*** Primary Characterization Data ***
Pedon ID: S1995IA107011( Keokuk, Iowa )Print Date: Jan 8 2026 4:56PM

Sampled as on Aug 9, 1994:BUCKNELL ; Montmorillonitic Mollic Epiaqualfs
Revised to :
United States Department of Agriculture
SSL-ProjectCP95IA237   SOUTHEAST IOWANatural Resources Conservation Service
-Site IDS1995IA107011   Lat: 41° 19' 16.00" north  Long: 91° 59' 3.01" west  MLRA: 108CNational Soil Survey Center
-Pedon No. 95P0828Soil Survey Laboratory
-General Methods 1B1A, 2A1, 2BLincoln, Nebraska 68508-3866
LayerHorizonOrig HznDepth (cm)Field Label 1Field Label 2Field Label 3Field TextureLab Texture
 
95P05259ApAp0-15SICL SICL
95P05260Btg1Btg115-30C C
95P05261Btg2Btg230-48C C
95P05262Btg3Btg348-71C CL
95P05263Btg4Btg471-97CL CL
95P05264BCgBCg97-137CL SCL
95P05265Cg1Cg1137-157CL SCL
95P05266Cg2Cg2157-196CL SCL
95P05267Cg3Cg3196-244CL SCL
Pedon Calculations
Calculation NameResultUnits of Measure
 
CEC Activity, CEC7/Clay, Weighted Average0.67(NA)
Clay, carbonate free, Weighted Average44% wt
Weighted Particles, 0.1-75mm, 75 mm Base20% wt
Volume, >2mm, Weighted Average0% vol
Clay, total, Weighted Average44% wt
LE, Whole Soil, Summed to 1m9cm/m
 
Weighted averages based on control section: 15-65 cm


*** Primary Characterization Data ***
Pedon ID: S1995IA107011( Keokuk, Iowa )Print Date: Jan 8 2026 4:56PM
Sampled As:BUCKNELLMontmorillonitic Mollic Epiaqualfs
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  95P0828
PSDA  &  Rock Fragments-1--2--3--4--5--6--7--8--9--10--11--12--13--14--15--16--17--18-
 
(- - - - - Total - - - - - -)(- - Clay - - -)(- - - - Silt - - - - -)(- - - - - - - - - - - - Sand - - - - - - - - - - - -)( Rock Fragments   (mm) )
LabClaySiltSandFineCO3FineCoarseVFFMCVC(- - - - - - - - Weight - - - - - - - -)>2 mm
Text-<.002.05<<.002.02.05.10.25.512520.1-wt %
Depthure.002-.05-2.0002.002-.02-.05-.10-.25-.50-1-2-5-20-7575whole
Layer(cm)HorzPrep(- - - - - - - - - - - - - - - - - - - - - - - - - - % of <2mm Mineral Soil - - - - - - - - - - - - - - - - - - - - - - - - - - -)(- - - - - - - % of <75mm - - - - - -)soil
3A1a1a3A1a1a3A1a1a3A1a1a3A1a1a3A1a1a3A1a1a3A1a1a3A1a1a3A1a1a3A1a1a3A1a1a3B13B13B1
 
95P052590-15ApSsicl34.946.518.626.527.718.84.06.85.51.80.5trtr--15tr
95P0526015-30Btg1Sc49.029.621.439.917.012.66.35.05.92.31.91tr--161
95P0526130-48Btg2Sc43.631.624.835.818.213.44.89.07.92.20.9trtr--20tr
95P0526248-71Btg3Scl38.732.229.131.917.814.45.410.49.13.21.01tr--241
95P0526371-97Btg4Scl33.427.738.923.315.612.18.414.011.73.61.211tr322
95P0526497-137BCgSscl26.427.446.214.314.912.511.614.712.85.02.1211374
95P05265137-157Cg1Sscl24.327.548.213.215.312.29.417.513.65.22.531tr414
95P05266157-196Cg2Sscl24.827.148.113.314.812.39.917.713.75.11.711--392
95P05267196-244Cg3Sscl23.827.448.812.514.812.610.917.313.85.31.521--403
Bulk Density  &  Moisture-1--2--3--4--5--6--7--8--9--10--11--12--13--14-
 
(Bulk Density)Cole(- - - - - - - - - - - Water Content - - - - - - - - - - -)( Air Dry-Oven Dry )WRDAggst
33OvenWhole6103315001500 kPa(- - - - Ratio - - - -)WholeStabl(- - Ratio/Clay - -)
DepthkPaDrySoilkPakPakPakPaMoistCorrectedSoil2-0.5mm CEC71500 kPa
Layer(cm)HorzPrep (- - - g cm-3 - - -) (- - - - - - - - - - - - pct of < 2mm - - - - - - - - - - - -) cm3 cm-3%
4A1d4A1h4B1c3C2a1a3D14C18D18D1
 
95P052590-15ApS1.501.810.06425.414.81.0250.160.730.42
95P0526015-30Btg1S1.411.960.11529.619.01.0340.150.670.39
95P0526130-48Btg2S1.421.970.11529.417.01.0310.180.670.39
95P0526248-71Btg3S1.522.000.09525.116.11.0260.140.670.42
95P0526371-97Btg4S1.561.930.07324.113.61.0210.160.610.41
95P0526497-137BCgS1.661.880.04119.911.41.0160.140.580.43
95P05265137-157Cg1S1.741.900.02917.910.11.0150.130.560.42
95P05266157-196Cg2S1.721.890.03118.210.41.0130.130.580.42
95P05267196-244Cg3S1.731.890.02918.110.11.0140.140.560.42


*** Primary Characterization Data ***
Pedon ID: S1995IA107011( Keokuk, Iowa )Print Date: Jan 8 2026 4:56PM
Sampled As:BUCKNELLMontmorillonitic Mollic Epiaqualfs
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  95P0828
Water Content-1--2--3--4--5--6--7--8--9--10--11--12--13-
 
(- - Atterberg - -)(- - - - - Bulk Density - - - - -)(- - - - - - - - - - - - - - - - - - - - - - - Water Content - - - - - - - - - - - - - - - - - - - - -)
(- - - Limits - - -)FieldReconReconFieldRecon(- - - - - - - - - - - - - - Sieved Samples - - - - - - - - - - - - -)
LLPI33Oven3361033100200500
DepthkPaDrykPakPakPakPakPakPakPa
Layer(cm)HorzPreppct <0.4mm(- - - - - - - - g cm-3 - - - - - - -)(- - - - - - - - - - - - - - - - - - - - - - - % of < 2mm - - - - - - - - - - - - - - - - - - - - - -)
3C1e1a
 
95P052590-15ApS20.1
95P0526015-30Btg1S24.3
95P0526130-48Btg2S22.0
95P0526248-71Btg3S21.7
95P0526371-97Btg4S18.5
95P0526497-137BCgS15.3
95P05265137-157Cg1S14.1
95P05266157-196Cg2S13.9
95P05267196-244Cg3S13.9
Carbon  &  Extractions-1--2--3--4--5--6--7--8--9--10--11--12--13--14--15--16--17--18--19-
 
(- - - - - Total - - - - -)EstOCC/N(- - - Dith-Cit Ext - - -)(- - - - - - Ammonium Oxalate Extraction - - - - - -)(- - - Na Pyro-Phosphate - - -)
DepthCNSOC(WB)RatioFeAlMnAl+½FeODOEFeAlSiMnCFeAlMn
Layer(cm)HorzPrep(- - - - - - - - - - % of <2 mm - - - - - - - - - -)(- - - - - - - - - - - - - - - - - - - % of < 2mm - - - - - - - - - - - - - - - - -)mg kg-1(- - - - - - % of < 2mm - - - - -)
6B4a6A1c6C2b6G7a6D2a8J6C9b6G12b6V2b6D5b
 
95P052590-15ApS0.1511.61111.40.2tr0.220.050.180.130.05148.2
95P0526015-30Btg1S0.0600.4271.70.2--0.230.030.150.160.0421.2
95P0526130-48Btg2S0.0400.2460.5tr--0.190.030.120.130.0552.7
95P0526248-71Btg3S0.0290.1341.20.1tr0.150.030.110.090.05310.3
95P0526371-97Btg4S0.0240.0632.60.1tr--0.03--------
95P0526497-137BCgS0.0200.0113.70.10.10.100.030.110.050.05185.9
95P05265137-157Cg1S0.010.8tr--0.070.030.070.030.04160.4
95P05266157-196Cg2S0.021.80.1tr0.080.030.090.030.03242.0
95P05267196-244Cg3Str1.3tr0.10.080.030.090.040.04857.3


*** Primary Characterization Data ***
Pedon ID: S1995IA107011( Keokuk, Iowa )Print Date: Jan 8 2026 4:56PM
Sampled As:BUCKNELLMontmorillonitic Mollic Epiaqualfs
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  95P0828
CEC  &  Bases-1--2--3--4--5--6--7--8--9--10--11--12--13--14-
 
(- - - - - - NH4OAC Extractable Bases - - - - -)CEC8CEC7ECEC(- - - - Base - - - -)
SumAcid-ExtrKClSumNH4BasesAl(- Saturation -)
DepthCaMgNaKBasesityAlMnCatsOAC+AlSatSumNH4OAC
Layer(cm)HorzPrep(- - - - - - - - - - - - - - - - - cmol(+) kg-1 - - - - - - - - - - - - - - - - - - -)mg kg-1(- - - - cmol(+) kg-1 - - -)(- - - - - - - - % - - - - - - - -)
6N2e6O2d6P2b6Q2b6H5a6G9c6D3b5A3a5A8b5A3b5G15C35C1
 
95P052590-15ApS16.47.90.10.524.95.1--1.430.025.58398
95P0526015-30Btg1S15.611.10.40.527.68.7--0.136.332.67685
95P0526130-48Btg2S14.411.00.50.426.36.20.10.632.529.426.4tr8189
95P0526248-71Btg3S13.210.30.50.424.43.5--0.427.925.98794
95P0526371-97Btg4S11.2*8.60.60.320.72.9--0.423.620.488100
95P0526497-137BCgS9.0*6.20.50.215.91.5--0.417.415.291100
95P05265137-157Cg1S8.0*5.40.30.213.91.1--0.415.013.593100
95P05266157-196Cg2S8.9*5.40.30.314.91.1--0.416.014.393100
95P05267196-244Cg3S10.9*4.80.20.316.20.7--0.416.913.496100

*Extractable Ca may contain Ca from calcium carbonate or gypsum., CEC7 base saturation set to 100.
Salt-1--2--3--4--5--6--7--8--9--10--11--12--13--14--15--16--17--18--19--20-
 
(- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Water Extracted From Saturated Paste - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -)1:2
TotalElecElecExch
DepthCaMgNaKCO3HCO3FClPO4BrOACSO4NO2NO3H2OSaltsCondCondNaSAR
Layer(cm)HorzPrep(- - - - - mmol(+) L-1 - - - - -)(- - - - - - - - - - - - - - - - - - - - - - mmol(-) L-1 - - - - - - - - - - - - - - - - - - - -)(- - - - % - - - -)(- - dS m-1 - -)%
 
95P052590-15ApStr
95P0526015-30Btg1S1
95P0526130-48Btg2S2
95P0526248-71Btg3S2
95P0526371-97Btg4S3
95P0526497-137BCgS3
95P05265137-157Cg1S2
95P05266157-196Cg2S2
95P05267196-244Cg3S1


*** Primary Characterization Data ***
Pedon ID: S1995IA107011( Keokuk, Iowa )Print Date: Jan 8 2026 4:56PM
Sampled As:BUCKNELLMontmorillonitic Mollic Epiaqualfs
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  95P0828
pH  &  Carbonates-1--2--3--4--5--6--7--8--9--10--11-
 
(- - - - - - - - - - - - - - - - - - pH - - - - - - - - - - - - - - - - -)(- - Carbonate - -)(- - Gypsum - - -)
CaCl2As CaCO3As CaSO4*2H2OResist
Depth0.01MH2OSat<2mm<20mm<2mm<20mmohms
Layer(cm)HorzPrepKCl1:21:1PasteOxidNaF(- - - - - - - - - - - - % - - - - - - - - - - -)cm-1
4C1a2a4C1a2a6E1g
 
95P052590-15ApS6.46.9
95P0526015-30Btg1S4.95.8
95P0526130-48Btg2S5.15.8
95P0526248-71Btg3S6.06.5
95P0526371-97Btg4S6.97.5
95P0526497-137BCgS7.37.9tr
95P05265137-157Cg1S7.38.1--
95P05266157-196Cg2S7.48.2
95P05267196-244Cg3S7.68.3tr
Phosphorous-1--2--3--4--5--6--7--8--9--10--11--12-
 
(- - - - - - - - - - - - - - - - - - - - - - - Phosphorous - - - - - - - - - - - - - - - - - - - - -)KCl
MelanicNZAcidAnion Exch ResinBrayBrayOlsenH2OCitricMehlichExtr
DepthIndexOxalAvailableCapacity12AcidIIINO3
Layer(cm)HorzPrep%(- - - - - - - - - - - - - - - - - - - - - - - - - - - mg kg-1 - - - - - - - - - - - - - - - - - - - -)
6S3b
 
95P052590-15ApS3.0
95P0526015-30Btg1S--
95P0526130-48Btg2S--
95P0526248-71Btg3S--
95P0526371-97Btg4S--
95P0526497-137BCgS--
95P05265137-157Cg1S1.0
95P05266157-196Cg2S1.0
95P05267196-244Cg3S2.0


*** Primary Characterization Data ***
Pedon ID: S1995IA107011( Keokuk, Iowa )Print Date: Jan 8 2026 4:56PM
Sampled As:BUCKNELLMontmorillonitic Mollic Epiaqualfs
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  95P0828
Clay Mineralogy (<.002 mm)-1--2--3--4--5--6--7--8--9--10--11--12--13--14--15--16--17--18-
X-RayThermalElementalEGMEInter
SiO2Al2O3Fe2O3MgOCaOK2ONa2ORetnpreta
DepthFract7A2i tion
Layer(cm)Horzion( - - - - - - - - - peak size - - - - - - - - - - )(- - - - - - - - - % - - - - - - - - - -)(- - - - - - - - - - - - - - - - - - - - - % - - - - - - - - - - - - - - - - - - - - -)mg g-1
95P052590.0-15.0AptclyMT 3MI 3KK 3QZ 2
95P0526015.0-30.0Btg1tclyMT 3KK 3MI 3QZ 1LE 1
GE 1
95P0526248.0-71.0Btg3tclyMT 4MI 3KK 3QZ 2GE 1
95P0526497.0-137.0BCgtclyMT 3KK 3MI 3MC 2GE 2
95P05267196.0-244.0Cg3tclyKK 4MT 3MI 3QZ 2GE 2
HE 1

FRACTION INTERPRETATION:
tcly - Total Clay <0.002 mm

MINERAL INTERPRETATION:
GE GoethiteHE HematiteKK KaoliniteLE LepidocrociteMC Montmorillonite-Chlorite
MI MicaMT MontmorilloniteQZ Quartz

RELATIVE PEAK SIZE:5 Very Large4 Large3 Medium2 Small1 Very Small6 No Peaks


*** Primary Characterization Data ***
Pedon ID: S1995IA107011( Keokuk, Iowa )Print Date: Jan 8 2026 4:56PM
Sampled As:BUCKNELLMontmorillonitic Mollic Epiaqualfs
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  95P0828
Sand - Silt Mineralogy (2.0-0.002 mm)-1--2--3--4--5--6--7--8--9--10--11--12--13--14--15--16--17--18-
X-RayThermalOpticalEGMEInter
Tot ReGrain CountRetnpreta
DepthFract 7B1a2 tion
Layer(cm)Horzion( - - - - - - - - peak size - - - - - - - - - )(- - - - - - - - % - - - - - - - - - -)(- - - - - - - - - - - - - - - - - - - - % - - - - - - - - - - - - - - - - - -) mg g-1
95P052590.0-15.0Apcsi 73QZ 65FK 22CD 7HN 2FE 1FP 1
PR 1TM trRU trOP trBT trPO tr
GN trZR tr
95P0526015.0-30.0Btg1csi 91QZ 83FK 8CD 5PR 1FE 1OP 1
TM 1RU trGN trHN trPO trZR tr
CA trBT trZE tr
95P0526130.0-48.0Btg2csi 87QZ 78FK 9CD 5PR 2OP 2FE 1
FP 1MS 1RU 1TM trZR trGN tr
GO trPO tr
95P0526248.0-71.0Btg3csi 86QZ 76FK 11CD 6OP 3PR 2FE 1
ZE 1GN trMS trTM trZR trHN tr
RU tr
95P0526371.0-97.0Btg4fs 93QZ 87FK 6CD 3FE 3BT 1HN tr


*** Primary Characterization Data ***
Pedon ID: S1995IA107011( Keokuk, Iowa )Print Date: Jan 8 2026 4:56PM
Sampled As:BUCKNELLMontmorillonitic Mollic Epiaqualfs
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  95P0828
Sand - Silt Mineralogy (2.0-0.002 mm)-1--2--3--4--5--6--7--8--9--10--11--12--13--14--15--16--17--18-
X-RayThermalOpticalEGMEInter
Tot ReGrain CountRetnpreta
DepthFract 7B1a2 tion
Layer(cm)Horzion( - - - - - - - - peak size - - - - - - - - - )(- - - - - - - - % - - - - - - - - - -)(- - - - - - - - - - - - - - - - - - - - % - - - - - - - - - - - - - - - - - -) mg g-1
FP trPR tr
95P0526497.0-137.0BCgfs 89QZ 84FK 10FE 3CD 1OP 1PR 1
FP tr
95P05265137.0-157.0Cg1fs 94QZ 89FK 5FE 4CD 1PR trMS tr
ZE trFP trHN tr
95P05266157.0-196.0Cg2fs 93QZ 90FK 7FE 1CD 1OP 1FP tr
HN tr
95P05267196.0-244.0Cg3fs 90QZ 86FK 9CD 2FE 1BT 1OP 1
PR trGN trFP tr

FRACTION INTERPRETATION:
csi - Coarse Silt 0.02-0.05 mmfs - Fine Sand 0.1-0.25 mm

MINERAL INTERPRETATION:
BT BiotiteCA CalciteCD Chert (ChalcedonyFE Iron Oxides (GoethiteFK Potassium Feldspar
FP Plagioclase FeldsparGN GarnetGO GlaucophaneHN HornblendeMS Muscovite
OP OpaquesPO Plant OpalPR PyroxeneQZ QuartzRU Rutile
TM TourmalineZE ZeoliteZR Zircon
NSSC SSL Report Creation