IDENTIFIERS

  • Current Taxon Name (Soil Name): unnamed
  • OSD
  • Series Extent
  • User Site ID: S1972CA013006
  • User Pedon ID: S1972CA013006
  • Vegetation Plot ID: S1972CA013006
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 72C0008
  • NCSS Pedon Lab Data NASIS Record ID - 43942
  • Print Date: 11/21/2024

    • 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, mixed, thermic Typic Argixerolls
  • Pedon Record Orgin: NASIS
  • Pedon #: 6
  • Correlated Information:
  • Soil Name - unnamed
  • Classificaton Date - 7/24/2007
  • Sampled As Information:
  • Soil Name - Los Osos
  • Classificaton Date - 4/13/1972
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: interbedded 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: 4/13/1972 (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

    BRDI3

    HORDE

    POCA25

    Bromus diandrus

    Hordeum

    Polystichum californicum

    ripgut brome

    barley

    California swordfern

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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

    35

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    221

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    0

    508

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    14.4

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    A1—0 to 18 centimeters (0.0 to 7.1 inches);, yellowish red (5YR 5/8) and light brownish gray (10YR 6/2), moist; clay loam; 3 percent brown (10YR 4/3) fine prominent mottles; weak coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 21.0 very fine roots and 3.0 fine roots; 0.5 very fine tubular pores; fragments; slightly acid, pH 6.5; gradual wavy boundary. Lab sample # 72C00051
    Bt21—18 to 38 centimeters (7.1 to 15.0 inches);, dark yellowish brown (10YR 4/4) and brown (10YR 4/3), moist; clay; 3 percent yellowish brown (10YR 5/6) fine prominent mottles; weak very coarse angular blocky structure; very hard, firm, moderately sticky, very plastic; 3.0 very fine roots; 0.5 very fine tubular pores; 10 percent thin clay films on all faces of peds and 10 percent thin clay films on surfaces along pores; fragments; neutral, pH 7.0; gradual wavy boundary. Lab sample # 72C00052
    Bt22—38 to 58 centimeters (15.0 to 22.8 inches);, light olive brown (2.5Y 5/6), moist; clay; 3 percent olive brown (2.5Y 4/4) fine distinct mottles; weak coarse angular blocky structure; very hard, firm, moderately sticky, very plastic; 3.0 very fine roots; 0.5 very fine tubular pores; 10 percent thin clay films on surfaces along pores and 10 percent thin clay films on all faces of peds; fragments; neutral, pH 7.0; gradual wavy boundary. Lab sample # 72C00053
    B3—58 to 84 centimeters (22.8 to 33.1 inches);, light red (2.5YR 6/6), moist; clay; 1 percent olive (5Y 5/4) fine distinct mottles; weak medium subangular blocky structure; very hard, friable, moderately sticky, very plastic; 0.5 very fine roots; 0.5 very fine tubular pores; 75 percent thin clay films on surfaces along pores and 75 percent thin clay films on all faces of peds; 28 percent by volume shale, unspecified fragments; neutral, pH 7.0; clear wavy boundary. Lab sample # 72C00054
    2C1—84 to 109 centimeters (33.1 to 42.9 inches);, very dark grayish brown (2.5Y 3/2) crushed and olive brown (2.5Y 4/4), moist; bedrock; fragments; diffuse wavy boundary. Lab sample # 72C00055
    2C2—109 to 160 centimeters (42.9 to 63.0 inches);, dark grayish brown (2.5Y 4/2) crushed, moist; bedrock; fragments; gradual wavy boundary. Lab sample # 72C00056
    2C3—160 to 183 centimeters (63.0 to 72.0 inches);, dark grayish brown (2.5Y 4/2) crushed and dark grayish brown (2.5Y 4/2) rubbed, moist; bedrock; fragments. Lab sample # 72C00057