IDENTIFIERS

  • Current Taxon Name (Soil Name): unnamed
  • OSD
  • Series Extent
  • User Site ID: S1972CA013001
  • User Pedon ID: S1972CA013001
  • Vegetation Plot ID: S1972CA013001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 72C0003
  • NCSS Pedon Lab Data NASIS Record ID - 43937
  • Print Date: 4/27/2024

    • LOCATION

  • Location Description: 1/2 mile east of Cummings Skyway Triangulation from BM 245 137W of North, BM 49 525W of North, BM 246 179E of W
  • Map Unit: LhF—Los Osos clay loam, 30 to 50 percent slopes
  • State: California
  • County: CA013—Contra Costa
  • Non-MLRA Soil Survey Area: CA013—Contra Costa County, California

    • PEDON

  • Describers Name: LEW & DRM
  • Current Taxonomic Class: Fine, montmorillonitic, thermic Typic Argixerolls
  • Pedon Record Orgin: NASIS
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - unnamed
  • Classificaton Date - 7/24/2007
  • Sampled As Information:
  • Soil Name - Los Osos
  • Classificaton Date - 4/10/1972
  • Dynamic Soil Properties:
  • Erosion Class - 2
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: sandstone and shale
  • Landform: upland slope
  • Slope Shape Down: convex
  • Runoff: very high
  • Drainage Class: well
  • Bedrock: sandstone and shale
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/10/1972 (actual site observation date)
  • Air Photo ID: BUU12V42
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    AVSA

    BRDI3

    HORDE

    Avena sativa

    Bromus diandrus

    Hordeum

    common oat

    ripgut brome

    barley

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    Setting and Climate
    Slope Slope Length USLE Upslope Length Elev. Corr. Elev Aspect MAP REAP FFD MAAT MSAT MWAT MAST MSST MWST MFFP PE Index Climate Station ID Climate Station Name Climate Station Type
    % m degrees mm mm C mm

    37

    —

    —

    241

    —

    225

    508

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    15

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    A11—0 to 13 centimeters (0.0 to 5.1 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; clay loam; moderate medium subangular blocky structure; very hard, friable, moderately sticky, moderately plastic; 21.0 very fine roots and 0.5 fine roots; 0.5 very fine tubular pores; fragments; slightly acid, pH 6.5; gradual wavy boundary. Lab sample # 72C00015
    A12—13 to 26 centimeters (5.1 to 10.2 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; clay loam; moderate medium subangular blocky structure; very hard, friable, moderately sticky, moderately plastic; 21.0 very fine roots and 0.5 fine roots; 0.5 very fine tubular pores; fragments; neutral, pH 7.0; gradual wavy boundary. Lab sample # 72C00016
    A13—26 to 56 centimeters (10.2 to 22.0 inches);, brown (10YR 4/3), moist; clay; weak medium subangular blocky structure; very hard, friable, moderately sticky, moderately plastic; 3.0 very fine roots and 0.5 fine roots; 0.5 very fine tubular pores; fragments; neutral, pH 7.0; clear wavy boundary. Lab sample # 72C00017
    Bt2—56 to 86 centimeters (22.0 to 33.9 inches);, brown (10YR 4/3), moist; clay; weak coarse angular blocky structure; very hard, friable, moderately sticky, moderately plastic; 0.5 very fine roots; 0.5 very fine tubular pores; 1 percent thin clay films on surfaces along pores; fragments; neutral, pH 7.3; clear wavy boundary. Lab sample # 72C00018
    C1—86 to 116 centimeters (33.9 to 45.7 inches);, yellowish brown (10YR 5/8) and brown (7.5YR 4/4) and very dark grayish brown (10YR 3/2) and olive brown (2.5Y 4/4), moist; very gravelly silty clay; hard, friable, slightly plastic; 0.5 very fine roots; 0.5 very fine tubular pores; 1 percent thin clay films on all faces of peds; fragments; slightly alkaline, pH 7.5; gradual boundary. Lab sample # 72C00019
    C2—116 to 142 centimeters (45.7 to 55.9 inches);, yellowish brown (10YR 5/6) and yellowish brown (10YR 5/4) and dark yellowish brown (10YR 4/4), moist; bedrock; 0.5 very fine roots; fragments; gradual boundary. Lab sample # 72C00020
    C3—142 to 195 centimeters (55.9 to 76.8 inches);, strong brown (7.5YR 5/6) and brown (10YR 5/3) and brown (7.5YR 4/2), moist; bedrock; fragments; gradual boundary. Lab sample # 72C00021
    C4—195 to 236 centimeters (76.8 to 92.9 inches);, very dark gray (10YR 3/1) and reddish brown (2.5YR 4/4) and red (2.5YR 5/6), moist; bedrock; fragments. Lab sample # 72C00022