IDENTIFIERS

  • Current Taxon Name (Soil Name): Usal
  • OSD
  • Series Extent
  • User Site ID: S2011CA087005
  • User Pedon ID: S11CA087005
  • Vegetation Plot ID: S2011CA087005
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 12N7842
  • NCSS Pedon Lab Data NASIS Record ID - 47549
  • Print Date: 11/24/2024

    • 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: 37.0779722
  • Std. Longitude: -122.2019444
  • Datum: WGS84
  • Location Description: Site is in Swanton Pacific Ranch, about 570 feet north of Landing 20; approximately 9 miles north of Santa Cruz, CA, in MLRA 4B-7.
  • State: California
  • County: CA087—Santa Cruz
  • MLRA: 4B—Coastal Redwood Belt
  • Regional Office: SW—Southwest
  • MLRA Soil Survey Area: SW-TEM—Templeton, California
  • Non-MLRA Soil Survey Area: CA087—Santa Cruz County, California

    • PEDON

  • Describers Name: PDS, BAH, RDT
  • Current Taxonomic Class: Fine-loamy, mixed, superactive, isomesic Typic Argiudolls
  • Current Taxon Kind: family
  • Pedon Type: not classified to current taxon name
  • Pedon Purpose: research site
  • Pedon Record Orgin: PedonPC
  • Sampled As Information:
  • Soil Name - Usal
  • Taxonomic Class - Fine-loamy, mixed, superactive, isomesic Typic Argiudolls
  • PSC - 48 to 92 cm.
  • Classificaton Date - 11/2/2011
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - udic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: moderately weathered, colluvium derived from mudstone over colluvium derived from granite
  • Landscape: mountains
  • Landform: landslide
  • Hill Slope Profile: backslope
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: very high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Mesozoic Granitic formation.
  • Surface Fragments: 10.00 percent flat angular mudstone,
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/2/2011 (actual site observation date)
  • Plant Association Name: Coastal redwood forest
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - sunny
  • Current Air Temp - 52
  • Site Erosion Accelerated: water erosion sheet
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    LIDE3

    MATO3

    OXOR

    PETR7

    SEQUO

    Lithocarpus densiflorus

    Macrothelypteris torresiana

    Oxalis oregana

    Pentagramma triangularis

    Sequoia

    tanoak

    swordfern

    redwood-sorrel

    goldback fern

    redwood

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    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    argillic horizon

    2—28

    48—92

    —-

    —-
    Site Soil Temperature
    Site Obs. Date Depth Sensor Kind Temperature
    cm C

    11/2/2011

    50

    —

    13
    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

    50

    —

    —

    279

    —

    104

    890

    —

    250

    12

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    —

    —

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    SPR5

    SPR5-Landing20

    SM/ST
    Oi—0 to 2 centimeters (0.0 to 0.8 inches); slightly decomposed plant material; fragments; abrupt smooth boundary. Lab sample # 12N02132; observed in pit, small
    A1—2 to 3 centimeters (0.8 to 1.2 inches); black (10YR 2/1), black (10YR 2/1), dry; loam; 45 percent sand; 35 percent silt; 20 percent clay; weak very fine granular structure; soft, very friable, nonsticky, nonplastic; 0.7 fine roots throughout; 3 percent by volume 2-?-5 millimeter charcoal fragments and 10 percent by volume flat subangular 2-?-5 millimeter mudstone fragments; slightly alkaline, pH 7.5, pH meter; abrupt smooth boundary.; observed in pit, small
    A2—3 to 8 centimeters (1.2 to 3.1 inches); black (10YR 2/1), dark grayish brown (10YR 4/2), dry; loam; 45 percent sand; 35 percent silt; 20 percent clay; moderate medium subangular blocky, and weak fine granular structure; soft, very friable, nonsticky, slightly plastic; 0.1 very fine roots throughout and 2.0 medium roots throughout and 0.2 fine roots throughout; 2.0 medium tubular and 2.0 fine dendritic tubular pores; 2 percent fine mica flakes, unspecified throughout; 1 percent by volume 2-?-5 millimeter charcoal fragments and 2 percent by volume flat angular 2-?-5 millimeter mudstone fragments; neutral, pH 7.1, pH meter; clear smooth boundary. Lab sample # 12N02133; observed in pit, small
    A3—8 to 28 centimeters (3.1 to 11.0 inches); very dark brown (10YR 2/2), dark grayish brown (10YR 4/2), dry; sandy loam; 60 percent sand; 22 percent silt; 18 percent clay; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; 0.1 very fine roots throughout and 1.0 medium roots throughout and 0.2 fine roots throughout and 1.0 coarse roots throughout; 2.0 medium tubular and 3.0 fine dendritic tubular pores; 2 percent fine mica flakes, unspecified throughout; 1 percent by volume 2-?-5 millimeter charcoal fragments and 2 percent by volume flat angular 2-?-5 millimeter mudstone fragments; neutral, pH 6.9, pH meter; clear wavy boundary. Lab sample # 12N02134; observed in pit, small
    B/A—28 to 48 centimeters (11.0 to 18.9 inches); 90 percent very dark grayish brown (10YR 3/2) and 10 percent brown (10YR 4/3), light brownish gray (10YR 6/2), dry; sandy loam; 65 percent sand; 17 percent silt; 18 percent clay; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; 2.0 very coarse roots throughout and 2.0 medium roots throughout and 2.0 fine roots throughout; 6.0 medium tubular and 2.0 fine dendritic tubular and 1.0 coarse tubular pores; 5 percent fine mica flakes, unspecified throughout; 1 percent by volume 2-?-5 millimeter charcoal fragments and 3 percent by volume flat angular 5-?-10 millimeter mudstone fragments and 5 percent by volume flat subangular 20-?-75 millimeter mudstone fragments; neutral, pH 6.6, pH meter; abrupt irregular boundary. Lab sample # 12N02135; observed in pit, small
    2Bt1—48 to 71 centimeters (18.9 to 28.0 inches); 60 percent yellowish brown (10YR 5/6) and 30 percent olive brown (2.5Y 4/4) and 10 percent very dark gray (10YR 3/1), 60 percent brown (10YR 5/3) and 40 percent very pale brown (10YR 7/3), dry; gravelly sandy clay loam; 55 percent sand; 15 percent silt; 30 percent clay; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, moderately plastic; 1.0 very coarse roots throughout and 0.5 medium roots throughout and 0.2 fine roots throughout and 0.5 coarse roots throughout; 2.0 fine dendritic tubular pores; 5 percent clay bridges between sand grains; 5 percent fine mica flakes, unspecified throughout; 1 percent by volume nonflat 2-?-5 millimeter charcoal fragments and 5 percent by volume flat angular 2-?-5 millimeter mudstone fragments and 10 percent by volume nonflat subrounded 2-?-5 millimeter granite fragments; 10 percent krotovinas (volume percent); slightly acid, pH 6.2, pH meter; gradual wavy boundary. Lab sample # 12N02136; observed in pit, small
    2Bt2—71 to 92 centimeters (28.0 to 36.2 inches); 80 percent dark yellowish brown (10YR 4/4) and 15 percent yellowish brown (10YR 5/6) and 5 percent very dark grayish brown (10YR 3/2), pale brown (10YR 6/3), dry; clay loam; 32 percent clay; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, moderately plastic; 0.1 fine roots throughout and 0.3 coarse roots throughout; 3.0 fine dendritic tubular pores; 5 percent clay bridges between sand grains; 5 percent fine mica flakes, unspecified throughout; 1 percent by volume 2-?-5 millimeter charcoal fragments and 2 percent by volume flat angular 2-?-20 millimeter mudstone fragments and 10 percent by volume nonflat subrounded 2-?-5 millimeter granite fragments; 10 percent krotovinas (volume percent); strongly acid, pH 5.5, pH meter; clear wavy boundary. Lab sample # 12N02137; observed in pit, small
    2C—92 to 160 centimeters (36.2 to 63.0 inches); 95 percent yellowish brown (10YR 5/4) and 3 percent light gray (10YR 7/2) and 1 percent red (2.5YR 4/8) and 1 percent very dark brown (10YR 2/2), very pale brown (10YR 7/4), dry; gravelly sandy clay loam; 50 percent sand; 25 percent silt; 25 percent clay; structureless massive; soft, very friable, slightly sticky, slightly plastic; 1.0 medium roots throughout; 5 percent fine mica flakes, unspecified throughout; 1 percent by volume nonflat subrounded 75-?-150 millimeter granite fragments and 10 percent by volume nonflat subrounded 2-?-5 millimeter granite fragments and 10 percent by volume nonflat subrounded 5-?-20 millimeter granite fragments; moderately acid, pH 5.6, pH meter. Lab sample # 12N02138; observed in pit, small