IDENTIFIERS

  • Current Taxon Name (Soil Name): Swisshelm
  • OSD
  • Series Extent
  • User Site ID: S1991AZ003007
  • User Pedon ID: 91AZ003007
  • Vegetation Plot ID: S1991AZ003007
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 92P0266
  • NCSS Pedon Lab Data NASIS Record ID - 64505
  • Print Date: 2/16/2025

    • 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: 31.7083340
  • Std. Longitude: -110.0344467
  • Datum: WGS84
  • Township: 20S
  • Range: 23E
  • Section: 7
  • Location Description: Tombstone, Arizona.
  • State: Arizona
  • County: AZ003—Cochise
  • MLRA: 41—Madrean Archipelago
  • Non-MLRA Soil Survey Area: AZ671—Cochise County, Arizona, Douglas-Tombstone Part
  • 7.5 Minute USGS Quad: 31110-F1—Tombstone, Arizona

    • PEDON

  • Describers Name: Lloyd Law, Jr. and Christopher C. Cochran
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 7
  • Sampled As Information:
  • Soil Name - Swisshelm
  • Taxonomic Class - Coarse-loamy, mixed Fluventic Camborthids
  • PSC - 64 to 114 cm.
  • Classificaton Date - 11/19/1991
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: upland
  • Landform: fluvial terrace
  • Geomorphic Component Hills: head slope
  • Hill Slope Profile: shoulder
  • Slope Position: on a slope
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments: 5.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/19/1991 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - rangeland, grassland
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    AGSM

    BOER4

    FLCE

    LADI2

    Agropyron smithii

    Bouteloua eriopoda

    Flourensia cernua

    Larrea divaricata

    —

    black grama

    American tarwort

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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

    cambic horizon

    5—23

    —-
    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

    1

    122

    457.2

    1391

    —

    234

    305

    —

    —

    16.1

    —

    —

    13.9

    —

    —

    —

    —

    —

    —

    —
    A1—0 to 3 centimeters (0.0 to 1.2 inches); 90 percent brown (10YR 5/3) crushed, 90 percent dark yellowish brown (10YR 3/4) crushed, moist; sandy loam; weak thin platy structure; soft, friable, nonsticky, nonplastic; 3.0 very fine and fine roots top of horizon and 3.0 medium roots top of horizon; 3.0 very fine and fine vesicular pores; fragments; very slight effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; abrupt smooth boundary. Lab sample # 92P01748; dry when described;
    A2—3 to 5 centimeters (1.2 to 2.0 inches); 90 percent brown (7.5YR 5/4) crushed, 90 percent dark yellowish brown (10YR 3/4) crushed, moist; sandy loam; weak fine granular structure; soft, friable, nonsticky, nonplastic; 3.0 very fine and fine roots top of horizon and 3.0 medium roots top of horizon; 3.0 very fine and fine vesicular and 21.0 interstitial pores; fragments; very slight effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; abrupt smooth boundary. Lab sample # 92P01749; dry when described;
    A3—5 to 15 centimeters (2.0 to 5.9 inches); 90 percent brown (7.5YR 5/4) crushed, 90 percent dark yellowish brown (10YR 3/6) crushed, moist; sandy loam; weak medium granular structure; soft, friable, slightly sticky, nonplastic; 3.0 fine roots throughout; 3.0 very fine and fine interstitial and tubular pores; fragments; very slight effervescence, by hcl, 1n; moderately alkaline, pH 8.3, pH meter; abrupt smooth boundary. Lab sample # 92P01750; dry when described;
    A4—15 to 64 centimeters (5.9 to 25.2 inches); 90 percent yellowish brown (10YR 5/4) crushed, 90 percent dark yellowish brown (10YR 3/4) crushed, moist; sandy loam; weak fine subangular blocky structure; soft, friable, slightly sticky, nonplastic; 3.0 fine roots throughout; 3.0 fine interstitial and tubular pores; fragments; very slight effervescence, by hcl, 1n; moderately alkaline, pH 8.3, pH meter; abrupt wavy boundary. Lab sample # 92P01751; dry when described;
    2Btb—64 to 102 centimeters (25.2 to 40.2 inches); 90 percent strong brown (7.5YR 5/6) crushed, 90 percent strong brown (7.5YR 4/6) crushed, moist; sandy clay loam; moderate medium subangular blocky structure; slightly hard, firm, slightly sticky, slightly plastic; 3.0 fine roots throughout; 3.0 medium interstitial and tubular pores; 50 percent medium and coarse platy iron-manganese concretions; fragments; very slight effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; clear wavy boundary. Lab sample # 92P01752; dry when described;
    2Btkb1—102 to 130 centimeters (40.2 to 51.2 inches); 90 percent brown (7.5YR 5/4) crushed, 90 percent brown (7.5YR 4/4) crushed, moist; very gravelly sandy loam; weak fine subangular blocky structure; slightly hard, firm, slightly sticky, slightly plastic; 3.0 fine roots throughout; 3.0 medium interstitial and tubular pores; fragments; very slight effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; gradual wavy boundary. Lab sample # 92P01753; dry when described;
    2Btkb2—130 to 152 centimeters (51.2 to 59.8 inches); 90 percent brown (7.5YR 5/4) crushed, 90 percent brown (7.5YR 4/4) crushed, moist; sandy loam; weak medium subangular blocky structure; hard, firm, slightly sticky, slightly plastic; 3.0 fine roots throughout; 3.0 medium interstitial and tubular pores; fragments; very slight effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; gradual wavy boundary. Lab sample # 92P01754; dry when described;
    2Btkb3—152 to 201 centimeters (59.8 to 79.1 inches); 90 percent brown (7.5YR 5/4) crushed, 90 percent brown (7.5YR 4/4) crushed, moist; loam; massive; slightly hard, firm, slightly sticky, slightly plastic; fragments. Lab sample # 92P01755