IDENTIFIERS

  • Current Taxon Name (Soil Name): Kniffin
  • OSD
  • Series Extent
  • User Site ID: S1985IA185056
  • User Pedon ID: 85IA1850056
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 86P0417
  • NCSS Pedon Lab Data NASIS Record ID - 58222
  • 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: 40.8919449
  • Std. Longitude: -93.1755524
  • Datum: WGS84
  • Township: 70N
  • Range: 20W
  • Section: 5
  • PLSS Details: 2216 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 - 3
  • 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

    9

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    —

    —

    —

    45

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    —

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    1Ap—0 to 10 centimeters (0.0 to 3.9 inches); very dark grayish brown (10YR 3/2) interior silty clay; 4 percent sand; 42 percent clay; 1 percent strong brown (7.5YR 5/6) mottles; strong fine and medium subangular blocky structure; friable; 0.1 coarse roots; fragments; neutral, pH 6.8, hellige-truog; abrupt smooth boundary. Lab sample # 86P02474. 45% (10YR 4/2) streaks, pockets and lumps.; very few coarse roots; very few to few 7.5YR56 mottles
    1Bt1—10 to 25 centimeters (3.9 to 9.8 inches); dark grayish brown (10YR 4/2) interior silty clay; 4 percent sand; 49 percent clay; 11 percent strong brown (7.5YR 5/6) fine prominent mottles; moderate medium prismatic, and moderate fine and medium subangular blocky structure; firm; 0.1 coarse roots; 15 percent prominent very dark gray (10YR 3/1), moist, oxide coats in root channels and/or pores and 37 percent prominent dark gray (10YR 4/1), moist, clay films on faces of peds; fragments; moderately acid, pH 6.0, hellige-truog; clear smooth boundary. Lab sample # 86P02475. few oxide coats surface features in root channels and/or pores; common clay films surface features on faces of peds; very few coarse roots; common fine prominent 7.5YR56 mottles
    1Bt2—25 to 38 centimeters (9.8 to 15.0 inches); dark grayish brown (2.5Y 4/2) interior silty clay; 4 percent sand; 46 percent clay; 11 percent strong brown (7.5YR 5/6) fine prominent mottles; moderate fine prismatic, and moderate fine and medium subangular blocky structure; firm; 0.1 fine roots; 15 percent prominent very dark gray (10YR 3/1), moist, oxide coats in root channels and/or pores and 37 percent prominent dark gray (10YR 4/1), moist, clay films on faces of peds; fragments; slightly acid, pH 6.2, hellige-truog; clear smooth boundary. Lab sample # 86P02476. 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
    1Bt3—38 to 56 centimeters (15.0 to 22.0 inches); dark grayish brown (2.5Y 4/2) interior silty clay; 4 percent sand; 44 percent clay; 1 percent grayish brown (2.5Y 5/2) fine faint and 11 percent strong brown (7.5YR 5/6) fine prominent mottles; moderate medium prismatic structure; firm; 0.1 fine roots; 2 percent distinct very dark gray (10YR 3/1), moist, oxide coats in root channels and/or pores and 15 percent distinct dark gray (10YR 4/1), moist, clay films on faces of peds; fragments; moderately acid, pH 6.0, hellige-truog; clear smooth boundary. Lab sample # 86P02477. very few oxide coats surface features in root channels and/or pores; few clay films surface features on faces of peds; very few fine roots; common fine prominent 7.5YR56 mottles; few fine faint 2.5Y52 mottles
    1Bt4—56 to 81 centimeters (22.0 to 31.9 inches); grayish brown (2.5Y 5/2) interior and strong brown (7.5YR 5/6) interior silty clay loam; 4 percent sand; 36 percent clay; moderate medium prismatic structure; firm; 0.1 fine roots; 2 percent distinct very dark gray (10YR 3/1), moist, oxide coats in root channels and/or pores and 15 percent faint dark gray (10YR 4/1), moist, clay films on faces of peds; fragments; neutral, pH 6.6, hellige-truog; clear smooth boundary. Lab sample # 86P02478. Horizon split 56 to 66 cm 86P2478 and 66 to 81 cm sample number 86P2479.; very few oxide coats surface features in root channels and/or pores; few clay films surface features on faces of peds; very few fine roots
    1BC—81 to 102 centimeters (31.9 to 40.2 inches); grayish brown (2.5Y 5/2) interior silty clay loam; 8 percent sand; 32 percent clay; 30 percent strong brown (7.5YR 5/6) medium prominent mottles; moderate medium prismatic structure; firm; 0.1 fine roots; 2 percent distinct very dark gray (10YR 3/1), moist, oxide coats in root channels and/or pores and 2 percent faint dark gray (10YR 4/1), moist, clay films on faces of peds; fragments; neutral, pH 6.8, hellige-truog; abrupt wavy boundary. Lab sample # 86P02480. very few oxide coats surface features in root channels and/or pores; very few clay films surface features on faces of peds; very few fine roots; many medium prominent 7.5YR56 mottles
    2C—102 to 122 centimeters (40.2 to 48.0 inches); dark gray (10YR 4/1) interior clay loam; 25 percent sand; 32 percent clay; 11 percent strong brown (7.5YR 4/6) medium faint mottles; weak coarse platy structure; firm; 0.1 fine roots; fragments; neutral, pH 6.8, hellige-truog; gradual smooth boundary. very few fine roots; common medium faint 7.5YR46 mottles
    2C—122 to 152 centimeters (48.0 to 59.8 inches); dark gray (10YR 4/1) interior and strong brown (7.5YR 4/6) interior loam; 35 percent sand; 25 percent clay; weak coarse platy structure; firm; 0.1 fine roots; fragments; neutral, pH 6.8, hellige-truog. very few fine roots