IDENTIFIERS

  • Current Taxon Name (Soil Name): Forrest
  • OSD
  • Series Extent
  • User Site ID: S1991AZ003005
  • User Pedon ID: 91AZ003005
  • Vegetation Plot ID: S1991AZ003005
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 92P0264
  • NCSS Pedon Lab Data NASIS Record ID - 64503
  • 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: 31.7377777
  • Std. Longitude: -109.9494476
  • Datum: WGS84
  • Township: 19S
  • Range: 23E
  • Section: 36
  • Location Description: Tombstone, Arizona.
  • State: Arizona
  • County: AZ003—Cochise
  • Non-MLRA Soil Survey Area: AZ671—Cochise County, Arizona, Douglas-Tombstone Part
  • 7.5 Minute USGS Quad: 31109-F8—Hay Mountain, Arizona
  • PEDON

  • Describers Name: Lloyd Law, Jr. and Christopher C. Cochran
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 5
  • Sampled As Information:
  • Soil Name - Forrest
  • Taxonomic Class - Fine, mixed Ustollic Haplargids
  • PSC - 4 to 54 cm.
  • Classificaton Date - 11/19/1991
  • Moisture Class - aridic (torric)
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


  • SITE

  • Landscape: upland
  • Landform: fluvial terrace
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: on a slope
  • Slope Shape Across: concave
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments: 43.00 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

    BOCU

    BOER4

    CAER

    Bouteloua curtipendula

    Bouteloua eriopoda

    Calliandra eriophylla

    sideoats grama

    black grama

    fairyduster

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

    ochric epipedon

    argillic horizon

    calcic horizon

    0—5

    5—61

    61—152

    —-

    —-

    —-

    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

    9

    518

    91.4

    1536

    290

    305

    16.1

    13.9

    A—0 to 5 centimeters (0.0 to 2.0 inches); 90 percent dark yellowish brown (10YR 4/4) exterior, 90 percent dark brown (10YR 3/3) exterior, moist; very gravelly sandy loam; moderate medium and coarse platy structure; soft, friable, slightly sticky, slightly plastic; 3.0 fine roots top of horizon; 3.0 very fine and fine vesicular pores; 35 percent by volume subangular 75-162-250 millimeter limestone-sandstone-shale fragments; very slight effervescence, by hcl, 1n; neutral, pH 7.0, pH meter; abrupt smooth boundary. Lab sample # 92P01737; dry when described;
    Bt1—5 to 10 centimeters (2.0 to 3.9 inches); 90 percent very dark grayish brown (10YR 3/2) exterior, 90 percent very dark brown (10YR 2/2) exterior, moist; clay loam; moderate subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 3.0 fine roots; 3.0 very fine and fine vesicular and tubular pores; fragments; very slight effervescence, by hcl, 1n; slightly alkaline, pH 7.5, pH meter; clear smooth boundary. Lab sample # 92P01738; dry when described;
    Bt2—10 to 15 centimeters (3.9 to 5.9 inches); 90 percent dark reddish brown (5YR 3/3) exterior, 90 percent dark reddish brown (5YR 3/2) exterior, moist; clay; strong fine subangular blocky structure; hard, firm, very sticky, very plastic; 3.0 fine roots throughout; 3.0 fine tubular pores; fragments; very slight effervescence, by hcl, 1n; slightly alkaline, pH 7.5, pH meter; clear smooth boundary. Lab sample # 92P01739; dry when described;
    Bt3—15 to 36 centimeters (5.9 to 14.2 inches); 90 percent dark yellowish brown (10YR 4/4) exterior, 90 percent dark reddish brown (2.5YR 3/3) exterior, moist; clay; strong fine subangular blocky structure; hard, firm, very sticky, very plastic; 3.0 fine roots throughout; 3.0 fine tubular pores; fragments; slight effervescence, by hcl, 1n; slightly alkaline, pH 7.5, pH meter; clear smooth boundary. Lab sample # 92P01740; dry when described;
    Bt4—36 to 61 centimeters (14.2 to 24.0 inches); 90 percent dark reddish brown (5YR 3/4) exterior, 90 percent dark reddish brown (5YR 3/3) exterior, moist; clay; moderate medium prismatic structure; hard, firm, very sticky, very plastic; 3.0 fine roots throughout; 3.0 fine tubular pores; fragments; slight effervescence, by hcl, 1n; slightly alkaline, pH 7.5, pH meter; abrupt smooth boundary. Lab sample # 92P01741; dry when described;
    2Ck—61 to 152 centimeters (24.0 to 59.8 inches); 85 percent white (10YR 8/1) exterior and 10 percent light brownish gray (10YR 6/2) exterior and 5 percent gray (10YR 6/1) exterior, 80 percent brown (7.5YR 5/4) exterior and 15 percent light brown (7.5YR 6/3) exterior and 5 percent light brownish gray (10YR 6/2) exterior, moist; cobbly sandy loam; massive; soft, friable by carbonates, slightly sticky, nonplastic; 3.0 fine roots between peds; 3.0 fine interstitial pores; fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH meter. Lab sample # 92P01742; dry when described;