IDENTIFIERS

  • Current Taxon Name (Soil Name): Clarksville
  • OSD
  • Series Extent
  • User Site ID: S1959MO065002
  • User Pedon ID: S1959MO065002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A2711
  • 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: 37.4839554
  • Std. Longitude: -91.2673492
  • Datum: WGS84
  • Township: T32N
  • Range: R3W
  • Section: 9
  • PLSS Details: Southeast quarter of northeast quarter
  • Location Description: Sinking Experimental Forest
  • State: Missouri
  • County: MO065—Dent
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO065—Dent County, Missouri
  • 7.5 Minute USGS Quad: 37091-D3—Loggers Lake, Missouri

    • PEDON

  • Describers Name: J. S. Allen, R. L Juve, John Van Dine, and F. J. Carlisle
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 2
  • Sampled As Information:
  • Soil Name - Clarksville
  • PSC - 46 to 96 cm.
  • Classificaton Date - 10/7/1959
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: residuum weathered from limestone
  • Landform: ridge
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/7/1959 (actual site observation date)
  • Air Photo ID: BLG2p-161
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - intermixed conifers and hardwoods
  • 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

    25

    —

    —

    —

    —

    225

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Aoo—0 to 4 centimeters (0.0 to 1.6 inches); fragments. Lab sample # 40A21218. Loose oak leaves and pine needles.
    Ao—4 to 5 centimeters (1.6 to 2.0 inches); black (10YR 2/1); 21.0 fine roots; fragments. Lab sample # 40A21219. decomposed litter containing fungal mycelia which bind the layer into a coherent mat.
    A1—5 to 9 centimeters (2.0 to 3.5 inches); very dark gray (10YR 3/1) and dark grayish brown (10YR 4/2), gray (10YR 5/1) and light brownish gray (10YR 6/2), dry; silt loam; weak fine granular structure; loose; fragments; clear boundary. Lab sample # 40A21220. estimated less than 10 percent chert fragments greater than 3/4-inch diameter than 3/4-inch diameter
    A21—9 to 19 centimeters (3.5 to 7.5 inches); grayish brown (10YR 5/2), very pale brown (10YR 8/2), dry; silt loam; weak fine granular structure; very friable; fragments; very strongly acid, pH 5.0, bromcresol green; clear boundary. Lab sample # 40A21221. estimated less than 10 percent chert fragments greater than 3/4-inch diameter
    A22—19 to 34 centimeters (7.5 to 13.4 inches); pale brown (10YR 6/3), very pale brown (10YR 8/3), dry; silt loam; friable; 3.0 fine tubular pores; fragments; moderately acid, pH 6.0, chlorophenol red; gradual boundary. Lab sample # 40A21222. flat chert surfaces give appearance of blocky structure but peds cannot be identified; many fine and medium vesicles
    A23—34 to 51 centimeters (13.4 to 20.1 inches); light yellowish brown (10YR 6/4), very pale brown (10YR 7/4) and very pale brown (10YR 8/2), dry; silt loam; friable; 21.0 fine and medium tubular pores; fragments; moderately acid, pH 5.8, chlorophenol red; clear boundary. Lab sample # 40A21223. flat chert surfaces give appearance of blocky structure but peds cannot be identified; estimated less than 10 percent chert fragments greater than 3/4-inch diameter
    B1—51 to 63 centimeters (20.1 to 24.8 inches); silty clay loam; light yellowish brown (10YR 6/4) and yellowish red (5YR 5/6) and strong brown (7.5YR 5/6) fine faint mottles; weak fine angular blocky structure; friable; 3.0 fine tubular pores; fragments; very strongly acid, pH 4.8, bromcresol green; gradual boundary. Lab sample # 40A21224. there is a weak association of the high value colors with pore spaces; estimated 15 percent chert greater than 3/4-inch diameter
    B2—63 to 96 centimeters (24.8 to 37.8 inches); silty clay loam; light yellowish brown (10YR 6/4) and reddish yellow (5YR 6/6) and yellowish red (5YR 5/6) mottles; weak fine angular blocky structure; friable; 3.0 fine tubular pores; yellowish red (5YR 5/6) clay films on faces of peds; fragments; very strongly acid, pH 4.8, bromcresol green; gradual boundary. Lab sample # 40A21225. clay films in tubular pores; when soil is dry there are many very thin gray silt coatings on natural surfaces and these are responsible for the 10YR 6/4 colors in the moist soil; estimated 25 percent chert fragments greater than 3/4-inch diameter
    B3—96 to 119 centimeters (37.8 to 46.9 inches); silty clay; light yellowish brown (10YR 6/4) and red (2.5YR 5/6) mottles; weak fine angular blocky structure; friable, slightly plastic; 10 percent red (2.5YR 5/6) clay films; fragments; very strongly acid, pH 4.8, bromcresol green; abrupt boundary. Lab sample # 40A21226. many pale-colored silty surfaces are evident when material is dry; chert fragments are sharply angular with discontinuous clay films and dark oxide dendrites on faces; estimated 25 percent chert greater than 3/4-inch diameter; there is a slight concentration of chert at the bottom of this horizon and in the top of the underlying material
    D1?—119 to 135 centimeters (46.9 to 53.1 inches); pale yellow (5Y 8/2) silty clay, silty clay loam; 21 percent strong brown (7.5YR 5/8) fine mottles; moderate medium and coarse angular blocky structure; firm, slightly sticky; light gray (5Y 7/2); fragments; abrupt boundary. Lab sample # 40A21227. some mottles are tubular pore fillings of clayey material; chert is angular and lacks surface oxide stains; estimated less than 10 percent of chert greater than 3/4-inch diameter
    D2?—135 to 157 centimeters (53.1 to 61.8 inches); clay; yellowish red (5YR 5/6) and red (2.5YR 4/6) and yellowish brown (10YR 5/6) mottles; weak fine angular blocky structure; firm; yellowish red (5YR 5/6) clay films; fragments; very strongly acid, pH 4.8, bromcresol green; clear boundary. Lab sample # 40A21228. few angular inclusions of white material similar to layer above; clay films on some surfaces account for much of the mottled appearance; estimated 20 percent chert greater than 3/4-inch diameter
    D3?—157 to 196 centimeters (61.8 to 77.2 inches); red (2.5YR 4/6) clay; 1 percent brownish yellow (10YR 6/6) mottles; weak fine angular blocky structure; firm; fragments. Lab sample # 40A21229. some white (5Y 8/1) clay fragments are included in the matrix; many faces are partially coated with black iron-manganese oxides; estimated less than 10 percent angular chert greater than 3/4-inch diameter. Horizontally this layer grades into material having 5YR 4/6 base color, more 5Y 8/1 and 10YR 4/6 material.