IDENTIFIERS

Current Taxon Name (Soil Name): Houston Black

OSD

Series Extent

User Site ID: S78TX027005

User Pedon ID: S78TX027005

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - TAMU

Lab Pedon # - S78TX027005

NCSS Pedon Lab Data NASIS Record ID - 45641

Print Date: 11/21/2024

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: 31.0449715

Std. Longitude: -97.3476944

Datum: WGS84

Location Description: Approximately 2 miles south of Temple in native pasture in south part of the Blackland Research Center.

Map Unit: HoB—Houston Black clay, 1 to 3 percent slopes

Country: US—United States

State: Texas

County: TX027—Bell

MLRA: 86A—Texas Blackland Prairie, Northern Part

Regional Office: SC—South Central

Non-MLRA Soil Survey Area: TX027—Bell County, Texas

PEDON

Describers Name: Wilding, Rivers and Ramsey

Current Taxonomic Class: Fine, smectitic, thermic Udic Haplusterts

Current Taxon Kind: series

Pedon Type: classifies to current taxon name, full description

Pedon Purpose: full pedon description

Pedon Record Orgin: PedonPC

Correlated Information:

Soil Name - Houston Black

PSC - 25 to 100 cm.

Classificaton Date - 6/4/2012

Moisture Class - udic

Moisture Subclass - ustic

Sampled As Information:

Soil Name - Houston Black

Classificaton Date - 10/10/1978

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Hydric: no

Certification Status: certified

QC Status: level 1

QA Status: level 1

SITE

Parent Material: marl

Landscape: upland

Runoff: very high

Drainage Class: moderately well

Bedrock: shale, calcareous at 363cm

Geology: Lower Taylor Marl group .

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 10/10/1978 (actual site observation date)

Surface Cover Properties:

Site Obs. Cover Kind 1 - grass/herbaceous cover

Site Obs. Cover Kind 2 - rangeland, grassland

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
mollic epipedon slickensides secondary carbonates salt accumulations densic materials	0—76 76—218 140—363 363—371 363—371	—- —- —- —- —-

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	—	—	183	—	95	—	—	—	—	—	—	—	—	—	—	—	—	—	—

A—0 to 76 centimeters (0.0 to 29.9 inches); very dark gray (10YR 3/1), black (10YR 2/1), moist; clay; moderate fine subangular blocky, and moderate fine angular blocky structure; extremely hard, very friable; 3.0 fine roots; 1 percent fine black (10YR 2/1), moist, iron-manganese concretions; fragments; slight effervescence; moderately alkaline, pH 8.0; gradual smooth boundary. Lab sample # TAMU354, TAMU356, TAMU355

Bss1—76 to 140 centimeters (29.9 to 55.1 inches); very dark gray (10YR 3/1), black (10YR 2/1), moist; clay; moderate fine and medium angular blocky structure; extremely hard, very friable; 1.0 fine roots; 20 percent slickensides (pedogenic); 1 percent fine black (10YR 2/1), moist, iron-manganese concretions; fragments; strong effervescence; moderately alkaline, pH 8.0; gradual wavy boundary. Lab sample # TAMU357, TAMU361

Bss2—140 to 183 centimeters (55.1 to 72.0 inches); grayish brown (10YR 5/2), dark grayish brown (10YR 4/2), moist; clay; weak fine and medium angular blocky structure; extremely hard, very friable; 1.0 fine roots; 20 percent slickensides (pedogenic); 1 percent fine black (10YR 2/1), moist, iron-manganese concretions and 2 percent fine faint brownish yellow (10YR 6/6), moist, masses of oxidized iron; 1 percent fine carbonate concretions; fragments; strong effervescence; moderately alkaline, pH 8.0; gradual wavy boundary. Lab sample # TAMU362

BCss—183 to 218 centimeters (72.0 to 85.8 inches); light brownish gray (10YR 6/2), grayish brown (10YR 5/2), moist; clay; weak medium angular blocky structure; extremely hard, very friable; 1.0 fine roots; 15 percent slickensides (pedogenic); 1 percent fine black (10YR 2/1), moist, iron-manganese concretions and 2 percent fine faint brownish yellow (10YR 6/6), moist, masses of oxidized iron; 1 percent fine carbonate concretions; fragments; strong effervescence; moderately alkaline, pH 8.0; gradual wavy boundary. Lab sample # TAMU363

C—218 to 284 centimeters (85.8 to 111.8 inches); very pale brown (10YR 7/3), pale brown (10YR 6/3), moist; clay; massive; extremely hard, very friable; 1 percent fine black (10YR 2/1), moist, iron-manganese concretions and 2 percent fine faint brownish yellow (10YR 6/6), moist, masses of oxidized iron; 1 percent threadlike carbonate masses and 1 percent fine carbonate concretions and 1 percent fine root sheaths; fragments; strong effervescence; moderately alkaline, pH 8.0; gradual wavy boundary. Lab sample # TAMU364

Ck—284 to 363 centimeters (111.8 to 142.9 inches); very pale brown (10YR 8/3), very pale brown (10YR 7/3), moist; clay; massive; extremely hard, very friable; 1 percent fine black (10YR 2/1), moist, iron-manganese concretions and 2 percent fine faint brownish yellow (10YR 6/8), moist, masses of oxidized iron; 1 percent threadlike carbonate masses and 1 percent fine carbonate concretions and 1 percent fine root sheaths; fragments; strong effervescence; moderately alkaline, pH 8.0; clear wavy boundary. Lab sample # TAMU368, TAMU369

Cd—363 to 371 centimeters (142.9 to 146.1 inches);, brownish yellow (10YR 6/6), moist; clay; massive; extremely hard, extremely firm; 20 percent fine and medium distinct very pale brown (10YR 7/3), moist, masses of oxidized iron; 1 percent fine salt masses; fragments; strong effervescence; moderately alkaline, pH 8.0.