IDENTIFIERS

  • Current Taxon Name (Soil Name): Dodson
  • OSD
  • Series Extent
  • User Site ID: S2001OK055003
  • User Pedon ID: S2001OK055003
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - KSSL
  • Lab Pedon # - 01N1045
  • NCSS Pedon Lab Data NASIS Record ID - 14377
  • User Project ID: ALT_FY19_Eval_Dodson_L_0_1
  • Project Name: MLRA 78B - Dodson loam, 0 to 1 percent slopes
  • Print Date: 12/10/2025

    • 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: 35.0314806
  • Std. Longitude: -99.5019306
  • Datum: WGS84
  • Township: 7N
  • Range: 22W
  • Section: 34
  • PLSS Details: 610 feet north and 300 feet west of southeast corner
  • Location Description: Greer County, Oklahoma; From the intersection of Highways 283/34 and 9 in Mangum; Go 9 miles North. about 610 feet north and 300 feet west of southeast corner of Section 34, Township 7 north, Range 22 west.
  • Map Unit: RakA—Roark loam, 0 to 1 percent slopes
  • Country: US—United States
  • State: Oklahoma
  • County: OK055—Greer
  • MLRA: 78C—Central Rolling Red Plains, Eastern Part
  • Regional Office: SC—South Central
  • MLRA Soil Survey Area: SC-ALT—Altus, Oklahoma
  • Non-MLRA Soil Survey Area: OK055—Greer County, Oklahoma
  • 7.5 Minute USGS Quad: 35099-A5—Willow, Oklahoma

    • PEDON

  • Describers Name: RJM, CDS, RFG, SDA, GFS, SCH, CRC, DDR, CLN
  • Current Taxonomic Class: Fine, smectitic, thermic Pachic Argiustolls
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: NASIS
  • Pedon #: 3
  • Correlated Information:
  • Soil Name - Dodson
  • PSC - 39 to 89 cm.
  • Classificaton Date - 8/14/2019
  • Classifier - Richard Gelnar
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - ustic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - roark
  • Classificaton Date - 6/26/2001
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: level 1


    • SITE

  • Parent Material: loamy alluvium
  • Landscape: plains
  • Landform: paleoterrace
  • Geomorphic Component Terraces: tread
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/26/2001 (actual site observation date)
  • Data Collector: RJM, CDS, RFG, SDA, GFS, SCH, CRC, DDR, CLN
  • Air Photo ID: G3
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - close-grown crop
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    argillic horizon

    secondary carbonates

    0—83

    39—240

    153—265

    —83—

    —201—

    —112—
    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

    0.5

    —

    —

    527

    —

    90

    635

    —

    210

    16.1

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap1—0 to 25 centimeters (0.0 to 9.8 inches); brown (7.5YR 5/2) crushed, dark brown (7.5YR 3/2) crushed, moist; loam; weak coarse subangular blocky parts to weak fine granular, and weak medium subangular blocky parts to weak fine granular structure; hard, friable; 0.5 very fine roots throughout and 0.5 fine roots throughout; fragments; noneffervescent, by hcl, 1n; moderately acid, pH 5.8; abrupt smooth boundary. Lab sample # 01N05312; observed in pit, small
    Ap2—25 to 39 centimeters (9.8 to 15.4 inches); dark reddish brown (5YR 3/2) interior, dark reddish brown (5YR 2.5/2) interior, moist; loam; moderate medium platy parts to moderate fine subangular blocky structure; hard, firm; 0.5 very fine roots throughout and 0.5 fine roots throughout; fragments; noneffervescent, by hcl, 1n; slightly acid, pH 6.5; clear smooth boundary. Lab sample # 01N05313; observed in pit, small
    Bt1—39 to 54 centimeters (15.4 to 21.3 inches); brown (7.5YR 4/2) interior, dark brown (7.5YR 3/2) interior, moist; clay loam; weak medium prismatic parts to moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, firm; 0.5 very fine roots throughout and 0.5 fine roots throughout; fragments; noneffervescent, by hcl, 1n; neutral, pH 6.8; clear smooth boundary. Lab sample # 01N05314; observed in pit, small
    Bt2—54 to 83 centimeters (21.3 to 32.7 inches); brown (7.5YR 4/3) interior, dark brown (7.5YR 3/2) interior, moist; clay loam; strong fine prismatic parts to strong fine angular blocky, and strong medium prismatic parts to strong fine angular blocky structure; very hard, firm; 2.0 very fine roots throughout and 2.0 fine roots throughout; fragments; noneffervescent, by hcl, 1n; neutral, pH 7.0; gradual smooth boundary. Lab sample # 01N05315; observed in pit, small
    Bt3—83 to 113 centimeters (32.7 to 44.5 inches); yellowish red (5YR 5/6) interior, reddish brown (5YR 4/4) interior, moist; clay loam; strong fine prismatic parts to strong fine angular blocky, and strong medium prismatic parts to strong fine angular blocky structure; very hard, firm; 2.0 very fine roots throughout and 2.0 fine roots throughout; fragments; noneffervescent, by hcl, 1n; neutral, pH 7.0; gradual smooth boundary. Lab sample # 01N05316; observed in pit, small
    Bt4—113 to 153 centimeters (44.5 to 60.2 inches); yellowish red (5YR 5/6) interior, reddish brown (5YR 4/4) interior, moist; clay loam; moderate medium prismatic parts to moderate medium subangular blocky, and moderate medium prismatic parts to moderate fine subangular blocky structure; very hard, firm; 0.5 very fine roots throughout and 0.5 fine roots throughout; fragments; noneffervescent, by hcl, 1n; neutral, pH 7.2; clear wavy boundary. Lab sample # 01N05317; observed in pit, small
    2Btk1—153 to 177 centimeters (60.2 to 69.7 inches); 65 percent light reddish brown (5YR 6/4) interior and 35 percent reddish brown (5YR 5/4) interior, 65 percent reddish brown (5YR 5/4) interior and 35 percent reddish brown (5YR 4/4) interior, moist; clay loam; moderate medium prismatic parts to moderate fine subangular blocky, and moderate medium subangular blocky structure; very hard, firm; 0.1 very fine roots throughout and 0.1 fine roots throughout; 3 percent fine carbonate masses and 2 percent medium carbonate masses; fragments; noneffervescent, by hcl, 1n; moderately alkaline, pH 8.0; gradual wavy boundary. Lab sample # 01N05318; observed in pit, small
    2Btk2—177 to 211 centimeters (69.7 to 83.1 inches); 50 percent yellowish red (5YR 5/6) interior and 50 percent reddish brown (5YR 5/4) interior, 50 percent yellowish red (5YR 4/6) interior and 50 percent reddish brown (5YR 4/4) interior, moist; clay loam; weak medium prismatic parts to moderate fine subangular blocky, and moderate medium subangular blocky structure; very hard, firm; 8 percent fine carbonate masses and 7 percent medium carbonate masses; fragments; slight effervescence, by hcl, 1n; moderately alkaline, pH 8.0; gradual wavy boundary. Lab sample # 01N05319; observed in pit, small
    2Btk3—211 to 240 centimeters (83.1 to 94.5 inches); brown (7.5YR 5/3) interior, brown (7.5YR 4/3) interior, moist; silty clay loam; weak medium prismatic parts to moderate fine subangular blocky, and moderate medium subangular blocky structure; very hard, firm; 10 percent carbonate masses in matrix; fragments; slight effervescence, by hcl, 1n; moderately alkaline, pH 8.0; clear wavy boundary. Lab sample # 01N05320; observed in pit, small
    2Bk—240 to 265 centimeters (94.5 to 104.3 inches); reddish yellow (7.5YR 6/6) interior, strong brown (7.5YR 4/6) interior, moist; silty clay loam; moderate medium subangular blocky, and moderate fine subangular blocky structure; hard, friable; 20 percent carbonate masses in matrix; fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.2. Lab sample # 01N05321; observed in pit, small