LOCATION BISCAILUZ CA
Established Series
MEB/KP/RLR
01/2017
BISCAILUZ SERIES
The Biscailuz series consists of very deep, somewhat poorly drained soils that formed in alluvium from mixed rock sources. Biscailuz soils are on floodplains and lowlands. Slopes range from 0 to 5 percent. The mean annual precipitation is about 410 mm and the mean annual temperature is about 18 degrees C.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Oxyaquic Haploxerolls
TYPICAL PEDON: Biscailuz, loam. When described the soil was dry throughout. (Colors are for dry soil unless otherwise noted).
Ap--0 to 32 centimeters; very dark brown (10YR 2/2) loam, very dark grayish brown (10YR 3/2), moist; weak medium subangular blocky structure; moderately hard; friable; moderately sticky, moderately plastic; common fine interstitial and common very fine tubular pores; carbonate, finely disseminated; few rounded gravels; strongly effervescent; slightly alkaline (pH 7.5); clear smooth boundary. (20 to 90 cm)
Bk1--32 to 70 centimeters; light brownish gray (2.5Y 6/2) loam, very dark brown (10YR 2/2), moist; moderate medium subangular blocky structure; friable; moderately sticky, moderately plastic; common very fine tubular pores; finely disseminated carbonate and common threadlike carbonate masses in matrix; few rounded gravels; strongly effervescent; slightly alkaline (pH 7.5); clear wavy boundary.
Bk2--70 to 95 centimeters; light yellowish brown (2.5Y 6/3) loam, very dark grayish brown (2.5Y 3/2), moist; moderate medium subangular blocky structure; friable; common very fine tubular pores; common medium threadlike carbonate masses in matrix; few rounded gravels; violent effervescence; slightly alkaline (pH 7.5); clear wavy boundary. (Combined thickness of Bk horizons is 0 to 110 cm)
Bkg--95 to 125 centimeters; sandy clay loam, grayish brown (2.5Y 5/2), moist; moderate medium subangular blocky structure; friable; common very fine tubular pores; common irregular light olive brown (2.5Y 5/6) masses of oxidized iron; common medium irregular carbonate masses in matrix; few rounded gravels; strongly effervescent; moderately alkaline (pH 8.0); clear wavy boundary. (0 to 45 cm)
C1--125 to 145 centimeters; sandy loam, light olive brown (2.5Y 5/3), moist; massive; friable; common medium distinct irregular light olive brown (2.5Y 5/6) masses of oxidized iron; common gravels; moderately alkaline (pH 8.0); clear wavy boundary.
C2--145 to 200 centimeters; sand, light olive brown (2.5Y 5/4), moist; massive; loose; few coarse distinct irregular light olive brown (2.5Y 5/6) masses of oxidized iron; common gravels; moderately alkaline (pH 8.0).
TYPE LOCATION: Los Angeles County, California, Calpoly Pomona University farm, 340 meters south of farm road entrance on Valley Blvd and 220 meters east of San Jose Creek, Pomona, CA; 34 degrees North latitude, 2 minutes, 15 seconds and 118 degrees, 49 minutes, 5 seconds West longitude, NAD83 - U.S.G.S Quad: San Dimas, California.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil becomes moist below a depth of about 30 centimeters some time from October to December and remains moist in some part between depths of about 30 to 90 centimeters until April or May. It is dry the remainder of the year.
Soil temperature: 16 to 19 degrees C
Rock fragments: 0 to 10 percent.
Reaction: slightly to moderately alkaline.
Calcium carbonate: finely disseminated carbonate and/or masses in the A or B horizon. Some pedons have disseminated carbonate in the C horizon.
Depth to aquic conditions: 35 to 110 cm.
A(p) and ^A(u) horizon:
Dry color: hue of 10YR or 2.5Y, value of 3 to 5, hue of 2 or 3
Color: hue of 10YR or 2.5Y, value of 2 or 3, chroma of 2 to 3
Texture: loam, silt loam, silty clay loam, clay loam
Clay content: 15 to 33 percent
Artifacts: 0 to 3 percent innocuous construction debris
Bk horizon:
Dry color: hue of 2.5Y or 10YR, value of 4 to 6, chroma of 2 to 4
Moist color: hue of 2.5Y or 10YR, value of 2 to 5, chroma of 2 to 4
Texture: loam, clay loam, silty clay loam, sandy clay loam
Pressure faces: some horizons have pressure faces on ped faces
Clay content: 20 to 33 percent
C, Cg horizons:
Dry color: hue of 2.5Y to 10YR, value of 5 to 7, chroma: 1 to 4
Moist color: hue of 2.5Y or 10YR, value of 4 to 6, chroma of 1 to 4
Texture: loamy sand, sandy loam, sand, sandy clay loam; some horizons are stratified and some pedons have thin lenses with finer textured soil
Clay content: 3 to 15 percent
2Ab horizon: (where present)
Dry color: hue of 2.5Y or 10YR, value of 4 to 7, hue of 2 to 4
Moist color: hue of 2.5Y or 10YR, value of 2 to 4, value of 1 to 3
Texture: silt loam, silty clay loam, silty clay, loam, fine sandy loam
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landscape: alluvial plains, coastal plains.
Landform: alluvial fans, floodplains, and lowlands.
Parent Material: alluvium from mixed rock sources.
Slopes: 0 to 5 percent.
Elevation: 0 to 350 meters.
Climate: warm, dry summers and cool, moist winters.
Mean annual precipitation: 280 to 580 mm.
Mean annual temperature: 16.5 to 20 degrees C.
Frost free season: 300 to 365 days.
GEOGRAPHICALLY ASSOCIATED SOILS:
Bolsa series - have less than 15 percent fine sand or coarser soil particles and are on floodplains or basins typically near the coastline.
Chino series - are formed in alluvium weathered from granitic sources and are on similar landscape positions.
Hueneme series - have a less than 18 percent clay and are on alluvial fans and floodplains.
Metz series - have sandy textures and are on floodplains.
Mocho series - has an irregular decrease in organic carbon and are on alluvial fans.
Pico series - has an irregular decrease of organic matter and are well drained on alluviual fans and floodplains.
San Emigdio series - have less than 18 percent clay and have an ochric epipedon on alluvial fans and floodplains.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained; low and medium runoff; moderate or moderately slow permeability. Many area have been drained by pumping of the water table and concrete lining of channelized stream.
USE AND VEGETATION: This soil is used for urban residential and commercial development. Ornamental plants and turf-grass are common in these areas. On agricultural lands, row and truck crops are grown.
DISTRIBUTION AND EXTENT: Coastal plains and valleys of MLRA 19 - Southern California Coastal Plain. These soils are of moderate extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Los Angeles County, California 2016. Proposed 2012.
REMARKS:
Diagnostic horizons recognized in the pedon:
Mollic epipedon - the zone from a depth of 0 to 32 cm
Cambic horizon - the zone from a depth of 32 to 125
Secondary carbonates - the zone from a depth of 32 to 125 cm
Redox depletions with chroma 2 or less - the zone from a depth of 95 to 145 cm
Aquic conditions - the zone from a depth of 95 to 200 cm
Redox concentrations - the zone from a depth of 95 to 200 cm
Particle size control section - the zone from a depth of 25 to 100 cm
ADDITIONAL DATA:
NASIS User Pedon ID: 2011CA696573
Classified using the Twelfth Edition of Soil Taxonomy (2014)
National Cooperative Soil Survey
U.S.A.