IDENTIFIERS

  • Current Taxon Name (Soil Name): RED HILL
  • OSD
  • Series Extent
  • User Site ID: S1972CA055006
  • User Pedon ID: S1972CA055006
  • Vegetation Plot ID: S1972CA055006
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 72C0148
  • NCSS Pedon Lab Data NASIS Record ID - 44082
  • Print Date: 11/21/2024

    • 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: 38.5955544
  • Std. Longitude: -122.4430542
  • Datum: WGS84
  • Township: 9N
  • Range: 5W
  • Section: 31
  • PLSS Details: NE 1/4, SE 1/4
  • Location Description: Napa County, California. A pit located 2,000 feet north of White Cottage Road from Howell Mountain School and 700 feet from White Cottage Road.
  • State: California
  • County: CA055—Napa
  • MLRA: 15—Central California Coast Range
  • Non-MLRA Soil Survey Area: CA055—Napa County, California

    • PEDON

  • Describers Name: J. Kashiwagi, Leo C. Klameth
  • Current Taxonomic Class: Fine-loamy, mixed, mesic Ultic Argixerolls
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 6
  • Correlated Information:
  • Soil Name - RED HILL
  • PSC - 38 to 88 cm.
  • Classificaton Date - 5/11/2005
  • Moisture Class - xeric
  • Sampled As Information:
  • Soil Name - Red Hill
  • Classificaton Date - 11/16/1972
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: basic volcanic breccia
  • Landscape: moderately sloping upland
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/16/1972 (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

    ARCTO3

    PERSE

    QUBE5

    QUKE

    TODI

    VICIA

    Arctostaphylos

    Persea

    Quercus berberidifolia

    Quercus kelloggii

    Toxicodendron diversilobum

    Vicia

    manzanita

    bay

    scrub oak

    California black oak

    Pacific poison oak

    vetch

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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

    5

    —

    —

    493.8

    —

    45

    1016

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    14

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    A11—0 to 10 centimeters (0.0 to 3.9 inches); dark reddish brown (5YR 3/4), dark reddish brown (5YR 3/2), moist; loam; moderate fine subangular blocky, and weak medium subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; 21.0 very fine roots and 3.0 medium roots and 21.0 fine roots; 21.0 very fine tubular and 3.0 medium tubular and 3.0 medium interstitial and 21.0 fine tubular pores; fragments; slightly acid, pH 6.5; clear smooth boundary. Lab sample # 72C00904; observed in pit, small
    A12—10 to 38 centimeters (3.9 to 15.0 inches); dark reddish brown (5YR 3/4), dark reddish brown (5YR 3/3), moist; loam; weak medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; 21.0 very fine roots and 21.0 medium roots and 21.0 fine roots and 3.0 coarse roots; 3.0 very fine interstitial and 3.0 very fine tubular pores; fragments; slightly acid, pH 6.2; gradual irregular boundary. Lab sample # 72C00905; observed in pit, small
    Bt21—38 to 71 centimeters (15.0 to 28.0 inches); reddish brown (5YR 4/4), dark reddish brown (5YR 3/4), moist; clay loam; moderate medium subangular blocky structure; slightly hard, friable, slightly plastic; 21.0 medium roots and 0.5 fine roots and 21.0 coarse roots; 21.0 fine tubular pores; 30 percent clay films on all faces of peds and 30 percent clay films on surfaces along pores; fragments; moderately acid, pH 6.0; clear smooth boundary. Lab sample # 72C00906; observed in pit, small
    B22T—71 to 104 centimeters (28.0 to 40.9 inches); strong brown (7.5YR 5/6), strong brown (7.5YR 5/8), moist; gravelly clay loam; massive; slightly hard, friable, slightly sticky, slightly plastic; 21.0 medium roots; 3.0 medium tubular and 3.0 fine tubular pores; 30 percent clay films on all faces of peds and 30 percent clay bridges between sand grains and 30 percent clay films on surfaces along pores; fragments; moderately acid, pH 6.0; gradual smooth boundary. Lab sample # 72C00907; observed in pit, small
    Bt3—104 to 142 centimeters (40.9 to 55.9 inches); strong brown (7.5YR 5/6), brown (7.5YR 4/4), moist; gravelly clay loam; massive; slightly hard, friable, slightly sticky, slightly plastic; 21.0 medium roots and 0.5 coarse roots; 3.0 fine tubular pores; 30 percent clay films on all faces of peds and 30 percent clay films on surfaces along pores and 30 percent clay bridges between sand grains; fragments; moderately acid, pH 5.7; abrupt wavy boundary. Lab sample # 72C00908; observed in pit, small
    R—142 to 152 centimeters (55.9 to 59.8 inches); bedrock; fragments. Lab sample # 72C00909; observed in pit, small