IDENTIFIERS

  • Current Taxon Name (Soil Name): lawton
  • OSD
  • Series Extent
  • User Site ID: ok055-LwtA-lawton-1
  • User Pedon ID: s2001ok-055-006 lawton
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 01N1048
  • NCSS Pedon Lab Data NASIS Record ID - 14380
  • Print Date: 4/27/2025

    • 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: 34.9526100
  • Std. Longitude: -99.4126434
  • Datum: WGS84
  • Township: 6N
  • Range: 21W
  • Section: 34
  • PLSS Details: 1900 feet south and 300 feet east of the northwest corner
  • Location Description: From the intersection of SH 6 and SH 9 in Granite, OK; go two miles west to the northwest corner of Sec. 34.
  • Map Unit: LwtA—Lawton loam, 0 to 1 percent slopes
  • Country: US—United States
  • State: Oklahoma
  • County: OK055—Greer
  • MLRA: 82B—Wichita Mountains
  • Regional Office: SC—South Central
  • Non-MLRA Soil Survey Area: OK055—Greer County, Oklahoma
  • 7.5 Minute USGS Quad: 34099-H4—Granite, Oklahoma

    • PEDON

  • Describers Name: SDA, RFG, GFS, DDR, CRC, RJM, CDS
  • Current Taxonomic Class: Fine, mixed, superactive, thermic Pachic Argiustolls
  • Current Taxon Kind: taxadjunct
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - lawton
  • Classificaton Date - 9/10/2004
  • Soil Taxonomic Edition - eighth edition
  • Moisture Class - ustic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - lawton
  • Classificaton Date - 6/28/2001
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: clayey alluvium over gravelly alluvium derived from granite
  • Landscape: plains
  • Landform: terrace
  • Geomorphic Component Terraces: tread
  • Runoff: medium
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: shale, clayey at 342cm
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/28/2001 (actual site observation date)
  • Air Photo ID: I7
  • 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
    • 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

    —

    —

    488

    —

    180

    635

    —

    210

    16.1

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 15 centimeters (0.0 to 5.9 inches); brown (7.5YR 5/3) crushed, dark brown (7.5YR 3/2) crushed, moist; loam; weak fine granular structure; hard, friable; very fine roots and 3.0 fine roots; 2 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; moderately acid, pH 5.6, hellige-truog; abrupt smooth boundary.; observed in pit, small
    BAd—15 to 24 centimeters (5.9 to 9.4 inches); brown (7.5YR 4/3) crushed, dark brown (7.5YR 3/2) crushed, moist; clay loam; moderate medium angular blocky structure; hard, friable; very fine roots and 3.0 fine roots; 0.5 very fine pores; 10 percent faint clay films on all faces of peds; 1 percent worm casts; 2 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog; abrupt smooth boundary.; observed in pit, small
    Bt1—24 to 57 centimeters (9.4 to 22.4 inches); brown (7.5YR 5/3) interior, dark brown (7.5YR 3/2) interior, moist; clay loam; weak medium prismatic parts to moderate fine angular blocky, and fine wedge structure; hard, firm; very fine roots and 3.0 fine roots; 0.5 very fine and 0.5 fine pores; 10 percent distinct slickensides (pedogenic) and 60 percent distinct clay films on all faces of peds; 1 percent fine iron-manganese concretions; 1 percent worm casts; 4 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.7, hellige-truog; clear wavy boundary.; observed in pit, small
    Bt2—57 to 87 centimeters (22.4 to 34.3 inches); brown (7.5YR 5/3) interior, dark brown (7.5YR 3/2) interior, moist; clay loam; weak medium prismatic parts to moderate fine angular blocky, and fine wedge structure; hard, firm; very fine roots and 3.0 fine roots; 0.5 very fine and 0.5 fine pores; 10 percent distinct slickensides (pedogenic) and 60 percent distinct clay films on all faces of peds; 1 percent fine iron-manganese concretions; 1 percent worm casts; 6 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.7, hellige-truog; clear smooth boundary.; observed in pit, small
    2Bt1—87 to 107 centimeters (34.3 to 42.1 inches); reddish brown (5YR 5/4) interior, reddish brown (5YR 4/4) interior, moist; very gravelly clay loam; weak medium prismatic parts to moderate fine subangular blocky structure; hard, friable; very fine roots and 3.0 fine roots; 3.0 very fine and 0.5 fine pores; 35 percent distinct clay films on all faces of peds; 2 percent by volume 20-?-75 millimeter granite fragments and 50 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.8, hellige-truog; clear smooth boundary.; observed in pit, small
    2Bt2—107 to 144 centimeters (42.1 to 56.7 inches); yellowish red (5YR 5/6) interior, yellowish red (5YR 4/6) interior, moist; gravelly clay loam; weak medium prismatic parts to moderate fine subangular blocky structure; hard, firm; 0.5 very fine roots; 3.0 very fine and 3.0 fine pores; 35 percent distinct clay films on all faces of peds; 1 percent worm casts; 1 percent by volume 20-?-75 millimeter granite fragments and 20 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.8, hellige-truog; clear smooth boundary.; observed in pit, small
    2Bt3—144 to 178 centimeters (56.7 to 70.1 inches); yellowish red (5YR 5/6) interior, yellowish red (5YR 4/6) interior, moist; clay loam; 1 percent red (2.5YR 4/6) fine distinct mottles; moderate medium prismatic parts to moderate very fine angular blocky, and moderate fine angular blocky structure; very hard, very firm; 0.5 very fine pores; 5 percent carbonate coats on all faces of peds and 10 percent slickensides (pedogenic) and 35 percent faint clay films on all faces of peds; 1 percent fine iron-manganese concretions; 10 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.8, hellige-truog; clear smooth boundary.; observed in pit, small
    2Bt4—178 to 210 centimeters (70.1 to 82.7 inches); red (2.5YR 5/6) interior, red (2.5YR 4/6) interior, moist; clay loam; moderate medium prismatic parts to moderate fine angular blocky, and moderate very fine angular blocky structure; very hard, very firm; 0.5 very fine and 0.5 fine pores; 1 percent carbonate coats on all faces of peds and 30 percent faint clay films on all faces of peds; 8 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.8, hellige-truog; clear smooth boundary.; observed in pit, small
    2Bt5—210 to 232 centimeters (82.7 to 91.3 inches); red (2.5YR 5/8) interior, red (2.5YR 4/6) interior, moist; very gravelly clay loam; weak medium subangular blocky structure; hard, friable; 0.5 very fine and 0.5 fine pores; 5 percent carbonate coats on rock fragments and 20 percent faint clay films on all faces of peds; 1 percent by volume 20-?-75 millimeter metaquartzite fragments and 4 percent by volume 20-?-75 millimeter granite fragments and 5 percent by volume 2-?-20 millimeter metaquartzite fragments and 35 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; moderately alkaline, pH 7.9, hellige-truog; clear smooth boundary.; observed in pit, small
    2Bt6—232 to 310 centimeters (91.3 to 122.0 inches); red (2.5YR 5/6) interior, red (2.5YR 4/6) interior, moist; clay; moderate fine subangular blocky parts to moderate very fine subangular blocky structure; very hard, very firm; 3.0 very fine and 0.5 fine pores; 20 percent faint clay films on all faces of peds; 3 percent by volume 2-?-20 millimeter granite fragments; noneffervescent, by hcl, 1n; moderately alkaline, pH 7.9, hellige-truog; clear smooth boundary.; observed in pit, small
    2BC—310 to 342 centimeters (122.0 to 134.6 inches); gravelly clay; 30 percent by volume 2-?-20 millimeter granite fragments.; observed in auger, bucket
    3Cdr—342 to 350 centimeters (134.6 to 137.8 inches); bedrock; fragments.; observed in auger, bucket