IDENTIFIERS

  • Current Taxon Name (Soil Name): Clarksville
  • OSD
  • Series Extent
  • User Site ID: 1991MO123029M
  • User Pedon ID: 1991MO123029M
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M9112329
  • NCSS Pedon Lab Data NASIS Record ID - 26847
  • Print Date: 3/31/2025

    • 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: 37.4763870
  • Std. Longitude: -90.1491699
  • Datum: WGS84
  • Township: T32N
  • Range: R8E
  • Section: 10
  • PLSS Details: 1600 feet S and 1300 feet W of the NE corner
  • Location Description: 1,600 feet south and 1,300 feet west of the northeast corner of sec. 10, T. 32 N., R. 8 E.
  • Map Unit: 73139—Poynor-Clarksville-Scholten complex, 8 to 15 percent slopes, stony13D—Clarksville gravelly silt loam, 5 to 14 percent slopes
  • State: Missouri
  • County: MO123—Madison
  • MLRA: 116A—Ozark Highland
  • MLRA Soil Survey Area: NC-SPM—Springfield, Missouri
  • Non-MLRA Soil Survey Area: MO123—Madison County, Missouri
  • 7.5 Minute USGS Quad: 37090-D2—Marquand, Missouri

    • PEDON

  • Describers Name: RDC and MLC
  • Current Taxonomic Class: Loamy-skeletal, siliceous, semiactive, mesic Typic Paleudults
  • Current Taxon Kind: series
  • Pedon Type: TUD pedon
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Clarksville
  • PSC - 54 to 104 cm.
  • Classificaton Date - 4/1/2011
  • Soil Taxonomic Edition - eighth edition
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Clarksville
  • Taxonomic Class - Loamy-skeletal, siliceous, semiactive, mesic Typic Paleudults
  • Taxon Kind - series
  • PSC - 54 to 104 cm.
  • Classificaton Date - 10/3/1991
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Field Measured Properties: 29 Cation exchange capacity to clay ratio


    • SITE

  • Parent Material: residuum
  • Landscape: plateau
  • Landform: V-shaped valley
  • Runoff: very high
  • Drainage Class: somewhat excessively
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments: 2.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/3/1991 (actual site observation date)
  • Air Photo ID: D-5
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    3—51

    51—165

    —-

    —-
    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

    26

    —

    —

    259

    —

    180

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Oi—0 to 3 centimeters (0.0 to 1.2 inches); slightly decomposed plant material; fragments.
    A—3 to 16 centimeters (1.2 to 6.3 inches); brown (10YR 4/3), light gray (10YR 7/2), dry; very gravelly silt loam; moderate very fine and fine granular structure; very friable; 10.0 very fine to medium roots; 10 percent by volume 75-162-250 millimeter unspecified fragments and 46 percent by volume subangular 2-39-75 millimeter unspecified fragments; extremely acid, pH 4.4, hellige-truog; abrupt wavy boundary. Lab sample # MU012375
    E1—16 to 33 centimeters (6.3 to 13.0 inches); yellowish brown (10YR 5/4), very pale brown (10YR 7/3), dry; gravelly silt loam; weak fine subangular blocky parts to weak very fine granular structure; very friable; 10.0 fine to coarse roots; 1 percent by volume 75-162-250 millimeter unspecified fragments and 32 percent by volume subangular 2-39-75 millimeter unspecified fragments; very strongly acid, pH 4.8, hellige-truog; abrupt wavy boundary. Lab sample # MU012376
    E2—33 to 54 centimeters (13.0 to 21.3 inches); light yellowish brown (10YR 6/4), very pale brown (10YR 7/3), dry; extremely gravelly silt loam; weak fine subangular blocky parts to moderate very fine granular structure; friable; 5.0 very fine to coarse roots; 10 percent by volume angular 75-162-250 millimeter unspecified fragments and 66 percent by volume subangular 2-39-75 millimeter unspecified fragments; very strongly acid, pH 5.0, hellige-truog; clear wavy boundary. Lab sample # MU012377. Cobbles at lower boundary
    Bt1—54 to 74 centimeters (21.3 to 29.1 inches); strong brown (7.5YR 4/6) extremely gravelly clay loam; 10 percent yellowish red (5YR 4/6) fine distinct mottles; moderate fine subangular blocky structure; firm; 5.0 fine and medium roots; 35 percent prominent clay films on vertical faces of peds and 35 percent distinct silt coats on faces of peds; 10 percent fine light brown (7.5YR 6/4) and 10 percent fine yellowish red (5YR 4/6); 65 percent by volume subangular 2-39-75 millimeter unspecified fragments; 20 BT; strongly acid, pH 5.1, hellige-truog; clear wavy boundary. Lab sample # MU012378. Silt pockets mixed from above.
    Bt2—74 to 110 centimeters (29.1 to 43.3 inches); reddish yellow (7.5YR 6/6) very gravelly clay loam; 10 percent red (2.5YR 4/6) fine and medium prominent and 10 percent brownish yellow (10YR 6/6) fine prominent mottles; moderate very fine and fine subangular blocky structure; firm; 0.5 very fine and fine roots; 35 percent distinct silt coats on faces of peds and 35 percent prominent clay films on faces of peds; 3 percent by volume 75-162-250 millimeter unspecified fragments and 39 percent by volume subangular 2-39-75 millimeter unspecified fragments; 30 BT; very strongly acid, pH 4.9, hellige-truog; abrupt wavy boundary. Lab sample # MU012379
    2Bt3—110 to 143 centimeters (43.3 to 56.3 inches); strong brown (7.5YR 5/6) very gravelly clay; 30 percent red (2.5YR 4/6) fine and medium prominent and 30 percent light brown (7.5YR 6/4) fine distinct mottles; moderate very fine and fine subangular blocky structure; firm; 0.5 very fine to medium roots; on vertical faces of peds and 75 percent prominent clay films on faces of peds; 1 percent medium light gray (10YR 7/2) clay bodies; 1 percent by volume 75-162-250 millimeter unspecified fragments and 36 percent by volume subangular 2-39-75 millimeter unspecified fragments; strongly acid, pH 5.1, hellige-truog; clear wavy boundary. Lab sample # MU012380
    2Bt4—143 to 168 centimeters (56.3 to 66.1 inches); 60 percent red (2.5YR 4/6) and 40 percent strong brown (7.5YR 5/6) very gravelly clay; moderate fine subangular blocky structure; firm; 0.5 very fine to medium roots; 35 percent prominent clay films on faces of peds; 30 percent coarse noncoherent cemented pinkish gray (7.5YR 7/2) iron depletions; 10 percent medium light gray (10YR 7/2) clay bodies; 38 percent by volume subangular 2-39-75 millimeter unspecified fragments; very strongly acid, pH 4.9, hellige-truog. Lab sample # MU012381