IDENTIFIERS

  • Current Taxon Name (Soil Name): Conroe
  • OSD
  • Series Extent
  • User Site ID: S1964TX339005
  • User Pedon ID: S1964TX339005
  • Vegetation Plot ID: S1964TX339005
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 40A4547
  • NCSS Pedon Lab Data NASIS Record ID - 40699
  • Print Date: 10/31/2024
  • 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: 30.4011116
  • Std. Longitude: -95.4111099
  • Datum: WGS84
  • Location Description: About 4-1/2 miles S-SE of Willis, TX; 60 feet E of private road and 1/4 mile NE of its intersection with FM Road 2432, which is 4.4 miles SE of intersection of FM Road 2432 and US Highway 75 at Willis, TX; NW part of photo AWU-9W-170.
  • State: Texas
  • County: TX339—Montgomery
  • MLRA: 133B—Western Coastal Plain
  • Non-MLRA Soil Survey Area: TX339—Montgomery County, Texas
  • PEDON

  • Describers Name: G. S. McKee and H. Oakes
  • Current Taxonomic Class: Clayey, kaolinitic, thermic Arenic Plinthic Paleudults
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 5
  • Correlated Information:
  • Soil Name - Conroe (flagged as OSD)
  • PSC - 64 to 114 cm.
  • Classificaton Date - 9/29/2014
  • Classifier - Ricky E. Lambert
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - udic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Conroe (flagged as OSD)
  • Taxonomic Class - Clayey, kaolinitic, thermic Arenic Plinthic Paleudults
  • Taxon Kind - series
  • PSC - 64 to 114 cm.
  • Classificaton Date - 5/13/1964
  • Classifier - G.S. McKee and H. Oaks
  • Moisture Class - udic
  • Moisture SUBClass - typic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: level 1


  • SITE

  • Landform: ridge
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Runoff: low
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no
  • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/13/1964 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - intermixed conifers and hardwoods
  • 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 % % % % % % % % % % % % %

    A

    E1

    E2

    Bt

    Btv1

    Btv2

    Btv3

    Btv4

    Btv5

    BCtv

    0

    10

    36

    64

    79

    97

    119

    145

    173

    198

    10

    36

    64

    79

    97

    119

    145

    173

    198

    244

    40A34719

    40A34720

    40A34721

    40A34722

    40A34723

    40A34724

    40A34725

    40A34726

    40A34727

    40A34728

    KSSL

    KSSL

    KSSL

    KSSL

    KSSL

    KSSL

    KSSL

    KSSL

    KSSL

    KSSL

    3.2

    4.1

    6.7

    39.8

    44.1

    43.4

    44.2

    49.2

    45.4

    33.5

    17

    12.2

    15.1

    13.7

    13.5

    12.1

    11.2

    8.1

    6.4

    4.7

    6.2

    5.7

    6.1

    7.6

    7.5

    7

    6.3

    6

    5.1

    4.1

    10.8

    6.5

    9

    6.1

    6

    5.1

    4.9

    2.1

    1.3

    0.6

    79.6

    83.7

    78.2

    46.5

    42.4

    44.5

    44.6

    42.7

    48.2

    61.8

    sieves

    sieves

    sieves

    sieves

    sieves

    sieves

    sieves

    sieves

    sieves

    sieves

    1.4

    2.5

    3.4

    2.1

    2.8

    3.5

    1.8

    1.2

    0.2

    0

    8

    7.5

    7.2

    4.9

    5.2

    5.9

    6

    2.6

    1.2

    1.3

    13.3

    12.7

    12.2

    8.1

    7.4

    7.6

    7.5

    3.4

    5.2

    14.2

    34.1

    40

    35.2

    19.7

    16.4

    16.7

    17.9

    22.2

    31.3

    42.1

    23

    21

    20.2

    11.7

    10.6

    10.8

    11.4

    13.3

    10.3

    4.2

    270 mesh sieve

    270 mesh sieve

    270 mesh sieve

    270 mesh sieve

    270 mesh sieve

    270 mesh sieve

    270 mesh sieve

    270 mesh sieve

    270 mesh sieve

    270 mesh sieve

    lfs

    lfs

    lfs

    sc

    c

    c

    c

    c

    sc

    scl

    4.5

    5

    4.9

    4.6

    4.6

    4.4

    4.3

    4.3

    4.4

    4.4

    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

    A

    E1

    E2

    Bt

    Btv1

    Btv2

    Btv3

    Btv4

    Btv5

    BCtv

    0

    10

    36

    64

    79

    97

    119

    145

    173

    198

    10

    36

    64

    79

    97

    119

    145

    173

    198

    244

    40A34719

    40A34720

    40A34721

    40A34722

    40A34723

    40A34724

    40A34725

    40A34726

    40A34727

    40A34728

    0.01

    0.01

    0.02

    0.01

    0.01

    0.01

    0.01

    1.7

    0.6

    0.7

    2.7

    1.9

    2.1

    1.7

    1.5

    1.3

    0.7

    4.1

    1.6

    1.4

    7.2

    7.9

    7.7

    7.3

    6.9

    6.7

    4.4

    29

    27

    33

    27

    19

    21

    19

    18

    16

    14

    5.8

    2.2

    2.1

    9.9

    9.8

    9.8

    9

    8.4

    8

    5.1

    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 %

    A

    E1

    E2

    Bt

    Btv1

    Btv2

    Btv3

    Btv4

    Btv5

    BCtv

    0

    10

    36

    64

    79

    97

    119

    145

    173

    198

    10

    36

    64

    79

    97

    119

    145

    173

    198

    244

    40A34719

    40A34720

    40A34721

    40A34722

    40A34723

    40A34724

    40A34725

    40A34726

    40A34727

    40A34728

    2.4

    1.1

    1.2

    5.1

    4.9

    5.2

    4.4

    4.9

    4.5

    3.1

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

    ILVO

    MOCE2

    MOCE2

    PIEC2

    PITA

    Ilex vomitoria

    Morella cerifera

    Morella cerifera

    Pinus echinata

    Pinus taeda

    yaupon

    wax myrtle

    wax myrtle

    shortleaf pine

    loblolly pine

    Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    plinthite

    strongly coherent

    79 - 244

    - 165 -

    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    plinthite

    redox depletions with chroma 2 or less

    0—31

    31—198

    79—244

    97—198

    —31—

    —167—

    —165—

    —101—

    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

    88

    A—0 to 10 centimeters (0.0 to 3.9 inches); grayish brown (10YR 5/2), light gray (10YR 7/2), dry; gravelly loamy fine sand; structureless single grain; loose, very friable, nonsticky, nonplastic; many (16.0) medium roots throughout and many (5.0) coarse roots throughout; 17 percent by volume nonflat subrounded strongly coherent cemented 5-10-20 millimeter ironstone nodules fragments observed by weighed method; very strongly acid, pH 4.5, pH meter; clear smooth boundary. Lab sample # 40A34719
    E1—10 to 36 centimeters (3.9 to 14.2 inches); light yellowish brown (10YR 6/4), very pale brown (10YR 7/4), dry; very gravelly loamy fine sand; structureless single grain; loose, loose, nonsticky, nonplastic; many (21.0) medium roots throughout; 43 percent by volume nonflat subrounded strongly coherent cemented 5-10-20 millimeter ironstone nodules fragments observed by weighed method; very strongly acid, pH 5.0, pH meter; gradual wavy boundary. Lab sample # 40A34720. It seems that the amount of concretions gradually increases with depth.
    E2—36 to 64 centimeters (14.2 to 25.2 inches); light yellowish brown (10YR 6/4), very pale brown (10YR 7/4), dry; very gravelly loamy fine sand; structureless single grain; loose, loose, nonsticky, nonplastic; many (5.0) medium roots throughout and moderately few (5.0) coarse roots throughout; 43 percent by volume nonflat subrounded strongly coherent cemented 5-10-20 millimeter ironstone nodules fragments observed by weighed method; very strongly acid, pH 4.9, pH meter; clear irregular boundary. Lab sample # 40A34721. This layer divided from the A21 for sampling purposes.
    Bt—64 to 79 centimeters (25.2 to 31.1 inches); yellowish brown (10YR 5/6), brownish yellow (10YR 6/6), dry; gravelly sandy clay; 3 percent red (2.5YR 4/6) fine prominent irregular and 3 percent red (2.5YR 4/6) medium prominent irregular and 3 percent yellowish red (5YR 5/6) medium prominent irregular and 3 percent yellowish red (5YR 5/6) fine prominent irregular mottles; moderate fine subangular blocky structure; hard, firm, slightly sticky, slightly plastic; common (2.0) medium roots throughout and common (2.0) coarse roots throughout; 0.5 fine moderate-continuity tubular pores; 10 percent faint yellowish brown (10YR 5/6), moist, clay films on all faces of peds; 20 percent by volume nonflat subrounded strongly coherent cemented 5-10-20 millimeter ironstone nodules fragments observed by weighed method; very strongly acid, pH 4.6, pH meter; gradual wavy boundary. Lab sample # 40A34722. Insides of some of the mottles are slightly cemented dark red incipient iron concretions.
    Btv1—79 to 97 centimeters (31.1 to 38.2 inches); yellowish brown (10YR 5/6), yellow (10YR 7/6), dry; clay; 21 percent red (2.5YR 4/6) coarse prominent irregular and 21 percent red (2.5YR 4/6) medium prominent irregular mottles; moderate medium subangular blocky structure; extremely hard, firm, slightly sticky, slightly plastic; few (0.5) medium roots between peds and few (0.5) coarse roots throughout; few (0.5) fine moderate-continuity tubular pores; 60 percent distinct yellowish brown (10YR 5/6), moist, clay films on all faces of peds; 30 percent medium prominent irregular weakly coherent cemented red (2.5YR 4/6), moist, plinthite nodules with sharp boundaries in matrix; 10 percent by volume nonflat subrounded strongly coherent cemented 5-10-20 millimeter ironstone nodules fragments observed by weighed method; very strongly acid, pH 4.6, pH meter; gradual wavy boundary. Lab sample # 40A34723. The mottles are weakly cemented and some have slightly cemented iron concretions in their centers; they are not connected or bridged together.
    Btv2—97 to 119 centimeters (38.2 to 46.9 inches); 30 percent yellow (10YR 7/6), 40 percent red (2.5YR 4/8) and 30 percent red (10R 4/8), dry; clay; moderate coarse subangular blocky parts to moderate fine and medium subangular blocky structure; extremely hard, firm, moderately sticky, moderately plastic; few (1.0) fine roots throughout; few (1.0) fine moderate-continuity tubular pores; 60 percent distinct brownish yellow (10YR 6/6), moist, clay films on all faces of peds; 40 percent medium prominent irregular weakly coherent cemented red (2.5YR 4/6), moist, plinthite nodules with sharp boundaries in matrix; 4 percent by volume nonflat subrounded strongly coherent cemented 5-10-20 millimeter ironstone nodules fragments observed by weighed method; extremely acid, pH 4.4, pH meter; diffuse wavy boundary. Lab sample # 40A34724. Many of the coarse red mottles are bridged together; a few roots penetrate through the thinner parts of the red mottles and through the unbridged, uncemented parts of the yellow and light brownish gray soil and tend to cluster in the uncemented part.
    Btv3—119 to 145 centimeters (46.9 to 57.1 inches); 30 percent yellow (10YR 7/6), 40 percent red (2.5YR 4/8) and 30 percent dark yellowish brown (10YR 4/6), dry; clay; 1 percent mottles; moderate coarse subangular blocky parts to moderate fine and medium subangular blocky structure; extremely hard, firm, moderately sticky, moderately plastic; few (0.5) fine roots throughout; few (1.0) fine moderate-continuity tubular pores; 50 percent prominent brownish yellow (10YR 6/6), moist, clay films on all faces of peds; 40 percent medium prominent irregular weakly coherent cemented red (2.5YR 4/6), moist, plinthite nodules with sharp boundaries in matrix; 4 percent by volume nonflat subrounded strongly coherent cemented 5-10-20 millimeter ironstone nodules fragments observed by weighed method; extremely acid, pH 4.3, pH meter; diffuse wavy boundary. Lab sample # 40A34725. Has more horizontal streaks of light brownish gray and some white, mostly horizontal streaks, and a few pinkish mottles than horizon above; very few roots penetrate the reddish slightly cemented red mottles; some of the gray more clayey streaks are vertical through the red, coarse, slightly cemented mottles; roots are mostly in the gray soil material.
    Btv4—145 to 173 centimeters (57.1 to 68.1 inches);, 40 percent red (2.5YR 4/8) and 30 percent red (10R 4/8) and 30 percent yellow (10YR 7/6), dry; clay; 1 percent mottles; moderate coarse subangular blocky parts to moderate fine and medium subangular blocky structure; extremely hard, firm, moderately sticky, moderately plastic; few (0.5) fine roots throughout; few (0.5) fine moderate-continuity tubular pores; 40 percent prominent brownish yellow (10YR 6/6), moist, clay films on faces of peds; 40 percent medium prominent irregular weakly coherent cemented red (2.5YR 4/6), moist, plinthite nodules with sharp boundaries in matrix; 1 percent by volume nonflat subrounded strongly coherent cemented 5-10-20 millimeter ironstone nodules fragments observed by weighed method; extremely acid, pH 4.3, pH meter; diffuse wavy boundary. Lab sample # 40A34726. Similar to above horizon but more evidence of old bedding planes. The gray streaks are more clayey; some of the gray horizontal streaks are continuous for more than 10'; some gray streaks are vertical; both vertical and horizontal streaks are 1/8-1"""" thick.; continuous - phpvsfiid 1159086; continuous - phpvsfiid 1159086
    Btv5—173 to 198 centimeters (68.1 to 78.0 inches);, reddish yellow (7.5YR 6/8) and red (10R 4/8), dry; sandy clay; coarse prominent mottles; moderate coarse subangular blocky structure; extremely hard, firm, moderately sticky, moderately plastic; few (0.5) fine roots throughout; few (0.5) fine moderate-continuity tubular pores; 40 percent prominent reddish yellow (7.5YR 6/8), moist, clay films on all faces of peds; 5 percent medium prominent irregular noncoherent cemented light gray (10YR 7/1), moist, masses of reduced iron with clear boundaries infused into matrix along faces of peds and 40 percent medium prominent irregular weakly coherent cemented red (2.5YR 4/6), moist, plinthite nodules with sharp boundaries in matrix; 1 percent by volume nonflat subangular very strongly coherent cemented 5-10-20 millimeter ironstone nodules fragments observed by weighed method; extremely acid, pH 4.4, pH meter; gradual wavy boundary. Lab sample # 40A34727
    BCtv—198 to 244 centimeters (78.0 to 96.1 inches);, 25 percent weak red (10R 5/4) and 25 percent red (2.5YR 4/8) and 25 percent red (10R 4/8) and 25 percent very pale brown (10YR 7/4), dry; sandy clay loam; 1 percent coarse distinct mottles; weak very coarse subangular blocky structure; extremely hard, firm, slightly sticky, slightly plastic; few (0.5) fine roots between peds; few (0.5) medium low-continuity tubular and few (0.5) coarse low-continuity tubular pores; 10 percent prominent very pale brown (10YR 7/4), moist, clay films on top faces of peds; 35 percent medium prominent irregular weakly coherent cemented red (2.5YR 4/6), moist, plinthite nodules with sharp boundaries in matrix; fragments; extremely acid, pH 4.4, pH meter. Lab sample # 40A34728