IDENTIFIERS

  • Current Taxon Name (Soil Name): Mahaska
  • OSD
  • Series Extent
  • User Site ID: S1961IA183002
  • User Pedon ID: 1961IA183002
  • Vegetation Plot ID: S1961IA183002
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 40A1422
  • NCSS Pedon Lab Data NASIS Record ID - 35030
  • Print Date: 11/24/2024

    • 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: 41.3672218
  • Std. Longitude: -91.7688904
  • Datum: WGS84
  • Township: 76N
  • Range: 8W
  • Section: 22
  • PLSS Details: 445 feet north and 68 feet west of SE corner of SW 1/4 SW 1/4
  • State: Iowa
  • County: IA183—Washington
  • MLRA: 108—Illinois and Iowa Deep Loess and Drift
  • Non-MLRA Soil Survey Area: IA183—Washington County, Iowa

    • PEDON

  • Describers Name: D. F. Slusher
  • Current Taxonomic Class: Fine, smectitic, mesic Aquertic Argiudolls
  • Current Taxon Kind: series
  • Pedon Type: TUD pedon
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 2
  • Correlated Information:
  • Soil Name - Mahaska
  • PSC - 61 to 102 cm.
  • Classificaton Date - 7/16/2007
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Mahaska
  • Classificaton Date - 10/5/1961
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landform: ridge
  • Slope Shape Down: convex
  • Surface Fragments: 0.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/5/1961 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    A1p

    A12

    A3

    B1

    B21

    B22

    B31

    B32

    C1

    0

    20

    33

    43

    58

    76

    89

    107

    130

    20

    33

    43

    58

    76

    89

    107

    130

    152

    34699

    34717

    34718

    34719

    34721

    34722

    34723

    34724

    34725

    Iowa State University

    Iowa State University

    Iowa State University

    Iowa State University

    Iowa State University

    Iowa State University

    Iowa State University

    Iowa State University

    Iowa State University

    32.8

    35.8

    38.8

    40.8

    39.4

    37.3

    34.7

    33.4

    30.9

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    64.9

    61.9

    59.3

    57.5

    58.3

    60.9

    63.1

    65.3

    68

    39.6

    37.5

    37.7

    36.4

    36.2

    37

    36.9

    36.6

    39

    25.3

    24.4

    21.6

    21.1

    22.1

    23.9

    26.2

    28.7

    29

    2.3

    2.3

    1.9

    1.7

    1.8

    1.8

    2.2

    1.3

    1.1

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    6

    5.5

    5.3

    5.5

    5.4

    5.5

    6.1

    6.3

    6.9
    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    A1p

    A12

    A3

    B1

    B21

    B22

    B31

    B32

    C1

    0

    20

    33

    43

    58

    76

    89

    107

    130

    20

    33

    43

    58

    76

    89

    107

    130

    152

    34699

    34717

    34718

    34719

    34721

    34722

    34723

    34724

    34725

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    A1p

    A12

    A3

    B1

    B21

    B22

    B31

    B32

    C1

    0

    20

    33

    43

    58

    76

    89

    107

    130

    20

    33

    43

    58

    76

    89

    107

    130

    152

    34699

    34717

    34718

    34719

    34721

    34722

    34723

    34724

    34725

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    Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    TRIFO

    Trifolium

    clover

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    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

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    45

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    A1p—0 to 20 centimeters (0.0 to 7.9 inches); black (10YR 2/1) and black (10YR 2/1) rubbed and very dark brown (10YR 2/2) rubbed, dark gray (10YR 4/1), dry; silty clay loam; weak medium subangular blocky parts to weak very fine granular structure; friable; 1 percent worm casts; fragments; moderately acid, pH 6.0; clear smooth boundary. Lab sample # 40A10974
    A12—20 to 33 centimeters (7.9 to 13.0 inches); black (10YR 2/1) and black (10YR 2/1) rubbed, dark gray (10YR 4/1), dry; silty clay loam; weak fine subangular blocky parts to moderate very fine and fine granular structure; friable; 0.5 fine tubular pores; 1 percent worm casts; fragments; strongly acid, pH 5.5; gradual smooth boundary. Lab sample # 40A10975. Very few fine hard concretions of an oxide.
    A3—33 to 43 centimeters (13.0 to 16.9 inches); very dark gray (10YR 3/1) and very dark grayish brown (10YR 3/2) and very dark grayish brown (10YR 3/2) interior and very dark gray (10YR 3/1) exterior and very dark grayish brown (10YR 3/2) rubbed, gray (10YR 5/1), dry; silty clay loam; moderate very fine subangular blocky, and moderate fine granular structure; friable; 0.5 fine tubular pores; fragments; strongly acid, pH 5.3; gradual smooth boundary. Lab sample # 40A10976. Very few fine hard concretions of an oxide.
    B1—43 to 58 centimeters (16.9 to 22.8 inches); 75 percent very dark gray (10YR 3/1) interior and 25 percent very dark grayish brown (10YR 3/2) interior and dark grayish brown (10YR 4/2) exterior and very dark grayish brown (10YR 3/2) rubbed and dark grayish brown (10YR 4/2) rubbed and dark grayish brown (2.5Y 4/2) exterior, grayish brown (10YR 5/2), dry; silty clay loam; moderate very fine subangular blocky parts to moderate fine granular structure; 0.5 fine tubular pores; 21 percent black (10YR 2/1) worm casts and 21 percent grayish brown (2.5Y 5/2) worm casts; fragments; strongly acid, pH 5.5; gradual smooth boundary. Lab sample # 40A10977. Few fine hard concretions of an oxide.
    B21—58 to 76 centimeters (22.8 to 29.9 inches); dark grayish brown (2.5Y 4/2) exterior and light olive brown (2.5Y 5/3) interior and dark grayish brown (2.5Y 4/2) rubbed silty clay loam; 1 percent light olive brown (2.5Y 5/6) fine faint mottles; moderate fine subangular blocky parts to moderate very fine subangular blocky structure; 3.0 fine tubular pores; 10 percent distinct clay films on faces of peds; fragments; strongly acid, pH 5.4; gradual smooth boundary. Lab sample # 40A10978. Few distinct very dark gray (10YR 3/1) stain streaks on ped exteriors; common fine hard concretions of an oxide.
    B22—76 to 89 centimeters (29.9 to 35.0 inches); reddish gray (5YR 5/2) exterior and light olive gray (5Y 6/2) interior silty clay loam; 3 percent yellowish brown (10YR 5/6) fine distinct and 3 percent brown (7.5YR 4/4) fine distinct mottles; weak fine prismatic parts to moderate fine subangular blocky structure; firm; 3.0 very fine tubular pores; 10 percent distinct dark gray (10YR 4/1), moist, clay films on faces of peds; fragments; strongly acid, pH 5.5; gradual smooth boundary. Lab sample # 40A10979. Common fine distinct strong brown (7.5YR 4.4) segregations; few fine hard concretions of an oxide.; discontinuous - phpvsfiid 1259080; discontinuous - phpvsfiid 1259080
    B31—89 to 107 centimeters (35.0 to 42.1 inches); olive gray (5Y 5/2) and light olive gray (5Y 6/2) and olive gray (5Y 5/2) exterior and light olive gray (5Y 6/2) interior silty clay loam; 3 percent light olive brown (2.5Y 5/4) fine faint mottles; moderate medium prismatic parts to moderate medium subangular blocky structure; firm; 3.0 very fine tubular pores; 10 percent dark gray (10YR 4/1), moist, clay films on faces of peds and in pores; fragments; slightly acid, pH 6.1; gradual smooth boundary. Lab sample # 40A10980. Common fine hard concretions of an oxide in association with strong brown colors; few distinct segregations of strong brown (7.5YR 5/6).
    B32—107 to 130 centimeters (42.1 to 51.2 inches); gray (5Y 5/1) and light olive gray (5Y 6/2) and gray (5Y 5/1) exterior and light olive gray (5Y 6/2) interior silty clay loam; 3 percent yellowish brown (10YR 5/4) fine distinct mottles; moderate medium and coarse prismatic structure; firm; 21.0 very fine tubular pores; 10 percent distinct very dark gray (10YR 3/1), moist, clay films on faces of peds and 10 percent clay films in root channels and/or pores; 21 percent clay bodies; fragments; slightly acid, pH 6.3; abrupt smooth boundary. Lab sample # 40A10981. Few distinct segregations of strong brown (7.5YR 5/6) and vertical streaks about 1-inch thick occurring in places; clay bodies are spherical; clay films appear in streaks.
    C1—130 to 140 centimeters (51.2 to 55.1 inches); strong brown (7.5YR 5/6) and gray (5Y 5/1) silty clay loam; moderate coarse prismatic structure; firm; 21.0 very fine tubular pores; 30 percent very dark gray (10YR 3/1), moist, clay films on faces of peds and in pores; fragments; neutral, pH 6.9; gradual wavy boundary. Lab sample # 40A10982. Few fine soft concretions of an oxide; clay films appear as streaks; strong brown (7.5YR 5/6) occurs as prominent horizontal band.
    C2—140 to 157 centimeters (55.1 to 61.8 inches); gray (5Y 5/1) silty clay loam; 21 percent yellowish brown (10YR 5/4) fine prominent mottles; massive; firm; 21.0 very fine tubular pores; 3 percent fine threadlike very dark gray (10YR 3/1) clay bodies; fragments; gradual wavy boundary. Lab sample # 40A10983. Distinct strong brown (7.5YR 5/6) occurring as vertical streaks from above horizon; clay bodies are in pores; few fine hard concretions of an oxide.
    C3—157 to 170 centimeters (61.8 to 66.9 inches); gray (5Y 6/1) silt loam; 21 percent yellowish brown (10YR 5/4) fine prominent mottles; massive; firm; 21.0 fine tubular pores; 21 percent fine threadlike clay bodies; fragments; diffuse smooth boundary. Lab sample # 40A10984. Clay accumulations in fine pores.
    C4—170 to 191 centimeters (66.9 to 75.2 inches); gray (5Y 6/1) silt loam; 21 percent yellowish brown (10YR 5/4) fine prominent mottles; massive; firm; 21.0 fine tubular pores; 21 percent fine threadlike clay bodies; fragments; diffuse smooth boundary. Lab sample # 40A10985. Clay bodies in fine pores.
    C5—191 to 208 centimeters (75.2 to 81.9 inches); strong brown (7.5YR 5/6) and yellowish brown (10YR 5/4) silt loam; 3 percent gray (5Y 6/1) fine distinct mottles; massive; firm; 21.0 fine tubular pores; 3 percent fine clay bodies; fragments; clear wavy boundary. Lab sample # 40A10986. Strong brown (7.5YR 5/6) occurs as horizontal bands; clay accumulations in fine pores and vertical channels.
    C6—208 to 218 centimeters (81.9 to 85.8 inches); gray (5Y 6/1) silt loam; light olive brown (2.5Y 5/4) and yellowish brown (10YR 5/4) mottles; fragments. Lab sample # 40A10987