IDENTIFIERS

  • Current Taxon Name (Soil Name): unnamed
  • OSD
  • Series Extent
  • User Site ID: S1972CA013007
  • User Pedon ID: S1972CA013007
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 72C0007
  • NCSS Pedon Lab Data NASIS Record ID - 43941
  • Print Date: 4/27/2024

    • LOCATION

  • Township: 1S
  • Range: 2W
  • Section: 8
  • PLSS Details: SW 1/4 SW 1/4 NE 1/4
  • 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: Typic Argixerolls
  • Pedon Record Orgin: NASIS
  • Pedon #: 7
  • 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:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: interbedded shale
  • Landform: upland ridge
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: 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
    • 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

    —

    —

    219

    —

    0

    508

    —

    —

    14.4

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A1—0 to 20 centimeters (0.0 to 7.9 inches); grayish brown (10YR 5/2), very dark grayish brown (2.5Y 3/2), moist; clay loam; moderate medium and coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 21.0 very fine roots and 0.5 fine and medium roots; 0.5 very fine tubular pores; fragments; slightly acid, pH 6.2; gradual smooth boundary. Lab sample # 72C00045
    B1—2 to 46 centimeters (0.8 to 18.1 inches); grayish brown (2.5Y 5/2) and dark grayish brown (2.5Y 4/2), very dark grayish brown (2.5Y 3/2), moist; clay loam; moderate fine and medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 21.0 very fine roots and 0.5 medium roots and 3.0 fine roots; 0.5 very fine tubular pores; fragments; slightly acid, pH 6.5; gradual wavy boundary. Lab sample # 72C00046
    B21—46 to 66 centimeters (18.1 to 26.0 inches); yellowish brown (10YR 5/4) and pale brown (10YR 6/3), brown (10YR 4/3) and yellowish brown (10YR 5/4), moist; clay loam; weak medium angular blocky structure; hard, friable; 0.5 very fine and fine roots and 0.5 medium roots; 0.5 very fine tubular pores; 30 percent thin clay films on surfaces along pores and 30 percent thin clay films on all faces of peds; fragments; slightly acid, pH 6.5; gradual boundary. Lab sample # 72C00047
    B22—66 to 89 centimeters (26.0 to 35.0 inches);, yellowish brown (10YR 5/8) and yellowish brown (10YR 5/4) and brown (10YR 4/3), moist; clay loam; weak medium angular blocky structure; very hard, firm; 0.5 very fine and fine roots; 0.5 very fine tubular pores; 30 percent thin clay films on surfaces along pores and 30 percent thin clay films on all faces of peds; fragments; neutral, pH 7.0; abrupt wavy boundary. Lab sample # 72C00048
    C1—89 to 109 centimeters (35.0 to 42.9 inches);, yellowish brown (10YR 5/4) crushed and brownish yellow (10YR 6/6) crushed, moist; bedrock; massive; 0.5 very fine roots; fragments; neutral, pH 7.0; gradual wavy boundary. Lab sample # 72C00049
    C2—109 to 125 centimeters (42.9 to 49.2 inches); bedrock; massive; fragments; neutral, pH 7.0. Lab sample # 72C00050