*** Primary Characterization Data ***
Pedon ID: 91CO123007( Weld, Colorado )Print Date: Feb 16 2025 5:24AM

Sampled as on Jun 29, 1991:Ulm ; Fine, montmorillonitic Ustollic Haplargids
Revised to correlated on Sep 1, 1992:(unnamed) ; Fine-loamy, mixed, superactive, mesic Ustollic Haplargid
United States Department of Agriculture
SSL-ProjectCP91CO201   WELDNatural Resources Conservation Service
-Site IDS1991CO123007   Lat: 40° 49' 41.00" north  Long: 104° 47' 9.01" west  MLRA: 67National Soil Survey Center
-Pedon No. 91P0871Soil Survey Laboratory
-General Methods 1B1A, 2A1, 2BLincoln, Nebraska 68508-3866
LayerHorizonOrig HznDepth (cm)Field Label 1Field Label 2Field Label 3Field TextureLab Texture
 
91P05282A1A10-5FSL FSL
91P05283A2A25-14FSL FSL
91P05284BABA14-28L SCL
91P05285Bt1Bt128-39CL SCL
91P05286Bt2Bt239-67CL CL
91P05287BCkBCk67-88SCL CL
91P052882CBk2CBk88-130LS FSL
Pedon Calculations
Calculation NameResultUnits of Measure
 
CEC Activity, CEC7/Clay, Weighted Average0.75(NA)
Clay, carbonate free, Weighted Average34% wt
Weighted Particles, 0.1-75mm, 75 mm Base24% wt
Volume, >2mm, Weighted Average2% vol
Clay, total, Weighted Average34% wt
LE, Whole Soil, Summed to 1m4cm/m
 
Weighted averages based on control section: 28-67 cm
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
 
91P052820-5A1Sfsl8.419.172.55.68.610.528.131.47.62.23.293--5112
91P052835-14A2Sfsl11.917.670.57.77.79.927.232.75.61.83.286--5114
91P0528414-28BASscl22.217.460.415.38.58.922.928.36.51.31.432--415
91P0528528-39Bt1Sscl30.418.251.422.29.78.521.323.65.40.70.442--356
91P0528639-67Bt2Scl34.830.534.720.919.111.417.913.12.60.50.621--193
91P0528767-88BCkScl33.533.433.111.620.812.615.715.61.50.20.1------17
91P0528888-1302CBkSfsl12.79.178.25.77.12.03.851.622.60.10.11tr--751


*** Primary Characterization Data ***
Pedon ID: 91CO123007( Weld, Colorado )Print Date: Feb 16 2025 5:24AM
Sampled As:UlmFine, montmorillonitic Ustollic Haplargids
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  91P0871
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%
4A1d4A1h4B1c4B1c3C2a1a3D14C18D18D1
 
91P052820-5A1S1.241.310.01716.716.34.11.0090.141.020.49
91P052835-14A2S1.581.670.01716.716.05.61.0110.150.780.47
91P0528414-28BAS1.481.620.03018.717.89.21.0220.120.680.41
91P0528528-39Bt1S1.471.650.03817.813.61.0320.060.690.45
91P0528639-67Bt2S1.551.830.05623.513.41.0370.150.780.39
91P0528767-88BCkS1.661.860.03919.214.41.0380.080.900.43
91P0528888-1302CBkS1.651.660.00214.07.61.0180.101.130.60
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
 
91P052820-5A1S6.6
91P052835-14A2S7.1
91P0528414-28BAS11.6
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 - - - - -)
6A2d6A1c6C2b6G7a6D2a8J6C9b6G12b6V2b6D5b6C8a6G10
 
91P052820-5A1S0.861.000.9trtr0.050.020.030.030.02112.40.1--
91P052835-14A2S0.510.541.0trtr0.050.020.030.040.0397.30.1tr
91P0528414-28BAS0.590.600.80.1tr0.080.020.040.060.0378.30.10.1
91P0528528-39Bt1S0.500.500.80.1tr0.110.030.040.090.0459.70.10.1
91P0528639-67Bt2S0.380.360.4trtr0.090.020.030.070.04--0.1--
91P0528767-88BCkS0.180.150.9tr0.10.040.020.020.040.031674.8----
91P0528888-1302CBkS0.080.050.3trtr0.020.02tr0.020.02166.3----


*** Primary Characterization Data ***
Pedon ID: 91CO123007( Weld, Colorado )Print Date: Feb 16 2025 5:24AM
Sampled As:UlmFine, montmorillonitic Ustollic Haplargids
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  91P0871
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 - - -)(- - - - - - - - % - - - - - - - -)
6N2e6O2d6P2b6Q2b6H5a5A3a5A8b5C35C1
 
91P052820-5A1S5.32.00.10.57.92.710.68.67592
91P052835-14A2S6.52.30.10.39.21.210.49.38899
91P0528414-28BAS10.34.10.10.314.82.917.715.08499
91P0528528-39Bt1S14.4*6.40.20.521.52.824.321.088100
91P0528639-67Bt2S18.9*9.10.30.428.72.331.027.193100
91P0528767-88BCkS23.0*10.90.40.41.330.096100
91P0528888-1302CBkS13.8*5.20.30.219.50.419.914.498100

*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 - -)%
6N1b6O1b6P1b6Q1b6I1b6J1b6U1a6K1c6L1c6W1a6M1c8A8D58A3a4F1a1a15E
 
91P052820-5A1S0.091
91P052835-14A2S0.081
91P0528414-28BAS0.071
91P0528528-39Bt1S0.081
91P0528639-67Bt2S0.131
91P0528767-88BCkS4.72.71.70.1--2.50.20.45.60.10.148.5tr0.780.3111
91P0528888-1302CBkS0.202


*** Primary Characterization Data ***
Pedon ID: 91CO123007( Weld, Colorado )Print Date: Feb 16 2025 5:24AM
Sampled As:UlmFine, montmorillonitic Ustollic Haplargids
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  91P0871
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
4C1a2a4C1a2a8C1b6E1g4E2a1a1a1
 
91P052820-5A1S5.56.1
91P052835-14A2S6.16.6
91P0528414-28BAS5.96.5
91P0528528-39Bt1S6.36.9
91P0528639-67Bt2S7.07.5
91P0528767-88BCkS7.67.97.3tr--
91P0528888-1302CBkS7.88.2


*** Primary Characterization Data ***
Pedon ID: 91CO123007( Weld, Colorado )Print Date: Feb 16 2025 5:24AM
Sampled As:UlmFine, montmorillonitic Ustollic Haplargids
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  91P0871
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 7C3 tion
Layer(cm)Horzion( - - - - - - - - - peak size - - - - - - - - - - )(- - - - - - - - - % - - - - - - - - - -)(- - - - - - - - - - - - - - - - - - - - - % - - - - - - - - - - - - - - - - - - - - -)mg g-1
91P0528528.0-39.0Bt1tclyMT 4KK 3MI 3QZ 2 236.0 1.6
91P0528639.0-67.0Bt2tclyMT 5KK 3MI 2QZ 2MM 1 235.1 1.1

FRACTION INTERPRETATION:
tcly - Total Clay <0.002 mm

MINERAL INTERPRETATION:
KK KaoliniteMI MicaMM Montmorillonite-MicaMT MontmorilloniteQZ Quartz

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


*** Primary Characterization Data ***
Pedon ID: 91CO123007( Weld, Colorado )Print Date: Feb 16 2025 5:24AM
Sampled As:UlmFine, montmorillonitic Ustollic Haplargids
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  91P0871
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
91P052820.0-5.0A1fs OT 99
91P052835.0-14.0A2fs OT 99
91P0528414.0-28.0BAfs OT 99
91P0528767.0-88.0BCkvfs OT 99
91P0528888.0-130.02CBkfs OT 99

FRACTION INTERPRETATION:
vfs - Very Fine Sand 0.05-0.1 mmfs - Fine Sand 0.1-0.25 mm

MINERAL INTERPRETATION:
OT Other



*** Primary Characterization Data ***
Pedon ID: 91CO123007( Weld, Colorado )Print Date: Feb 16 2025 5:24AM
Sampled As:UlmFine, montmorillonitic Ustollic Haplargids
USDA-NRCS-NSSC-Soil Survey Laboratory;Pedon No.  91P0871
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
91P0528528.0-39.0Bt1fs 67QZ 64OT 15FK 14RA 3FD 2FP 1
CL trOP trCD trAM trGS tr
91P0528639.0-67.0Bt2vfs 81QZ 79FK 10OT 5FD 2CD 1RA 1
PR 1TM trZR trGS trGN trFP tr
MS trBT trOP trAM tr

FRACTION INTERPRETATION:
vfs - Very Fine Sand 0.05-0.1 mmfs - Fine Sand 0.1-0.25 mm

MINERAL INTERPRETATION:
AM AmphiboleBT BiotiteCD Chert (ChalcedonyCL ChloriteFD Feldspar
FK Potassium FeldsparFP Plagioclase FeldsparGN GarnetGS GlassMS Muscovite
OP OpaquesOT OtherPR PyroxeneQZ QuartzRA Resistant Aggregates
TM TourmalineZR Zircon
NSSC SSL Report Creation