IDENTIFIERS

  • Current Taxon Name (Soil Name): Union
  • OSD
  • Series Extent
  • User Site ID: 2000MO055012M
  • User Pedon ID: 2000MO055012
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - MCL
  • Lab Pedon # - M0005512
  • Print Date: 2/16/2025

    • 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: 38.1673389
  • Std. Longitude: -91.4113028
  • Datum: WGS84
  • Township: T40N
  • Range: R4W
  • Section: 30
  • PLSS Details: 1700 feet W and 500 feet N of the SE corner
  • Location Description: 1700 Ft. W., 500ft N. of SE corner of Sec. 30 T40N. R4W.
  • State: Missouri
  • County: MO055—Crawford
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO055—Crawford County, Missouri
  • 7.5 Minute USGS Quad: 38091-B4—Oak Hill, Missouri

    • PEDON

  • Describers Name: WK, JF, SL
  • Current Taxonomic Class: Fine, mixed, active, mesic Oxyaquic Fragiudalfs
  • 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 - Union
  • PSC - 18 to 68 cm.
  • Classificaton Date - 12/6/2012
  • Classifier - J.R. Perkins
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Subclass - udic
  • Sampled As Information:
  • Soil Name - Union
  • Taxonomic Class - Fine, mixed Oxyaquic Fragiudalfs
  • Taxon Kind - series
  • PSC - 18 to 68 cm.
  • Classificaton Date - 4/24/2000
  • Moisture Class - udic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified


    • SITE

  • Parent Material: loess over pedisediment over residuum
  • Landscape: hills
  • Landform: ridge
  • Geomorphic Component Hills: interfluve
  • Hill Slope Profile: summit
  • Slope Position: upper third
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: convex
  • Drainage Class: moderately well
  • Geology: Pennslyvanian Undifferentiated formation of the Pennslyvanian Undifferentiated group.
  • Surface Fragments:
  • Benchmark Soil?: yes

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/24/2000 (actual site observation date)
  • Air Photo ID: C1
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - hayland
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    abrupt textural change

    fragipan

    noncoherent

    noncoherent

    18 - 18

    61 - 112

    - 0 -

    - 51 -

    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    abrupt textural change

    redox depletions with chroma 2 or less

    lithologic discontinuity

    fragipan

    lithologic discontinuity

    0—18

    18—203

    18—18

    61—112

    61—112

    61—112

    112—203

    —18—

    —185—

    —0—

    —51—

    —51—

    —51—

    —91—
    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

    3

    —

    —

    286.5

    —

    340

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 18 centimeters (0.0 to 7.1 inches); brown (10YR 4/3), light brownish gray (10YR 6/2), dry; silt loam; 15 percent clay; weak fine platy, and weak fine granular structure; friable; many (15.0) very fine roots; many (6.0) tubular pores; fragments; slightly acid, pH 6.1, pH meter; clear smooth boundary. Lab sample # MU021390
    Bt1—18 to 41 centimeters (7.1 to 16.1 inches); strong brown (7.5YR 5/6) silty clay; 42 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; firm; common (3.0) very fine roots; common (3.0) medium vesicular and common (3.0) fine vesicular pores; 35 percent distinct clay films on faces of peds; fragments; very strongly acid, pH 4.5, pH meter; clear smooth boundary. Lab sample # MU021391. discontinuous - phpvsfiid 136948; discontinuous - phpvsfiid 136948
    Bt2—41 to 61 centimeters (16.1 to 24.0 inches); 60 percent dark yellowish brown (10YR 4/4) and 40 percent strong brown (7.5YR 5/6) silty clay; 40 percent clay; moderate medium subangular blocky structure; firm; common (3.0) very fine roots; common (3.0) medium vesicular and common (3.0) fine vesicular pores; 35 percent distinct clay films on faces of peds; fragments; very strongly acid, pH 4.5, pH meter; clear wavy boundary. Lab sample # MU021392. discontinuous - phpvsfiid 136949; discontinuous - phpvsfiid 136949
    2Btx1—61 to 74 centimeters (24.0 to 29.1 inches); 65 percent yellowish brown (10YR 5/4) and 35 percent light brownish gray (10YR 6/2) silt loam; 18 percent clay; weak medium prismatic, and weak coarse prismatic structure; very firm; brittle; few (0.5) very fine roots in cracks; 6.0 medium vesicular and 6.0 fine vesicular pores; 15 percent faint clay films on faces of peds; 3 percent by volume nonflat angular indurated 2-39-75 millimeter chert fragments; very strongly acid, pH 4.5, pH meter; clear wavy boundary. Lab sample # MU021393. 65% Brittle; patchy - phpvsfiid 136950; patchy - phpvsfiid 136950
    2Btx2—74 to 97 centimeters (29.1 to 38.2 inches); 80 percent yellowish brown (10YR 5/6) and 20 percent light brownish gray (10YR 6/2) extremely gravelly loam; 14 percent clay; weak very coarse prismatic structure; very firm; brittle; common (3.0) very fine vesicular and common (3.0) fine vesicular pores; 15 percent faint clay films on faces of peds; 10 percent by volume nonflat indurated 75-162-250 millimeter quartzite fragments and 65 percent by volume nonflat indurated 2-39-75 millimeter limestone, cherty fragments; very strongly acid, pH 4.9, pH meter; clear wavy boundary. Lab sample # MU021394. patchy - phpvsfiid 136951; patchy - phpvsfiid 136951
    2Btx3—97 to 112 centimeters (38.2 to 44.1 inches); 60 percent light yellowish brown (10YR 6/4) and 20 percent light brownish gray (10YR 6/2) and 20 percent strong brown (7.5YR 5/6) extremely gravelly silt loam; 23 percent clay; weak coarse prismatic structure; very firm; 15 percent faint clay films on faces of peds; 1 percent light red (2.5YR 6/8) iron concretions; 20 percent by volume nonflat indurated 75-162-250 millimeter quartzite fragments and 55 percent by volume nonflat indurated 2-39-75 millimeter limestone, cherty fragments; strongly acid, pH 5.2, pH meter; clear wavy boundary. Lab sample # MU021395. patchy - phpvsfiid 136952; patchy - phpvsfiid 136952
    3Bt1—112 to 155 centimeters (44.1 to 61.0 inches); 80 percent yellowish red (5YR 5/6) and 20 percent reddish yellow (7.5YR 6/6) clay; 69 percent clay; moderate medium prismatic structure; very firm; few (0.1) fine roots; 60 percent distinct clay films on faces of peds; 3 percent by volume nonflat indurated 2-39-75 millimeter limestone, cherty fragments; strongly acid, pH 5.5, pH meter; clear smooth boundary. Lab sample # MU021396. continuous - phpvsfiid 136953; continuous - phpvsfiid 136953
    3Bt2—155 to 203 centimeters (61.0 to 79.9 inches); reddish yellow (7.5YR 6/8) clay; 62 percent clay; moderate medium prismatic structure; very firm; 60 percent distinct clay films on faces of peds; 15 percent prominent manganese coatings; fragments; slightly acid, pH 6.1. Lab sample # MU021397. continuous - phpvsfiid 136954; continuous - phpvsfiid 136954