IDENTIFIERS

Current Taxon Name (Soil Name): Zack

OSD

Series Extent

User Site ID: S2002TX041001

User Pedon ID: S2002TX041001

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - TAMU

Lab Pedon # - S78TX041001

NCSS Pedon Lab Data NASIS Record ID - 45646

Print Date: 2/16/2025

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: 30.6110001

Std. Longitude: -96.3481674

Datum: WGS84

Location Description: West campus, Texas A&M University, 250 feet northwest of Kleberg Animal and Food Science Building.

Map Unit: Ur—Urban land

Country: US—United States

State: Texas

County: TX041—Brazos

MLRA: 87A—Texas Claypan Area, Southern Part

Regional Office: SC—South Central

Non-MLRA Soil Survey Area: TX041—Brazos County, Texas

PEDON

Describers Name: L.Wilding, B.L.Harris, T.Sobecki, K.Kacy

Current Taxonomic Class: Fine, smectitic, thermic Udertic Paleustalfs

Current Taxon Kind: series

Pedon Type: classifies to current taxon name, full description

Pedon Purpose: full pedon description

Pedon Record Orgin: 2002 Brazos County Soil Survey

Correlated Information:

Soil Name - Zack

PSC - 13 to 63 cm.

Classificaton Date - 5/21/2012

Moisture Class - udic

Moisture Subclass - ustic

Sampled As Information:

Soil Name - Crockett taxadjunct

Classificaton Date - 1/1/1978

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: alluvium

Landscape: upland

Runoff: very high

Drainage Class: moderately well

Geology: Yegua formation.

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 1/1/1978 (actual site observation date)

Air Photo ID: AS-32

Surface Cover Properties:

Site Obs. Cover Kind 1 - grass/herbaceous cover

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
ochric epipedon argillic horizon abrupt textural change secondary carbonates salt accumulations densic materials	0—13 13—160 13—13 84—127 97—160 160—241	—- —- —- —- —- —-

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
—	—	—	—	—		—	—	—	—	—	—	—	—	—	—	—	—	—	—

A—0 to 13 centimeters (0.0 to 5.1 inches); grayish brown (10YR 5/2), very dark grayish brown (10YR 3/2), moist; fine sandy loam; massive; extremely hard, friable; 3.0 fine roots; 5 percent by volume nonflat rounded indurated ? to 2-? millimeter chert fragments; clear wavy boundary. Lab sample # TAMU501; observed in trench

Bt1—13 to 46 centimeters (5.1 to 18.1 inches); brown (10YR 5/3), dark grayish brown (10YR 4/2), moist; clay; moderate very coarse prismatic parts to moderate coarse subangular blocky structure; extremely hard, very friable; 2 percent slickensides (pedogenic) and 5 percent faint clay films on faces of peds; 10 percent fine prominent red (2.5YR 4/8), moist, masses of oxidized iron and 10 percent fine distinct strong brown (7.5YR 5/8), moist, masses of oxidized iron; 5 percent by volume nonflat rounded indurated ? to 2-? millimeter chert fragments; clear wavy boundary. Lab sample # TAMU502; observed in trench

Bt2—46 to 84 centimeters (18.1 to 33.1 inches); pale olive (5Y 6/3), olive (5Y 5/3), moist; clay; moderate very coarse prismatic parts to moderate coarse angular blocky structure; extremely hard, very friable; 2 percent faint clay films on faces of peds and 10 percent slickensides (pedogenic); 10 percent fine prominent brownish yellow (10YR 6/8), moist, masses of oxidized iron and 10 percent 10YR 1 (10YR1), moist, manganese masses; 10 percent dark concretions; 5 percent by volume nonflat rounded indurated ? to 2-? millimeter chert fragments; clear wavy boundary. Lab sample # TAMU503; observed in trench. discontinuous - phpvsfiid 332212; discontinuous - phpvsfiid 332212

Btk—84 to 97 centimeters (33.1 to 38.2 inches);, olive (5Y 5/3), moist; clay; moderate coarse angular blocky structure; extremely hard, very friable; 10 percent slickensides (pedogenic); 10 percent fine prominent brownish yellow (10YR 6/8), moist, masses of oxidized iron and 10 percent fine black (10YR 2/1), moist, manganese masses; 5 percent by volume nonflat rounded indurated ? to 2-? millimeter chert fragments; clear wavy boundary. Lab sample # TAMU504; observed in trench

Btky—97 to 127 centimeters (38.2 to 50.0 inches);, olive (5Y 5/3), moist; clay; moderate coarse prismatic parts to moderate coarse subangular blocky structure; extremely hard, very friable; 15 percent slickensides (pedogenic); 10 percent fine prominent brownish yellow (10YR 6/8), moist, masses of oxidized iron and 10 percent fine black (10YR 2/1), moist, manganese masses; 10 percent carbonate concretions; fragments; clear smooth boundary. Lab sample # TAMU505; observed in trench

Bty—127 to 160 centimeters (50.0 to 63.0 inches);, olive (5Y 5/3), moist; clay loam; weak coarse subangular blocky structure; extremely hard, very friable; 5 percent faint clay films on faces of peds; 2 percent fine black (10YR 2/1), moist, manganese masses and 10 percent fine prominent brownish yellow (10YR 6/8), moist, masses of oxidized iron; 1 percent dark concretions; fragments; clear smooth boundary. Lab sample # TAMU506; observed in trench

Cd1—160 to 191 centimeters (63.0 to 75.2 inches);, olive gray (5Y 5/2), moist; sandy clay; 10 percent yellowish brown (10YR 5/6) prominent mottles; hard, firm; fragments; gradual smooth boundary. Lab sample # TAMU507; observed in trench

Cd2—191 to 241 centimeters (75.2 to 94.9 inches);, olive gray (5Y 5/2), moist; sandy clay; 10 percent yellowish brown (10YR 5/8) prominent mottles; hard, firm; manganese or iron-manganese stains; fragments. Lab sample # TAMU508; observed in trench