IDENTIFIERS

  • Current Taxon Name (Soil Name): Kniffin
  • OSD
  • Series Extent
  • User Site ID: 1969IA007002
  • User Pedon ID: 1969IA007002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A1487
  • NCSS Pedon Lab Data NASIS Record ID - 35095
  • Print Date: 11/21/2024

    • 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: 40.6450005
  • Std. Longitude: -93.0152740
  • Datum: WGS84
  • Township: 68N
  • Range: 19W
  • Section: 35
  • PLSS Details: 2588 feet N and 45 feet E of the SE corner of the SW 1/4, SW 1/4
  • Location Description: 2588 feet N and 45 feet E of the SE corner of the SW 1/4, SW 1/4
  • Map Unit: 531B—Kniffin silt loam, 2 to 5 percent slopes
  • State: Iowa
  • County: IA007—Appanoose
  • MLRA: 109—Iowa and Missouri Heavy Till Plain
  • Non-MLRA Soil Survey Area: IA007—Appanoose County, Iowa
  • 7.5 Minute USGS Quad: 40093-F1—Seymour East, Iowa

    • PEDON

  • Describers Name: J.D. Highland, J.R. Culver, and T.E. Fenton
  • Current Taxonomic Class: Fine, smectitic, mesic Udollic Ochraqualfs
  • Current Taxon Kind: series
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 2
  • Correlated Information:
  • Soil Name - Kniffin
  • PSC - 38 to 88 cm.
  • Classificaton Date - 7/23/2007
  • Moisture Class - udic
  • Moisture Subclass - udic
  • Sampled As Information:
  • Soil Name - Kniffin
  • Classificaton Date - 11/3/1969
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landform: ridge
  • Geomorphic Component Hills: interfluve
  • Slope Shape Down: convex
  • Drainage Class: somewhat poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/3/1969 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • 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

    ochric epipedon

    argillic horizon

    0—38

    38—145

    —-

    —-
    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

    2

    —

    —

    —

    —

    45

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 18 centimeters (0.0 to 7.1 inches); very dark gray (10YR 3/1) and very dark grayish brown (10YR 3/2) crushed, gray (10YR 5/1), dry; silt loam; moderate fine granular structure; friable; fragments; moderately acid, pH 5.8, unspecified; abrupt smooth boundary. Lab sample # 40A11584. cloddy.
    A—18 to 28 centimeters (7.1 to 11.0 inches); dark grayish brown (10YR 4/2), light brownish gray (10YR 6/2), dry; silt loam; weak coarse platy parts to moderate fine subangular blocky, and granular structure; friable; 15 percent black (10YR 2/1) oxide coats; fragments; very strongly acid, pH 4.8, unspecified; clear smooth boundary. Lab sample # 40A11585. discontinuous very dark grayish brown (10YR 3/2) coatings in upper 2 inches.
    AB—28 to 38 centimeters (11.0 to 15.0 inches); brown (10YR 5/3) silty clay loam; 1 percent yellowish brown (10YR 5/4) fine distinct mottles; moderate very fine subangular blocky structure; firm; grayish brown (10YR 5/2) coats on faces of peds and 15 percent faint dark grayish brown (10YR 4/2) clay films and 15 percent brown (7.5YR 4/4) oxide coats and 15 percent black (5YR 2/1) oxide coats; fragments; strongly acid, pH 5.3, unspecified; clear smooth boundary. Lab sample # 40A11586. discontinuous - phpvsfiid 1371716; discontinuous - phpvsfiid 1371716
    Bt1—38 to 53 centimeters (15.0 to 20.9 inches); dark grayish brown (10YR 4/2) silty clay; 1 percent strong brown (7.5YR 5/6) fine prominent and 25 percent yellowish brown (10YR 5/6) fine prominent mottles; moderate very fine and fine angular blocky, and subangular blocky structure; very firm; prominent dark grayish brown (10YR 4/2) clay films on faces of peds and distinct dark gray (10YR 4/1) clay films on faces of peds and 15 percent dark reddish brown (5YR 2/2) oxide coats; fragments; strongly acid, pH 5.3, unspecified; gradual smooth boundary. Lab sample # 40A11587. continuous - phpvsfiid 1371720; discontinuous - phpvsfiid 1371721; continuous - phpvsfiid 1371720; discontinuous - phpvsfiid 1371721
    Bt2—53 to 64 centimeters (20.9 to 25.2 inches); dark grayish brown (10YR 4/2) silty clay; 25 percent strong brown (7.5YR 5/6) fine prominent and 25 percent yellowish brown (10YR 5/6) fine prominent mottles; moderate medium prismatic parts to moderate fine subangular blocky structure; very firm; prominent dark gray (10YR 4/1) clay films and 15 percent dark reddish brown (5YR 2/2) oxide coats and 15 percent dark brown (7.5YR 3/2) oxide coats; fragments; strongly acid, pH 5.3, unspecified; gradual smooth boundary. Lab sample # 40A11588. continuous - phpvsfiid 1371723; continuous - phpvsfiid 1371723
    Bt3—64 to 79 centimeters (25.2 to 31.1 inches); grayish brown (2.5Y 5/2) silty clay; 10 percent strong brown (7.5YR 5/6) medium prominent mottles; moderate medium prismatic parts to moderate fine and medium subangular blocky structure; very firm; 15 percent faint dark grayish brown (2.5Y 4/2) clay films on faces of peds and 15 percent dark reddish brown (5YR 2/2) oxide coats and 15 percent dark brown (7.5YR 3/2) oxide coats; fragments; moderately acid, pH 5.8, unspecified; gradual smooth boundary. Lab sample # 40A11589. discontinuous - phpvsfiid 1371726; discontinuous - phpvsfiid 1371726
    Bt4—79 to 122 centimeters (31.1 to 48.0 inches); grayish brown (2.5Y 5/2) silty clay loam; 25 percent strong brown (7.5YR 5/8) coarse prominent mottles; moderate medium prismatic structure; very firm; 15 percent faint clay films in root channels and/or pores and 37 percent dark reddish brown (5YR 2/2) oxide coats; fragments; moderately acid, pH 5.8, unspecified; gradual smooth boundary. Lab sample # 40A11590. deoxidized and leached weathering zone.; discontinuous - phpvsfiid 1371729; discontinuous - phpvsfiid 1371729
    Bt5—122 to 145 centimeters (48.0 to 57.1 inches); gray (5Y 6/1) silty clay loam; 10 percent strong brown (7.5YR 5/8) coarse prominent mottles; moderate coarse prismatic structure; firm; grayish brown (2.5Y 5/2) on faces of peds and 37 percent dark reddish brown (5YR 2/2) oxide coats; fragments; neutral, pH 6.9, unspecified; clear smooth boundary. Lab sample # 40A11591. deoxidized and leached weathering zone.
    C—145 to 168 centimeters (57.1 to 66.1 inches); gray (5Y 5/1) and strong brown (7.5YR 5/8) silt loam, silty clay loam; massive; firm; 37 percent dark reddish brown (5YR 2/2) oxide coats; fragments; neutral, pH 6.9, unspecified. Lab sample # 40A11592. vertical cleavage; few dark gray (10YR 4/1) colloidal coats on vertical faces.