LOCATION ANZA CA
Established Series
Rev. CYW/TCM
06/2023
ANZA SERIES
The Anza series consists of very deep, moderately well drained soils that formed in alluvium derived from granitic and metamorphic rocks. Anza soils are on alluvial fans and have slopes of 0 to 8 percent. The mean annual precipitation is about 320 mm and the mean annual air temperature is about 14 degrees C.
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Pachic Haploxerolls
TYPICAL PEDON: Anza fine sandy loam on a north-facing slope of 2 percent at an elevation of 1400 meters under a cover of annual grasses and big sagebrush. (Colors are for dry soil unless otherwise noted).
Ap--0 to 38 cm; dark grayish brown (10YR 4/2) fine sandy loam, very dark brown (10YR 2/2) moist; weak, fine, granular structure; very friable, soft, nonsticky, nonplastic; many very fine and fine roots; many fine irregular pores; slightly acid (pH 6.5); abrupt smooth boundary. (15 to 38 cm thick)
A1--38 to 58 cm; dark grayish brown (10YR 4/2) fine sandy loam, very dark brown (10YR 2/2) moist; weak, coarse, angular blocky structure; friable, slightly hard, nonsticky, slightly plastic; many very fine and common fine roots; common fine irregular pores; slightly acid (pH 6.5); abrupt smooth boundary. (15 to 25 cm thick)
A2--58 to 91 cm; dark grayish brown (10YR 4/2) fine sandy loam, very dark brown (10YR 2/2) moist; moderate, medium, angular blocky, moderate medium angular blocky structure; friable, slightly hard, nonsticky, slightly plastic; common fine roots; common fine irregular pores; neutral (pH 7.0); abrupt wavy boundary. (7 to 35 cm thick)
C1--91 to 116 cm; very dark grayish brown (10YR 3/2) fine sandy loam, grayish brown (10YR 5/2) moist; massive; friable, hard, nonsticky, nonplastic; few, fine, faint yellowish brown (10YR 5/4) iron-manganese masses in matrix; common fine roots between peds; common medium irregular pores; moderately alkaline (pH 8.0); gradual wavy boundary. (5 to 30 cm thick)
C2--116 to 145 cm; very dark grayish brown (10YR 3/2) loamy sand, grayish brown (10YR 5/2) moist; massive; friable, hard, nonsticky, nonplastic; few, fine, faint yellowish brown (10YR 5/4) iron-manganese masses in matix; common fine roots between peds; common fine irregular pores; moderately alkaline (pH 8.0); gradual wavy boundary.
C3--145 to 175 cm; very dark grayish brown (10YR 3/2) sandy loam, grayish brown (10YR 5/2) moist; massive; friable, hard, nonsticky, nonplastic; few fine faint yellowish brown (10YR 5/4) iron-manganese masses in matrix; few fine roots; common medium pores; moderately alkaline (pH 8.0); slightly effervescent, abrupt wavy boundary.
TYPE LOCATION:
Riverside County, California; approximately 1100 feet east and 250 feet north of the SW corner of section 13, T. 7S, R. 4E; 33.55833 degrees latitude, -116.53201 degrees longitude WGS84; UTM Zone 11, 3713284n, 543440e. U.S.G.S. Quad Name: Butterfly Peak, California.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature: 13 to 15 degrees C. Soil temperature is greater than 8 degrees C the entire year. The soils have a mesic temperature regime.
Soil moisture: moist at a depth of 25 cm or more sometime from November or December and remains moist in some part until April or May. The soils have a xeric temperature regime.
Rock fragments: 0 to 5 percent gravels or cobbles throughout.
Reaction: slightly acid to moderately alkaline throughout.
Clay content: 8 to 18 percent by average in the particle-size control section.
Diagnostic Feature(s):
Mollic epipedon thickness: 50 to 91 cm
A horizons:
Hue: 10YR
Value: 3 to 5 dry, 2 or 3 moist
Chroma: 2 to 4 dry, 1 to 3 moist
Texture: very fine sandy loam, fine sandy loam, sandy loam
Clay content: 8 to 18 percent
C horizons:
Hue: 10YR
Value: 4 or 5 dry, 2 to 4 moist
Chroma: 2 to 4, dry or moist
Texture: stratified sandy loam and loamy sand
Clay content: 8 to 18 percent
COMPETING SERIES:
Dehill soils: do not have redoximorphic features and have clay bridging in the subsoil.
Edmundston: 100 to 150 centimeters to a paralithic contact of granodiorite.
Central Point soils: do not have redoximorphic features and have a cambic horizon.
Oak Glen soils: do not have redoximorphic features and have greater than 15 percent gravel throughout.
Harrisranch soils: do not have redoximorphic features and are slightly acid to neutral in the particle size control section.
Heapspeak soils: do not have redoximorphic features and are very strongly acid to slightly acid in the particle size control section.
Shayroad soils: a do not have redoximorphic features and have a mean annual air temperature of 8 to 11 degrees Celsius.
Vernado soils: 75 to 100 centimeters to a lithic contact of basalt and have a clay content of 15 to 20 percent throughout.
GEOGRAPHIC SETTING:
Landscape: valleys
Landform: alluvial fans
Slope shape: linear/linear
Parent Material: alluvium derived from granitic and metamorphic rocks
Slope: 0 to 8 percent slopes
Elevation: 1170 to 1400 meters
Mean annual precipitation: 290 to 410 mm
Mean January temperature: 8 degrees C.
Mean July temperature: 22 degrees C.
Mean annual temperature: 13 to 14 degrees C.
Frost-free season: 190 to 220 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Oak Glen soils: are well drained and on similar landforms.
Mottsville soils: are excessively drained, have a sandy particle control section on similar landforms.
Bull Trail soils: are well drained, fine-loamy and on terraces.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately-well drained, moderately rapid saturated hydraulic conductivity.
USE AND VEGETATION: Used for irrigated apples, potatoes, alfalfa, and for dryland grain, pasture, and range. Native vegetation is annual grasses and big sagebrush with oak and pine trees on occasion.
DISTRIBUTION AND EXTENT: Southern California Coastal Plains and Mountains, MLRA 19. This soil is not extensive.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California.
SERIES ESTABLISHED: Riverside County, California 1971.
REMARKS:
Diagnostic horizons and features recognized in this pedon include:
Mollic epipedon: the zone from 0 to 91 cm
Particle-size control section: the zone from 25 to 100 cm
This series was reactivated in 2023 and updated to meet National Cooperative Soil Survey standards. The Anza series was formerly combined with the Oak Glen series from San Bernadino County.
ADDITIONAL DATA:
NASIS User Site/Pedon ID: 1971CA065002
Classified using the Thirteenth Edition Keys to Soil Taxonomy (2023)
National Cooperative Soil Survey
U.S.A.