IDENTIFIERS

  • Current Taxon Name (Soil Name): Kniffin
  • OSD
  • Series Extent
  • User Site ID: S1985IA185054
  • User Pedon ID: 85IA1850054
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 86P0415
  • NCSS Pedon Lab Data NASIS Record ID - 58220
  • 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: 40.8916664
  • Std. Longitude: -93.1755524
  • Datum: WGS84
  • Township: 70N
  • Range: 20W
  • Section: 5
  • PLSS Details: 2322 feet south and 453 feet west of northeast corner
  • State: Iowa
  • County: IA185—Wayne
  • MLRA: 109—Iowa and Missouri Heavy Till Plain
  • Non-MLRA Soil Survey Area: IA185—Wayne County, Iowa

    • PEDON

  • Describers Name: TAD and JMG
  • Current Taxonomic Class: Fine, smectitic, mesic Mollic Ochraqualfs
  • Current Taxon Kind: series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 5
  • Correlated Information:
  • Soil Name - Kniffin
  • Classificaton Date - 7/11/2007
  • Moisture Class - aquic
  • Sampled As Information:
  • Soil Name - Kniffin
  • Taxonomic Class - Fine, montmorillonitic, mesic Udollic Ochraqualf
  • Taxon Kind - series
  • Classificaton Date - 12/1/1985
  • Moisture Class - aquic
  • Moisture SUBClass - udic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: loess
  • Landscape: upland
  • Drainage Class: somewhat poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 12/1/1985 (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
  • Site Erosion Accelerated: water erosion
    • 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

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    —

    —

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    45

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    1Ap—0 to 23 centimeters (0.0 to 9.1 inches); very dark gray (10YR 3/1) interior silt loam; 4 percent sand; 24 percent clay; weak medium subangular blocky, and moderate very fine and fine granular structure; friable; 0.5 fine roots and 0.1 coarse roots; fragments; slightly acid, pH 6.2, hellige-truog; clear smooth boundary. Lab sample # 86P02460. (10YR 4/2) streaks and pockets.; few fine roots; very few coarse roots
    1Bt1—23 to 33 centimeters (9.1 to 13.0 inches); dark grayish brown (10YR 4/2) interior, light brownish gray (10YR 6/2) interior, dry; silty clay loam; 4 percent sand; 26 percent clay; moderate medium platy, and moderate very fine and fine subangular blocky structure; friable; 0.5 fine roots and 0.1 coarse roots; 37 percent distinct very dark gray (10YR 3/1) oxide coats on faces of peds; fragments; moderately acid, pH 5.8, hellige-truog; clear smooth boundary. Lab sample # 86P02461. common oxide coats surface features on faces of peds; very few coarse roots; few fine roots
    1Bt2—33 to 48 centimeters (13.0 to 18.9 inches); dark grayish brown (10YR 4/2) interior silty clay; 4 percent sand; 51 percent clay; moderate fine prismatic, and moderate very fine and fine subangular blocky structure; firm; 0.5 fine roots and 0.1 fine roots; 15 percent distinct very dark gray (10YR 3/1), moist, oxide coats in root channels and/or pores and 55 percent prominent very dark gray (10YR 3/1), moist, clay films on faces of peds; fragments; strongly acid, pH 5.4, hellige-truog; clear smooth boundary. Lab sample # 86P02462. few oxide coats surface features in root channels and/or pores; many clay films surface features on faces of peds; very few fine roots; few fine roots
    1Bt3—48 to 64 centimeters (18.9 to 25.2 inches); dark grayish brown (10YR 4/2) interior silty clay; 4 percent sand; 48 percent clay; 11 percent strong brown (7.5YR 5/6) fine prominent mottles; moderate medium prismatic, and moderate fine subangular blocky structure; firm; 0.1 fine roots; 15 percent distinct very dark gray (10YR 3/1), moist, oxide coats in root channels and/or pores and 37 percent distinct dark gray (10YR 4/1), moist, clay films on faces of peds; fragments; moderately acid, pH 5.6, hellige-truog; clear smooth boundary. Lab sample # 86P02463. few oxide coats surface features in root channels and/or pores; common clay films surface features on faces of peds; very few fine roots; common fine prominent 7.5YR56 mottles
    1Bt4—64 to 91 centimeters (25.2 to 35.8 inches); dark grayish brown (2.5Y 4/2) interior silty clay; 4 percent sand; 45 percent clay; 11 percent grayish brown (2.5Y 5/2) fine faint and 30 percent strong brown (7.5YR 5/6) fine prominent mottles; moderate medium prismatic, and moderate fine subangular blocky structure; firm; 0.1 fine roots; 15 percent distinct very dark gray (10YR 3/1), moist, oxide coats in root channels and/or pores and 37 percent distinct dark gray (10YR 4/1), moist, clay films on faces of peds; fragments; moderately acid, pH 6.0, hellige-truog; gradual smooth boundary. Lab sample # 86P02464. Horizon split 64 to 76 cm 86P2464 and 76 to 91 cm sample number 86P2465.; common clay films surface features on faces of peds; few oxide coats surface features in root channels and/or pores; very few fine roots; many fine prominent 7.5YR56 mottles; common fine faint 2.5Y52 mottles
    1Bt5—91 to 122 centimeters (35.8 to 48.0 inches); grayish brown (2.5Y 5/2) interior and strong brown (7.5YR 5/6) interior clay loam; 4 percent sand; 41 percent clay; weak medium prismatic, and moderate fine subangular blocky structure; firm; 0.1 fine roots; 15 percent distinct dark gray (10YR 4/1), moist, clay films on faces of peds and 15 percent prominent very dark gray (10YR 3/1), moist, oxide coats in root channels and/or pores; fragments; slightly acid, pH 6.4, hellige-truog; clear smooth boundary. Lab sample # 86P02466. few clay films surface features on faces of peds; few oxide coats surface features in root channels and/or pores; very few fine roots
    1BC—122 to 152 centimeters (48.0 to 59.8 inches); grayish brown (2.5Y 5/2) interior silty clay loam; 4 percent sand; 36 percent clay; 30 percent strong brown (7.5YR 5/6) fine prominent mottles; weak medium prismatic, and moderate medium subangular blocky structure; firm; 0.1 fine roots; 2 percent faint dark gray (10YR 4/1), moist, clay films on faces of peds and 15 percent prominent very dark gray (10YR 3/1), moist, oxide coats on faces of peds; fragments; neutral, pH 6.8, hellige-truog. very few clay films surface features on faces of peds; few oxide coats surface features on faces of peds; very few fine roots; many fine prominent 7.5YR56 mottles