IDENTIFIERS

  • Current Taxon Name (Soil Name): Sweeney
  • OSD
  • Series Extent
  • User Site ID: S1955CA081010
  • User Pedon ID: S1955CA081010
  • Vegetation Plot ID: S1955CA081010
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3048
  • NCSS Pedon Lab Data NASIS Record ID - 38177
  • Print Date: 11/27/2024

    • LOCATION

  • Location In Web Soil Survey
  • AOI is roughly a square mile and pedon is marked in the center.
  • Location in SoilWeb
  • Location in Google Maps
  • Std. Latitude: 37.3413887
  • Std. Longitude: -122.2230530
  • Datum: WGS84
  • Location Description: In the San Mateo County SCD, west side of Highway No. 5 (Skyline Highway), 4.5 miles south of Sky Londa. See Sheet 24, Soil Survey of San Mateo Area.
  • State: California
  • County: CA081—San Mateo
  • MLRA: 4B—Coastal Redwood Belt
  • Non-MLRA Soil Survey Area: CA637—San Mateo Area, California

    • PEDON

  • Describers Name: Ralph E. Nelson
  • Current Taxonomic Class: Coarse-loamy, mixed, mesic Typic Haploxerolls
  • Current Taxon Kind: taxadjunct
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 10
  • Correlated Information:
  • Soil Name - Sweeney
  • PSC - 25 to 100 cm.
  • Classificaton Date - 7/23/2007
  • Moisture Class - xeric
  • Sampled As Information:
  • Soil Name - Sweeney
  • Classificaton Date - 5/17/1955
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: hills
  • Landform: mountain
  • Drainage Class: moderately well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/17/1955 (actual site observation date)
  • 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

    AVFA

    LUPIN

    Avena fatua

    Lupinus

    wild oat

    lupine

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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

    25

    —

    —

    640

    —

    135

    940

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    A1—0 to 18 centimeters (0.0 to 7.1 inches); dark grayish brown (10YR 4/2), very dark brown (10YR 2/2), moist; silty clay loam; moderate fine and medium granular structure; hard when dry, friable, nonsticky, slightly plastic; 21.0 roots; 21 percent worm casts; fragments; neutral, pH 7.0, unspecified; clear smooth boundary. Lab sample # 40A23882. krotovinas
    B2—18 to 41 centimeters (7.1 to 16.1 inches); dark grayish brown (10YR 4/2), very dark brown (10YR 2/2), moist; silty clay loam; weak fine and medium subangular blocky structure; hard when dry, firm, nonsticky, slightly plastic; 21.0 roots; clay films on vertical faces of peds; 3 percent worm casts; fragments; neutral, pH 7.0, unspecified; clear wavy boundary. Lab sample # 40A23883. krotovinas; continuous - phpvsfiid 196498; continuous - phpvsfiid 196498
    B3—41 to 56 centimeters (16.1 to 22.0 inches); brown (10YR 4/3) and dark grayish brown (10YR 4/2), dark brown (10YR 3/3) and very dark grayish brown (10YR 3/2), moist; clay loam; weak fine and medium subangular blocky structure; hard when dry, firm, slightly sticky, slightly plastic; 3.0 roots; clay films on vertical faces of peds; fragments; neutral, pH 7.0, unspecified; clear boundary. Lab sample # 40A23884. Some roots and numerous krotovinas. The lower boundary is clear and varies from wavy to tonguelike, due to krotovina action.; patchy - phpvsfiid 196499; patchy - phpvsfiid 196499
    C1—56 to 84 centimeters (22.0 to 33.1 inches); yellowish brown (10YR 5/4) and dark brown (10YR 3/3), dark yellowish brown (10YR 4/4) and very dark brown (10YR 2/2), moist; clay loam; weak fine and medium subangular blocky structure; very hard, firm, slightly sticky, slightly plastic; 0.5 roots; clay films on vertical faces of peds; iron-manganese concretions; fragments; neutral, pH 7.0, unspecified; gradual wavy boundary. Lab sample # 40A23885. patchy - phpvsfiid 186739; patchy - phpvsfiid 186739
    C2—84 to 114 centimeters (33.1 to 44.9 inches); yellowish brown (10YR 5/4) and dark brown (10YR 3/3) and pale yellow (2.5Y 7/4), yellowish brown (10YR 5/4) and very dark grayish brown (10YR 3/2), moist; loam; massive, and weak subangular blocky; very hard, firm, nonsticky, nonplastic; iron-manganese concretions; fragments; neutral, pH 7.0, unspecified; gradual wavy boundary. Lab sample # 40A23886
    C3—114 to 145 centimeters (44.9 to 57.1 inches); yellowish brown (10YR 5/4) and dark brown (10YR 3/3) and pale yellow (2.5Y 7/4), yellowish brown (10YR 5/4) and very dark grayish brown (10YR 3/2), moist; loam; massive; very hard, firm, nonsticky, nonplastic; fragments; neutral, pH 7.0, unspecified; gradual wavy boundary. Lab sample # 40A23887
    C4—145 to 165 centimeters (57.1 to 65.0 inches); yellowish brown (10YR 5/4) and dark brown (10YR 3/3) and pale yellow (2.5Y 7/4), yellowish brown (10YR 5/4) and very dark grayish brown (10YR 3/2), moist; loam; massive; fragments. Lab sample # 40A23888. This material grades gradually with depth into the hard diabase bedrock.