LOCATION HI VISTA CA
Established Series
Rev. RWK/MAV/JJJ/ARW/KJO
04/2015
HI VISTA SERIES
The Hi Vista series consists of moderately deep to rock, well drained soils, that formed in residuum from granitic rock. Hi Vista soils are on hills and rock pediments. Slopes ranges from 2 to 50 percent. The mean annual precipitation is about 5 inches and the mean annual temperature is about 63 degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Typic Haplargids
TYPICAL PEDON: Hi Vista loamy fine sand, native desert shrubs. (Colors are for dry soil unless otherwise stated).
A--0 to 6 inches; light yellowish brown (10YR 6/4) loamy fine sand, yellowish brown (10YR 5/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; common very fine roots; common very fine interstitial pores; neutral (pH 7.2); clear wavy boundary. (6 to 10 inches thick)
Bt1--6 to 11 inches; brown (7.5YR 5/4) clay loam, dark brown (7.5YR 4/4) moist; massive; hard, friable, slightly sticky and slightly plastic; many faint clay films lining pores and as bridges; very slightly effervescent, carbonates disseminated; slightly alkaline (pH 7.5); clear wavy boundary. (5 to 8 inches thick)
Bt2--11 to 21 inches; reddish brown (5YR 5/4) sandy clay loam, reddish brown (5YR 4/4) moist; moderate fine and medium angular blocky structure; hard, firm, sticky and plastic; few very fine roots; many very fine interstitial, few fine tubular pores; few distinct clay films lining pores and as bridges; about 10 to 15 percent fine gravel; slightly effervescent, carbonates disseminated; slightly alkaline (pH 7.5); gradual wavy boundary. (9 to 13 inches thick)
Bt3--21 to 29 inches; yellowish red (5YR 5/6) gravelly sandy clay loam, yellowish red (5YR 4/6) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; many very fine interstitial, common very fine tubular pores; many distinct clay films lining pores and as bridges; 35 percent fine gravel; slightly effervescent, carbonates disseminated; moderately alkaline (pH 8.0); gradual wavy boundary. (0 to 9 inches thick)
R--29 inches; hard granitic rock.
TYPE LOCATION: Los Angeles County, California; near the small community of Hi Vista; about 125 feet west of middle of the road at intersection of Avenue I and 200th Street E., NE 1/4, NW 1/4 section 12, T. 7 N., R. 9 W.
RANGE IN CHARACTERISTICS: Depth to a lithic contact is 20 to 40 inches. The mean annual soil temperature is about 65 degrees F. The soil between the depths of 6 and 15 inches is usually dry and is not moist in most years for as long as 60 consecutive days in winter and spring. Rock fragments are usually 2 to 5mm in diameter. No horizon has more than 5 percent calcium carbonate equivalent.
A horizon--10YR 5/3, 5/4, 6/3, 6/4 dry; 10YR 4/3, 4/4, 5/3, 5/4 moist. Texture: Loamy fine sand, sandy loam, coarse sandy loam and extremely gravelly sandy loam.
Structure: Weak granular or platy structure, or it is massive or single grained.
Reaction: Neutral to moderately alkaline.
The B horizon has dry colors of 10YR 4/4, 5/4, 5/6; 7.5YR 5/4, 5/6; 5YR 5/3, 5/4, 5/6. 10YR 3/4, 4/4; 7.5YR 4/4; 5YR 4/3, 4/4, 4/6 moist. Texture: Clay loam, loam, sandy clay loam, gravelly clay loam and gravelly sandy clay loam.
Carbonates: None to strongly effervescent, carbonates disseminated. Coarse fragments: 0 to 35 percent rock fragments.
Reaction: Neutral to moderately alkaline
Other features: A Cr horizon above the bedrock occurs in some pedons, and a Bt3 or BCt horizon occurs in some pedons.
COMPETING SERIES: These are the
Anway,
Avenal,
Berino,
Bryman,
Bucklebar,
Cornville,
Dona Ana,
Garlock,
Hap,
Kidwell,
Lanip,
Madurez,
Milham,
Mirage,
Mohave,
Neuralia,
Palomas and
Tres Hermanos series. All of these soils are deeper than 40 inches to a lithic contact.
GEOGRAPHIC SETTING: Hi Vista soils are on hills and rock pediments. Slopes are 2 to 50 percent. The soils formed in residuum from granitic rock. Rock outcrop is present in some areas. Elevations are 2300 to 3300 feet. The climate is arid with long, hot summers and cool, somewhat moist winters. The mean annual precipitation is 4 to 6 inches with brief periods of snow. The mean annual temperature is 60 to 65 degrees F. Mean July temperature is about 80 degrees F., and mean January temperature is about 44 degrees F. The frost-free season is 200 to 250 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Adelanto,
Cajon,
Calvista,
Machone and
Randsburg soils. Adelanto soils have less than 18 percent clay and do not have a lithic contact. Cajon soils do not have Bt horizons and a lithic contact. Calvista soils are 14 to 20 inches deep to a lithic contact. Machone soils are sandy loam or coarse sandy loam throughout on hills and rock pediments. Randsburg soils are shallow to weathered granitic rock on hills and rock pediments.
DRAINAGE AND PERMEABILITY: Well drained; medium, high or very high runoff; moderately slow permeability.
USE AND VEGETATION: Provide sparse grazing in some years. These soils are used for recreation and military operations. Vegetation is creosotebush, buckwheat, Indian ricegrass, and Joshua trees.
DISTRIBUTION AND EXTENT: High desert of southern California. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA
SERIES PROPOSED: Los Angeles County, California, 1973. The name is from the small community of Hi Vista.
REMARKS: Diagnostic horizons and features recognized in the profile are:
1. Ochric epipedon--the zone from the soil surface to 6 inches (A horizon).
2. Argillic horizon--the zone from 6 to 29 inches (Bt1, Bt2, and Bt3 horizons)
ADDITIONAL DATA:
1. Thermic temperature regime--MAAT 60 to 65 degrees F.
2. Mixed mineralogy
3. Fine-loamy particle size class
4. Aridic moisture regime--MAP 4 to 6 inches.
Series reclassified on September, 1994. Competing series not reviewed at that time.
Runoff classes based on Ksat and slope as described in "Terminology Used in Soil Survey Data Entry or Manuscript Editing of: 9-23-94 MAV." Runoff changed from slow to rapid TO medium to very high.
Responsibility for this series was transferred from Davis to Phoenix 4/2015. The last revision to the series was 2/1997. ET
National Cooperative Soil Survey
U.S.A.