IDENTIFIERS

  • Current Taxon Name (Soil Name): Ajo
  • OSD
  • Series Extent
  • User Site ID: S1971AZ019011
  • User Pedon ID: S1971AZ019011
  • Vegetation Plot ID: S1971AZ019011
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 71C0012
  • NCSS Pedon Lab Data NASIS Record ID - 13232
  • Print Date: 11/23/2024

    • 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: 32.0797234
  • Std. Longitude: -112.7480545
  • Datum: WGS84
  • Township: 15S
  • Range: 5W
  • Section: 35
  • PLSS Details: NW1/4 of SE1/4
  • Location Description: (projected) on Alamo Canyon Road, Organ Pipe Cactus National Monument.
  • State: Arizona
  • County: AZ019—Pima
  • Non-MLRA Soil Survey Area: AZ648—Cabeza Prieta Area, Arizona, Parts of Pima and Yuma Counties

    • PEDON

  • Describers Name: Y. H. Havens, E. Chamberlin
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 11
  • Sampled As Information:
  • Soil Name - Ajo
  • Taxonomic Class - Clayey-skeletal, mixed Petrocalcic Paleargids
  • PSC - 5 to 55 cm.
  • Classificaton Date - 4/8/1971
  • Moisture Class - aridic (torric)
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Slope Shape Down: convex
  • Drainage Class: well
  • Surface Fragments: 65.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/8/1971 (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
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    CAGI7

    PARKI2

    PARKI2

    Carnegia gigantea

    Parkinsonia

    Parkinsonia

    saguaro

    paloverde

    paloverde

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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

    2

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    671

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    254

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    20.6

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    A1—0 to 5 centimeters (0.0 to 2.0 inches); brown (7.5YR 5/4), brown (7.5YR 4/4), moist; very gravelly loam; weak medium platy structure; slightly hard, friable, slightly sticky, moderately plastic; 3.0 very fine roots; 3.0 very fine vesicular and 0.5 fine tubular pores; 55 percent by volume 2-39-75 millimeter unspecified fragments; noneffervescent; moderately alkaline, pH 8.0, thymol-blue; abrupt wavy boundary. Lab sample # 71C00068; dry when described;
    B21T—5 to 15 centimeters (2.0 to 5.9 inches); reddish brown (5YR 4/4), dark reddish brown (5YR 3/4), moist; very gravelly clay loam; weak fine and medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; 3.0 very fine and fine roots and 0.5 medium roots; 3.0 very fine interstitial pores; 10 percent clay films on faces of peds and in pores; 60 percent by volume 2-39-75 millimeter unspecified fragments; noneffervescent; moderately alkaline, pH 8.0, thymol-blue; clear wavy boundary. Lab sample # 71C00069; dry when described;
    B22T—15 to 33 centimeters (5.9 to 13.0 inches); yellowish red (5YR 4/6), yellowish red (5YR 4/6), moist; very gravelly clay loam; weak fine and medium subangular blocky structure; hard when dry, friable, moderately sticky, moderately plastic; 21.0 very fine to medium roots; 0.5 very fine tubular and 3.0 very fine interstitial pores; 10 percent clay films on faces of peds and in pores; 65 percent by volume 2-39-75 millimeter unspecified fragments; noneffervescent; moderately alkaline, pH 8.2, thymol-blue; clear wavy boundary. Lab sample # 71C00070; dry when described;
    B3CA—33 to 61 centimeters (13.0 to 24.0 inches); yellowish red (5YR 5/6), yellowish red (5YR 4/6), moist; very gravelly clay loam; massive; hard when dry, friable, moderately sticky, moderately plastic; 3.0 very fine and fine roots; 0.5 very fine tubular and 3.0 very fine interstitial pores; 1 percent pinkish white (7.5YR 8/2) carbonate coats on rock fragments and 10 percent clay films in root channels and/or pores; 70 percent by volume 2-39-75 millimeter unspecified fragments; strong effervescence; moderately alkaline, pH 8.2, thymol-blue; clear wavy boundary. Lab sample # 71C00071; dry when described;
    CCAM—61 to 91 centimeters (24.0 to 35.8 inches); white (10YR 8/1) and pink (7.5YR 7/4), pinkish gray (7.5YR 7/2) and light brown (7.5YR 6/4), moist; massive; fragments; violent effervescence; moderately alkaline, pH 8.3, thymol-blue. Lab sample # 71C00072; dry when described;