LOCATION AZUVINA CA
Established Series
RLR/GML
02/2017
AZUVINA SERIES
The Azuvina series consists of very deep, well drained soils that formed in old alluvium weathered from granitic sources. Azuvina soils are on alluvial fans and fan remnants, often in urban areas where surface modification is common. Slopes are 0 to 15 percent. The mean annual precipitation is about 450 millimeters and the mean annual temperature is about 18 degrees C.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Typic Argixerolls
TYPICAL PEDON: Azuvina, loam, on a city park lawn. (Colors are for dry soil unless otherwise noted).
^A1--0 to 13 cm; very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; weak medium granular structure; friable, moderately hard, moderately sticky and slightly plastic; common very fine tubular pores; moderately alkaline (pH 7.9); clear wavy boundary.
^A2--13 to 35 cm; brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; weak medium subangular blocky structure; friable, moderately hard, moderately sticky and slightly plastic; few medium and common very fine tubular pores; 2 percent gravels; moderately alkaline (H 8.2); clear wavy boundary. (Combined thickness of the A horizons is 25 to 65 cm thick)
Bt1--35 to 60 cm; brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; friable, moderately sticky and moderately plastic; few medium and common very fine tubular pores; distinct clay films on all faces of peds; 1 percent gravels; slightly alkaline (pH 7.7); clear wavy boundary.
Bt2--60 to 110 cm; strong brown (7.5YR 4/6) sandy clay loam, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; friable, moderately sticky and moderately plastic; common very fine tubular pores; common distinct clay films on all faces of peds; 1 percent gravels; slightly alkaline (pH 7.7); clear wavy boundary. (Combined thickness of the Bt horizons is 70 to 130 cm thick)
BCt1--110 to 145 cm; strong brown (7.5YR 4/6) fine sandy loam, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; friable, moderately sticky and moderately plastic; common very fine tubular pores; common distinct clay films on all faces of peds; 5 percent gravels; slightly alkaline (pH 7.8); clear wavy boundary.
BCt2--145 to 200 cm; strong brown (7.5YR 4/6) fine sandy loam, brown (7.5YR 4/4) moist; weak fine subangular blocky structure; friable, moderately sticky and moderately plastic; common very fine tubular pores; common faint clay bridges between sand grains; 1 percent gravels; slightly alkaline (pH 7.5).
TYPE LOCATION: Los Angeles County, California, Montebello Park, Montebello, CA in front lawn 50 feet east of Park St, 200 feet south of Whittier Blvd, 34 degrees, 0 minutes, 40 seconds North latitude and 118 degrees, 6 minutes, 56 seconds West longitude, WGS84 - U.S.G.S Quad: El Monte.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil becomes moist below a depth of about 30 cm some time from October to December and remains moist in some part between depths of about 30 to 90 cm until April or May.
Mean annual soil temperature: 17 to 20 degrees C. The soil temperature usually does not go below 8 degrees C.
Depth to argillic horizon: 30 to 70 cm; thickness of human transported material at the surface affects this depth.
Rock fragments: 0 to 10 percent
Organic matter: 2 to 5 percent at the surface and decreasing to 1 percent or less within 50 cm of the mineral surface.
A, ^A(u) horizon:
Dry Color: hue of 10YR or 7.5YR, value of 4 or 5, chroma 2 or 3
Moist Color: hue of 10YR or 7.5YR, value of 2 to 4, chroma of 2 or 3
Texture: loam, fine sandy loam, sandy loam or sandy clay loam
Clay content: 12 to 22 percent
Bt horizon:
Dry Color: hue of 10YR or 7.5YR, value of 4 or 6, chroma of 3 to 6
Moist Color: hue of 10YR or 7.5YR, value of 3 or 4, chroma of 4
Texture: clay loam, sandy clay loam or loam
Clay contents: 21 to 33 percent
BC, BCt horizon:
Dry Color: hue of 10YR or 7.5YR, value of 4 to 7, chroma of 4 or 6
Moist Color: hue of 10YR or 7.5YR, value of 3 to 5, chroma of 4
Texture: fine sandy loam, loam or sandy clay loam
Clay content: 12 to 24 percent; the clay decreases by 6 percent or more from the overlying Bt horizon.
Notes: some pedons are hard or very hard when dry.
COMPETING SERIES:
Bohna soils: have a paralithic contact between 100 and 185 cm.
Chualar soils: averages 18 to 25 percent clay in the Bt horizon and have a frost-free season of 175 to 300 days.
Chuloak soils: have redox features in the lower B or C horizon.
Feethill soils: have a paralithic contact at a depth of 50 to 100 cm.
Flaskan soils: have 15 to 35 percent rock fragments.
Franciscan soils: have a paralithic contact of sedimentary and metamorphic rock at a depth of 50 to 100 cm.
Geghus soils: have calcium carbonates and are weathered from calcareous shale, sandstone, or conglomerate.
Longshore soils: have less than 27 percent clay in the argillic horizon and are weathered from fine-grained sandstone.
Nauti soils: have a paralithic contact at a depth of 50 to 100 cm and are weathered from diorite.
Pinto soils: are moderately well drained and formed in alluvium weathered from sedimentary sources.
Shimmon soils: have a paralithic contact of fine-grained sandstone at a depth of 50 to 100 cm.
Soper soils: have a paralithic contact at a depth of 50 to 100 cm.
Tajea soils: have a lithic contact of sandstone at a depth of 50 to 100 cm.
GEOGRAPHIC SETTING:
Landscape: alluvial plain
Landform: alluvial fans, fan remnant
Parent material: old alluvium weathered from granitic sources
Slope: 0 to 15 percent
Elevation: 0 to 650 meters
Mean annual precipitation: 320 to 650 mm
Mean annual temperature: 16 to 20 degrees C
Frost-free season: 300 to 365 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Ballona soils: have greater than 35 percent clay and have a mollic epipedon that is greater than 50 cm thick.
Botella soils: have greater than 1 percent organic matter to a depth of 75 cm and are on similar landscape positions.
Grommet soils: have a mollic epipedon that is greater than 50 cm thick and are on alluvial fans and plains.
Montebello soils: have human-transported materials typically 100 cm thick or more and on adjacent anthropogenic landforms.
Palmview soils: have less than 18 percent clay and are on slightly lower alluvial fans.
Ramona soils: have an ochric epipedon and occur on similar landscape positions.
Tujunga soils: have sandy textures and are on alluvial fans and floodplains.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; moderate saturated hydraulic conductivity.
USE AND VEGETATION: Azuvina soils are used for residential and commercial development in urban areas. In farmland, it is used for growing field, forage, truck crops, citrus, and range. Vegetation in uncultivated areas have a cover of annual grasses, forbs, scattered oak trees, sagebrush, chamise, and ornamentals in urban areas.
DISTRIBUTION AND EXTENT: Coastal plains and inland valleys of southern California in MLRA 19 - Southern California Coastal Plain. These soils are moderately extensive.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: City of Montebello, Los Angeles County, California 2016.
REMARKS:
Diagnostic horizons recognized in the pedon include:
Mollic epipedon - the zone from a depth of 0 to 35 cm
Human-transported materials - the zone from a depth of 0 to 35 cm
Argillic horizon - the zone from a depth of 35 to 110 cm
Particle size control section - the zone from a depth of 35 to 85 cm
ADDITIONAL DATA:
User Pedon ID: S2014CA037003
KSSL Lab Pedon: 14N0534
Classified using the Twelfth Edition Keys to Soil Taxonomy (2014)
National Cooperative Soil Survey
U.S.A.