IDENTIFIERS

  • Current Taxon Name (Soil Name): IRMULCO
  • OSD
  • Series Extent
  • User Site ID: S1980CA045014
  • User Pedon ID: S1980CA045014
  • Vegetation Plot ID: S1980CA045014
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 80P0445
  • NCSS Pedon Lab Data NASIS Record ID - 48221
  • 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: 39.8366661
  • Std. Longitude: -123.8319473
  • Datum: WGS84
  • Township: 23N
  • Range: 18W
  • Section: 23
  • PLSS Details: 500 feet north and 500 feet west of center of NE 1/4
  • Location Description: South 3 miles on GP rd. 4000 feet from intersection with Usal Rd; uphill 200 feet on road cut face.
  • Map Unit: 172—Irmulco-Tramway complex, 9 to 30 percent slopes
  • State: California
  • County: CA045—Mendocino
  • MLRA: 4B—Coastal Redwood Belt
  • Non-MLRA Soil Survey Area: CA694—Mendocino County, Western Part, California

    • PEDON

  • Current Taxonomic Class: Clayey, smectitic, isomesic, shallow Ultic Hapludalfs
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 14
  • Correlated Information:
  • Soil Name - IRMULCO
  • PSC - 15 to 65 cm.
  • Classificaton Date - 4/8/2005
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Irmulco
  • Taxonomic Class - Fine-loamy, mixed, isomesic Ultic Tropudalf
  • Taxon Kind - series
  • Classificaton Date - 7/12/1979
  • Moisture Class - udic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: soft sandstone
  • Landform: upland slope
  • Slope Shape Across: concave
  • Runoff: medium
  • Drainage Class: well
  • Bedrock: very weakly coherent sandstone, unspecified
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/12/1979 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    C

    155

    183

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    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    C

    155

    183

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    C

    155

    183

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    55

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    Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    IRIS

    LIDE3

    OXALI

    POCA25

    PSEUD7

    RHODO

    SESE3

    Iris

    Lithocarpus densiflorus

    Oxalis

    Polystichum californicum

    Pseudotsuga

    Rhododendron

    Sequoia sempervirens

    iris

    tanoak

    woodsorrel

    California swordfern

    Douglas-fir

    rhododendron

    redwood

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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

    28

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    213

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    270

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    Oi—0 to 3 centimeters (0.0 to 1.2 inches); slightly decomposed plant material; fragments.
    A1—3 to 18 centimeters (1.2 to 7.1 inches); dark brown (10YR 3/3) and dark brown (7.5YR 3/4), pale brown (10YR 6/3), dry; loam; 20 percent clay; strong very fine and fine granular structure; slightly hard, friable, nonsticky, slightly plastic; 21.0 very fine and fine roots; 3.0 fine interstitial pores; fragments; moderately acid, pH 5.8; clear wavy boundary. Lab sample # 80P02446
    Bt21—18 to 41 centimeters (7.1 to 16.1 inches); brown (7.5YR 4/4), light brown (7.5YR 6/4), dry; clay loam; 30 percent clay; moderate fine and medium subangular blocky structure; hard, firm, slightly sticky, slightly plastic; 3.0 medium roots and 0.5 fine roots; 3.0 very fine tubular and 0.5 very fine interstitial and 0.5 fine tubular pores; 30 percent thin clay films on surfaces along pores and 30 percent thin clay films on all faces of peds; 2 percent spherical ironstone nodules; fragments; strongly acid, pH 5.5; gradual wavy boundary. Lab sample # 80P02447
    Bt22—41 to 69 centimeters (16.1 to 27.2 inches); brown (7.5YR 4/4), light brown (7.5YR 6/4), dry; clay loam; 30 percent clay; moderate fine and medium subangular blocky structure; hard, firm, slightly sticky, slightly plastic; 3.0 medium roots and 0.5 fine roots; 3.0 very fine tubular and 0.5 very fine interstitial and 0.5 fine tubular pores; 30 percent thin clay films on all faces of peds and 30 percent thin clay films on surfaces along pores; 2 percent spherical ironstone nodules; fragments; strongly acid, pH 5.5; gradual wavy boundary. Lab sample # 80P02448
    Bt23—69 to 107 centimeters (27.2 to 42.1 inches); brown (7.5YR 4/4), light brown (7.5YR 6/4), dry; clay loam; 30 percent clay; moderate fine and medium subangular blocky structure; hard, firm, slightly sticky, slightly plastic; 3.0 medium and coarse roots and 0.5 fine roots; 3.0 very fine tubular and 0.5 very fine interstitial and 0.5 fine tubular pores; 30 percent thin clay films on all faces of peds and 30 percent thin clay films on surfaces along pores; 10 percent spherical dark reddish brown (5YR 3/4), moist, ironstone nodules; fragments; very strongly acid, pH 5.0; gradual wavy boundary. Lab sample # 80P02449
    Bt24—107 to 145 centimeters (42.1 to 57.1 inches); brown (7.5YR 4/4), light brown (7.5YR 6/4) and pink (7.5YR 7/4), dry; clay loam; 35 percent clay; weak medium and coarse subangular blocky structure; hard, firm, slightly sticky, moderately plastic; 3.0 medium and coarse roots and 0.5 fine roots; 3.0 very fine tubular and 0.5 very fine interstitial pores; 30 percent thin clay films on all faces of peds and 30 percent thin clay films on surfaces along pores; 5 percent by volume very weakly coherent cemented 10-?-50 millimeter sandstone, unspecified fragments; very strongly acid, pH 4.8; gradual wavy boundary. Lab sample # 80P02450
    Bt25—145 to 158 centimeters (57.1 to 62.2 inches); dark yellowish brown (10YR 4/4) and 7.5YR 2/4 (7.5YR 2/4), light brown (7.5YR 6/4) and reddish yellow (7.5YR 6/6) and pink (7.5YR 7/4), dry; clay loam; 37 percent clay; weak medium and coarse angular blocky structure; hard, firm, moderately sticky, moderately plastic; 3.0 medium roots and 0.5 fine roots; 3.0 very fine tubular and 0.5 very fine tubular and 3.0 very fine interstitial pores; 30 percent thin clay films on surfaces along pores and 75 percent distinct clay films on all faces of peds; 10 percent by volume 30-?-50 millimeter unspecified fragments; very strongly acid, pH 4.5; gradual wavy boundary. Lab sample # 80P02451
    C—158 to 186 centimeters (62.2 to 73.2 inches); bedrock; fragments. Lab sample # 80P02452