IDENTIFIERS

  • Current Taxon Name (Soil Name): unnamed
  • OSD
  • Series Extent
  • User Site ID: S1972CA013008
  • User Pedon ID: S1972CA013008
  • Vegetation Plot ID: S1972CA013008
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 72C0009
  • NCSS Pedon Lab Data NASIS Record ID - 43943
  • Print Date: 4/28/2024

    • LOCATION

  • Township: 1S
  • Range: 2W
  • Section: 8
  • PLSS Details: SW 1/4 SW 1/4 NE 1/4
  • Location Description: 2500 feet northwest of intersection of Rheem Blvd and St. Mary's Rd.
  • 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 & GMK
  • Current Taxonomic Class: Fine, montmorillonitic, thermic Typic Argixerolls
  • Pedon Record Orgin: NASIS
  • Pedon #: 8
  • Correlated Information:
  • Soil Name - unnamed
  • Classificaton Date - 7/24/2007
  • Sampled As Information:
  • Soil Name - Los Osos
  • Classificaton Date - 4/14/1972
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: shale
  • Landform: upland slope
  • Slope Shape Down: concave
  • Runoff: medium
  • Drainage Class: moderately well
  • Bedrock: shale, unspecified
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/14/1972 (actual site observation date)
  • Air Photo ID: BUU6V146
  • 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

    AESCU

    BRDI3

    HORDE

    POCA25

    URTIC

    Aesculus

    Bromus diandrus

    Hordeum

    Polystichum californicum

    Urtica

    buckeye

    ripgut brome

    barley

    California swordfern

    nettle

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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

    45

    —

    —

    207

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    45

    508

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    14.4

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    A11—0 to 18 centimeters (0.0 to 7.1 inches);, dark brown (10YR 3/3), moist; clay loam; weak coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 3.0 very fine roots and 0.5 fine and medium roots and 0.5 coarse roots; 0.5 very fine tubular pores; fragments; slightly acid, pH 6.5; gradual wavy boundary. Lab sample # 72C00058
    A12—18 to 48 centimeters (7.1 to 18.9 inches);, very pale brown (10YR 8/4) and dark yellowish brown (10YR 3/6), moist; clay loam; weak coarse angular blocky structure; hard, friable, moderately sticky, moderately plastic; 0.5 very fine and fine roots and 0.5 medium roots; 0.5 very fine tubular pores; fragments; neutral, pH 6.8; clear wavy boundary. Lab sample # 72C00059
    B21—48 to 63 centimeters (18.9 to 24.8 inches);, light red (2.5YR 6/6) and weak red (2.5YR 4/2), moist; clay; weak medium and coarse angular blocky structure; very hard, friable, moderately sticky, very plastic; 0.5 very fine and fine roots and 0.5 medium roots; 0.5 very fine tubular pores; 30 percent thin clay films on all faces of peds; fragments; neutral, pH 7.0; gradual wavy boundary. Lab sample # 72C00060
    B22—63 to 86 centimeters (24.8 to 33.9 inches);, weak red (2.5YR 4/2) and red (2.5YR 4/6), moist; clay; weak medium and coarse angular blocky structure; very hard, friable, moderately sticky, very plastic; 0.5 very fine roots; 0.5 very fine tubular pores; 10 percent thin clay films on all faces of peds; 15 percent by volume 5-?-16 millimeter shale, unspecified fragments; slightly alkaline, pH 7.5; clear wavy boundary. Lab sample # 72C00061
    C1—86 to 107 centimeters (33.9 to 42.1 inches);, dark grayish brown (2.5Y 4/2), moist; bedrock; fragments; slightly alkaline, pH 7.5; clear wavy boundary. Lab sample # 72C00062
    C2—107 to 152 centimeters (42.1 to 59.8 inches); bedrock; fragments; gradual wavy boundary. Lab sample # 72C00063
    C3—152 to 191 centimeters (59.8 to 75.2 inches); bedrock; fragments. Lab sample # 72C00064