 to 35 percent total clay.
Abracon and Harvey soils have shallower depth to the top of the calcic horizon.
Anasazi, Chupadera and Sazi soils have bedrock at a depth of 20 to 40 inches.
Chugcity soils have a paralithic contact at 20 to 40 inches.
Chroder, Chupadera soils also have hue yellower than 7.5YR.
Cobbra soils have lithologic discontinuities with glaciofluvial deposits.
Milok soils have a calcic horizon within 20 inches of the surface.
Chugcity, Chupadera, and Harvey soils are in the Western Great
Plains (LRR-G) and are more moist in
May and June.
Nala soils rock fragment content average 15 to 25 percent gravel, 0 to 5 percent cobbles.
Yattle soils contain 5 to 15 percent calcium carbonate equivalent:
GEOGRAPHIC SETTING:
Parent Material: eolian and alluvium deposits over sandstone
Landform: structural benches, plains on structural benches, fan terraces and cuestas
Elevation: 4,400 to 6,600 feet
Slope: 0 to 15 percent
Mean annual temperature: 45 to 54 degrees F
Mean annual precipitation: 8 to 13 inches
About 50 to 60 percent of the precipitation occurs during the growing season
Frost-free period: 100 to 160 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Begay, Mespun, Palma and Windwhistle soils and the competing Anasazi soils. Begay soils do not have a calcic horizon. Mespun soils have a sandy particle-size control section. Palma and Windwhistle soils have an argillic horizon. Windwhistle soils are also moderately deep to bedrock.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderately rapid permeability.
USE AND VEGETATION: These soils are used for rangeland, irrigated cropland, wildlife habitat and recreation. Potential vegetation is mainly needleandthread, fourwing saltbush, Indian ricegrass and winterfat. Principle crops are alfalfa and small grains.
DISTRIBUTION AND EXTENT: Southeastern Utah; MLRA 34A, 34B, 35. The series is moderately extensive.
MLRA OFFICE RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Canyonlands Area, San Juan County, Utah, 1980.
REMARKS: Diagnostic features and horizons recognized in this pedon are:
Ochric epipedon - the zone from the surface to 7 inches. (A horizon)
Cambic horizon - the zone from 7 to 22 inches. (Bw1 and Bw2 horizons)
Calcic horizon - the zone from 22 to 60 inches. (Bk1 and Bk2 horizons)
Classified according to Soil Taxonomy Ninth Edition, 2003.
ADDITIONAL DATA: Laboratory sample number 582UT-037-005.