IDENTIFIERS

  • Current Taxon Name (Soil Name): Irwin
  • OSD
  • Series Extent
  • User Site ID: 89KS161046
  • User Pedon ID: 89KS161046
  • User Site Association ID: Fort Riley LCTA
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Pedon # - 90P0081
  • NCSS Pedon Lab Data NASIS Record ID - 62014
  • Print Date: 4/25/2025

    • 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: 39.1572525
  • Std. Longitude: -96.8267008
  • Datum: WGS84
  • Township: 10 S
  • Range: 5 E
  • Section: 25
  • PLSS Details: 1300 feet east and 1300 feet south of the northwest corner
  • State: Kansas
  • County: KS161—Riley
  • MLRA: 75—Central Loess Plains
  • Non-MLRA Soil Survey Area: KS161—Riley County, Kansas
  • 7.5 Minute USGS Quad: 39096-B7—Fort Riley NE, Kansas

    • PEDON

  • Describers Name: Fortner, J., Watts, C.
  • Current Taxonomic Class: Fine, mixed, superactive, mesic Pachic Argiustolls
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: research site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Sampled As Information:
  • Soil Name - Irwin
  • Taxonomic Class - Fine, mixed, superactive, mesic Pachic Argiustolls
  • Taxon Kind - series
  • PSC - 20 to 70 cm.
  • Classificaton Date - 10/4/1989
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: upland
  • Landform: hillside
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: lower third
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Drainage Class: moderately well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/4/1989 (actual site observation date)
  • Air Photo ID: 29
  • Surface Cover Properties:
  • 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

    mollic epipedon

    argillic horizon

    0—66

    20—203

    —66—

    —183—
    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

    5

    —

    —

    395

    —

    90

    0

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 20 centimeters (0.0 to 7.9 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; silty clay loam; strong fine subangular blocky, and strong very fine subangular blocky structure; hard when dry, friable; 10.0 fine and medium roots throughout; fragments; clear smooth boundary. 90P0546; sampled whole 0-20cm layer, also sampled the 0-5cm separately (S89KS-161-46-10)
    Bt1—20 to 33 centimeters (7.9 to 13.0 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; silty clay; moderate fine subangular blocky structure; hard when dry, firm; 3.0 medium roots throughout and 10.0 fine roots throughout; 40 percent distinct very dark gray (10YR 3/1) clay films on all faces of peds; fragments; clear smooth boundary. 90P0547; discontinuous - phpvsfiid 22751; discontinuous - phpvsfiid 22751
    Bt2—33 to 66 centimeters (13.0 to 26.0 inches); brown (10YR 5/3), dark brown (10YR 3/3), moist; clay; moderate fine subangular blocky structure; extremely hard, very firm; 3.0 fine roots between peds; 30 percent distinct very dark grayish brown (10YR 3/2) clay films on all faces of peds; 1 percent by volume angular 2-39-75 millimeter limestone, cherty fragments; gradual smooth boundary. 90P0548; few vertical cracks filled with 10YR 3/2 material; continuous - phpvsfiid 22752; continuous - phpvsfiid 22752
    Bt3—66 to 91 centimeters (26.0 to 35.8 inches); grayish brown (10YR 5/2), dark grayish brown (10YR 4/2), moist; clay; 1 percent dark brown (7.5YR 3/4) fine prominent mottles; weak medium prismatic, and moderate medium subangular blocky structure; extremely hard, very firm; 3.0 fine roots between peds; 5 percent distinct slickensides (pedogenic) and 55 percent distinct very dark grayish brown (10YR 3/2) clay films on all faces of peds; 1 percent medium spherical carbonate masses; 1 percent by volume angular 2-39-75 millimeter limestone, cherty fragments; clear smooth boundary. 90P0549; carbonates within 4 cm. of lower boundary; discontinuous - phpvsfiid 22754; continuous - phpvsfiid 22753; discontinuous - phpvsfiid 22754; continuous - phpvsfiid 22753
    Bt4—91 to 122 centimeters (35.8 to 48.0 inches);, dark grayish brown (10YR 4/2), moist; silty clay; 25 percent strong brown (7.5YR 4/6) medium prominent mottles; weak medium prismatic, and moderate medium subangular blocky structure; very hard, very firm; 1.0 fine roots between peds; 30 percent faint dark grayish brown (10YR 4/2) clay films on all faces of peds; 1 percent medium and coarse spherical carbonate concretions; 1 percent by volume angular 2-39-75 millimeter limestone, cherty fragments; clear wavy boundary. 90P0550; discontinuous - phpvsfiid 22755; discontinuous - phpvsfiid 22755
    2Btb1—122 to 145 centimeters (48.0 to 57.1 inches); grayish brown (10YR 5/2), dark brown (7.5YR 3/2), moist; silty clay; 1 percent brown (10YR 5/3) medium distinct and 2 percent strong brown (7.5YR 4/6) medium distinct and 10 percent dark brown (7.5YR 3/4) medium prominent mottles; weak medium prismatic, and weak medium subangular blocky structure; very hard, firm; 1.0 fine roots throughout; 10 percent prominent very dark brown (10YR 2/2) manganese or iron-manganese stains on vertical faces of peds and 30 percent faint dark grayish brown (10YR 4/2) clay films on vertical faces of peds; fragments; gradual smooth boundary. 90P0554; patchy - phpvsfiid 22756; discontinuous - phpvsfiid 22757; patchy - phpvsfiid 22756; discontinuous - phpvsfiid 22757
    2Btb2—145 to 203 centimeters (57.1 to 79.9 inches); brown (7.5YR 5/2), dark brown (7.5YR 3/2), moist; silty clay; 2 percent brown (7.5YR 4/2) medium faint and 10 percent strong brown (7.5YR 4/6) medium distinct mottles; weak medium prismatic, and weak fine subangular blocky structure; very hard, very firm; 1.0 fine roots between peds; 1 percent prominent very dark brown (10YR 2/2) manganese or iron-manganese stains on vertical faces of peds and 26 percent faint dark grayish brown (10YR 4/2) clay films on vertical faces of peds; 1 percent by volume angular 2-39-75 millimeter limestone, unspecified fragments and 1 percent by volume angular 2-39-75 millimeter limestone, cherty fragments; gradual wavy boundary. 90P0552; few krotovina (50-100mm) filled with 10YR 5/3 material; patchy - phpvsfiid 22758; discontinuous - phpvsfiid 22759; patchy - phpvsfiid 22758; discontinuous - phpvsfiid 22759
    3Btb3—203 to 226 centimeters (79.9 to 89.0 inches); yellowish brown (10YR 5/4), brown (7.5YR 4/4), moist; gravelly silty clay; 10 percent brown (10YR 5/3) medium distinct mottles; weak medium prismatic, and moderate fine subangular blocky structure; very hard, very firm; 26 percent distinct dark yellowish brown (10YR 3/4) clay films on vertical faces of peds; 20 percent by volume angular 2-39-75 millimeter limestone, cherty fragments; gradual wavy boundary. 90P0553; discontinuous - phpvsfiid 22760; discontinuous - phpvsfiid 22760
    4BC—226 to 274 centimeters (89.0 to 107.9 inches);, 30 percent light olive brown (2.5Y 5/6) and 70 percent light reddish brown (5YR 6/3), moist; silty clay loam; weak medium prismatic structure; very hard, firm; 1.0 fine and medium tubular pores; fragments; gradual wavy boundary. 90P0554
    4Cr—274 to 300 centimeters (107.9 to 118.1 inches); fragments. clayey shale, did not sample this horizon