IDENTIFIERS

  • Current Taxon Name (Soil Name): Irwin
  • OSD
  • Series Extent
  • User Site ID: 89KS161047
  • User Pedon ID: 89KS161047
  • User Site Association ID: Fort Riley LCTA
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Pedon # - 90P0082
  • NCSS Pedon Lab Data NASIS Record ID - 62015
  • Print Date: 4/17/2025

    • 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: 39.1583636
  • Std. Longitude: -96.8278120
  • Datum: WGS84
  • Township: 10 S
  • Range: 5 E
  • Section: 25
  • PLSS Details: 1000 feet east and 1000 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: Sobecki, Wehmueller
  • 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 - 8 to 58 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: upper third
  • Slope Shape Across: linear
  • Slope Shape Down: convex
  • 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—61

    8—170

    —61—

    —162—
    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

    6

    —

    —

    399

    —

    90

    0

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 8 centimeters (0.0 to 3.1 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; silty clay loam; moderate fine and medium granular structure; slightly hard, friable; 10.0 fine roots throughout; fragments; abrupt smooth boundary. 90P0555
    Bt1—8 to 41 centimeters (3.1 to 16.1 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; silty clay; moderate fine and medium subangular blocky structure; firm; 1.0 fine roots throughout; 30 percent distinct very dark gray (10YR 3/1) clay films on faces of peds; fragments; gradual smooth boundary. 90P0556; discontinuous - phpvsfiid 22741; discontinuous - phpvsfiid 22741
    Bt2—41 to 61 centimeters (16.1 to 24.0 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; silty clay; moderate medium subangular blocky structure; very firm; 1.0 fine roots between peds; 30 percent distinct very dark grayish brown (10YR 3/2) clay films on faces of peds; fragments; clear smooth boundary. 90P0557; discontinuous - phpvsfiid 22742; discontinuous - phpvsfiid 22742
    Bt3—61 to 79 centimeters (24.0 to 31.1 inches);, brown (10YR 4/3), moist; silty clay loam; moderate fine and medium subangular blocky structure; firm; 26 percent distinct dark brown (10YR 3/3) clay films on faces of peds; 10 percent medium and coarse spherical carbonate concretions; fragments; clear smooth boundary. 90P0558; discontinuous - phpvsfiid 22743; discontinuous - phpvsfiid 22743
    2Bt4—79 to 99 centimeters (31.1 to 39.0 inches);, brown (10YR 4/3), moist; silty clay; 15 percent very dark grayish brown (10YR 3/2) medium distinct and 15 percent yellowish red (5YR 5/8) medium prominent mottles; moderate medium subangular blocky structure; very firm; 1.0 fine roots between peds; 15 percent distinct dark brown (10YR 3/3) clay films on faces of peds; 1 percent fine spherical carbonate masses; fragments; gradual smooth boundary. 90P0559; 5YR 5/8 motttles are neoferrans associated with root channels and vertical ped faces, sand content is higher than horizon above; discontinuous - phpvsfiid 22744; discontinuous - phpvsfiid 22744
    2Bt5—99 to 122 centimeters (39.0 to 48.0 inches);, brown (10YR 4/3), moist; silty clay; 1 percent yellowish red (5YR 5/8) fine prominent and 5 percent yellowish brown (10YR 5/6) fine distinct mottles; weak medium subangular blocky structure; firm; 1.0 very fine roots throughout; 15 percent distinct dark brown (10YR 3/3) clay films on faces of peds; fragments; clear smooth boundary. 90P0560; discontinuous - phpvsfiid 22745; discontinuous - phpvsfiid 22745
    2Bt6—122 to 135 centimeters (48.0 to 53.1 inches);, brown (10YR 5/3), moist; silty clay loam; 15 percent yellowish brown (10YR 5/6) fine distinct mottles; weak fine and medium subangular blocky structure; firm; 10 percent distinct skeletans on vertical faces of peds and 15 percent distinct very dark grayish brown (10YR 3/2) clay films on faces of peds; fragments; clear smooth boundary. 90P0561; at center of mottle is a < 1 mm. soft iron manganese concretion; patchy - phpvsfiid 22747; discontinuous - phpvsfiid 22746; patchy - phpvsfiid 22747; discontinuous - phpvsfiid 22746
    3Btb1—135 to 157 centimeters (53.1 to 61.8 inches);, dark brown (7.5YR 3/2), moist; silty clay loam; 3 percent yellowish red (5YR 4/6) fine distinct mottles; weak medium prismatic, and moderate fine and medium subangular blocky structure; firm; 30 percent distinct dark brown (7.5YR 3/2) clay films on faces of peds; 3 percent by volume angular 2-39-75 millimeter limestone, cherty fragments; clear smooth boundary. 90P0562; chert fragments are as large as 5 mm.; discontinuous - phpvsfiid 22748; discontinuous - phpvsfiid 22748
    3Btb2—157 to 168 centimeters (61.8 to 66.1 inches);, brown (7.5YR 4/4), moist; silty clay loam; 20 percent strong brown (7.5YR 5/6) fine and medium distinct mottles; weak medium subangular blocky structure; firm; 10 percent distinct clay films on vertical faces of peds; 6 percent by volume angular 2-39-75 millimeter limestone, cherty fragments; clear smooth boundary. 90P0563; chert fragments are 0.2 to 2 cm. in diameter; patchy - phpvsfiid 22749; patchy - phpvsfiid 22749
    4BC—168 to 193 centimeters (66.1 to 76.0 inches);, olive brown (2.5Y 4/4) and olive (5Y 5/3), moist; silty clay; 10 percent yellowish brown (10YR 5/8) fine and medium prominent mottles; weak medium subangular blocky structure; firm; 5.0 fine tubular pores; 20 percent distinct very dark grayish brown (10YR 3/2) manganese or iron-manganese stains on vertical faces of peds; fragments; clear smooth boundary. 90P0564; the pores have slight effervescence; discontinuous - phpvsfiid 22750; discontinuous - phpvsfiid 22750
    4C—193 to 211 centimeters (76.0 to 83.1 inches);, olive (5Y 5/3), moist; fragments. 90P0565; calcareous clayey shale