Acuff 1
Location: Parmer County, Texas; in a cultivated field 700 feet west of unpaved county road, 0.6 mi north of 2.7 mi west of US highway 60, 0.9 mi northeast of its intersection with Farm Road 292 in Farwell. Latitude 34^o 24’N, Longitude 103^o 5’W. Unger et al. 1993.

Ap—0 to 8 inches; brown (7.5YR 4/2) loam, dark brown (7.5YR 3/2) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common fine and medium pores; neutral; abrupt smooth boundary.

Bt1—8 to 20 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; very hard, very firm; common fine roots; few fine pores; thin continuous clay films; neutral; gradual smooth boundary.

Bt2—20 to 33 inches; reddish brown (5YR 5/4) clay, reddish brown (5YR 4/4) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—33 to 45 inches; yellowish red (5YR 5/6) clay loam, yellowish red (5YR 4/6) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads, films, small concretions of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Btk—45 to 86 inches; pink (5YR 8/4) clay; pink (5YR 8/4) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 57% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 2
Location: Castro County, Texas; in a cultivated field 800 feet west of unpaved county road, 0.9 mi south of Farm Road 303, 1.0 mi east of Dodd. Latitude 34^o 19’N, Longitude 102^o 27’W. Unger et al. 1993.

Ap—0 to 9 inches; reddish brown (5YR 4/4) clay loam, dark reddish brown (5YR 3/4) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common fine and medium pores; neutral; abrupt smooth boundary.

Bt1—9 to 19 inches; reddish brown (5YR 5/4) clay loam, reddish brown (5YR 3/3) moist; moderate medium blocky structure; very hard, very firm; common fine roots; few fine pores; thin continuous clay films; neutral; gradual smooth boundary.

Bt2—19 to 31 inches; reddish brown (5YR 5/4) clay loam, reddish brown (5YR 4/4) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—31 to 46 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 4/6) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Btk—46 to 80 inches; pink (5YR 8/4) clay; pink (5YR 8/4) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 55% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 3
Location: Lamb County, Texas; in a cultivated field 1700 feet north of unpaved county road, 5.6 mi west of US highway 385, 2.0 mi north of US highway 70 in Springlake. Latitude 34^o 14’N, 102^o 22’W. Unger et al. 1993.

Ap—0 to 8 inches; reddish brown (5YR 5/3) fine sandy loam, reddish brown (5YR 4/3) moist; weak medium subangular blocky structure; slightly hard friable; many fine and medium roots; common fine and medium pores; neutral; abrupt smooth boundary.

Bt1—8 to 13 inches; reddish brown (5YR 5/3) clay loam, reddish brown (5YR 4/3) moist; moderate medium blocky structure; very hard, very firm; common fine roots; few fine pores; thin continuous clay films; neutral; gradual smooth boundary.

Bt2—13 to 27 inches; red (2.5YR 5/6) clay loam, red (2.5YR 4/6) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—27 to 41 inches; yellowish brown (2.5YR 5/4) sandy clay loam, yellowish brown (2.5YR 4/4) moist; weak medium blocky structure; very hard, very firm; few fine roots; few fine pores, thin patchy clay films; few threads, films, and small concretions of calcium carbonate; mildly alkaline; clear smooth boundary.

Bt4—41 to 53 inches; light red (2.5YR 6/6) sandy clay loam, red (2.5YR 5/6) moist; weak medium blocky structure; hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; moderately alkaline; clear wavy boundary.

Btk—53 to 90 inches; pink (5YR 8/4) clay; pink (5YR 8/4) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 41% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 4
Location: Bailey County, Texas; in a cultivated field 700 feet east of unpaved county road, 0.9 mi north and 18.0 mi west of US highway 214, 13.2 mi south of its intersection with US highway 84 in Muleshoe. Latitude 34^o 12’N, Longitude 102^o 54’W. Unger et al. 1993.

Ap—0 to 7 inches; reddish gray (5YR 4/2) fine sandy loam, dark reddish gray (5YR 4/2) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common fine and medium pores; neutral; abrupt smooth boundary.

Bt1—7 to 20 inches; dark reddish gray (5YR 4/2) fine sandy loam, dark reddish brown (5YR 3/2) moist; weak coarse prismatic structure, parting to weak medium blocky structure; hard, friable; common fine roots; few fine pores; thin patchy clay films; neutral; gradual smooth boundary.

Bt2—20 to 32 inches; reddish brown (5YR 5/4) sandy clay loam, reddish brown (5YR 4/4) moist; moderate medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads and films of calcium carbonate; calcareous; moderately alkaline; gradual smooth boundary.

Bt3—32 to 46 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 4/6) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; moderately alkaline; clear smooth boundary.

Btk—46 to 70 inches; pink (5YR 8/4) clay; pink (5YR 8/4) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 46% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 6
Location: Hale County, Texas; in a cultivated field 300 feet south of unpaved county road, 0.2 mi west of Farm Road 179, 1.0 mi north of Farm Road 597, 14.8 mi west of I-27 in Abernathy. Latitude 33^o 54’N, Longitude 102^o W. Unger et al. 1993.

Ap—0 to 7 inches; reddish brown (5YR 5/3) fine sandy loam, reddish brown (5YR 4/3) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common fine and medium pores; neutral; abrupt smooth boundary.

Bt1—7 to 23 inches; reddish gray (5YR 4/2) clay loam, dark reddish brown (5YR 3/2) moist; moderate medium blocky structure; very hard, very firm; common fine roots; few fine pores; thin continuous clay films; neutral; gradual smooth boundary.

Bt2—23 to 39 inches; reddish brown (5YR 4/4) clay loam, dark reddish brown (5YR 3/4) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; slightly alkaline; gradual smooth boundary.

Bt3—39 to 51 inches; red (2.5YR 4/6) sandy clay loam, dark red (2.5YR 3/6) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Btk—51 to 82 inches; reddish yellow (5YR 7/6) clay loam, reddish yellow (5YR 6/6) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 35% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 7
Location: Lubbock County, Texas; in a cultivated field 600 feet south of Farm Road 597, 15.2 mi west of I-27 in Abernathy. Latitude 33^o 50’N, 101^o 58’W. Unger et al. 1993.

Ap—0 to 8 inches; reddish brown (5YR 4/3) fine sandy loam, dark reddish brown (5YR 3/3) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common rine and medium pores; neutral; abrupt smooth boundary.

Bt1—8 to 19 inches; dark reddish gray (5YR 4/2) sandy clay loam, dark reddish brown (5YR 3/2) moist; weak coarse prismatic structure, parting to weak medium blocky structure; very hard, firm; common fine roots; few fine pores; thin patchy clay films; neutral; gradual smooth boundary.

Bt2—19 to 30 inches; reddish brown (5YR 4/4) clay loam, dark reddish brown (5YR 3/4) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—30 to 39 inches; red (5YR 5/6) clay loam, red (5YR 4/6) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads, films, and small concretions of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Btk—39 to 70 inches; pink (5YR 8/4) clay; pink (5YR 8/4) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 38% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 8
Location: Lubbock County, Texas; in a cultivated field 250 feet south of unpaved county road, 1.2 mi east of US highway 84, 1.4 mi southeast of its intersection with Farm Road 2150 in Slaton. Latitude 33^o 24’N, Longitude 101^o 39’W. Unger et al. 1993.

Ap—0 to 7 inches; reddish brown (5YR 4/4) sandy clay loam, dark reddish brown (5YR 3/4) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common fine and medium pores; neutral; abrupt smooth boundary.

Bt1—7 to 18 inches; reddish brown (5YR 4/4) sandy clay loam, dark reddish brown (5YR 3/4) moist; weak coarse prismatic structure, parting to weak medium blocky structure; very hard, firm; common fine roots; few fine pores; thin patchy clay films; mildly alkaline; gradual smooth boundary.

Bt2—18 to 26 inches; yellowish red (5YR 5/8) sandy clay loam, yellowish red (5YR 4/8) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—26 to 39 inches; red (5YR 5/8) sandy clay loam, red (5YR 4/6) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Btk—39 to 70 inches; pink (5YR 8/4) clay loam, pink (5YR 8/4) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 55% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 9
Location: Dawson County, Texas; in a cultivated field 150 feet north of unpaved county road, 2.1 mi west of US highway 87, 6.1 mi north of Ackerly. Latitude 32^o 36’N, Longitude 101^o 44’W. Unger et al. 1993.

Ap—0 to 7 inches; reddish brown (5YR 4/3) fine sandy loam, dark reddish brown (5YR 3/3) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common fine and medium pores; mildly alkaline; abrupt smooth boundary.

Bt1—7 to 14 inches; reddish brown (5YR 4/3) fine sandy loam, dark reddish brown (5YR 3/3) moist; weak coarse prismatic structure, parting to weak medium blocky structure; hard, friable; common fine roots; few fine pores; thin patchy clay films; mildly alkaline; gradual smooth boundary.

Bt2—14 to 23 inches; reddish brown (5YR 4/3) sandy clay loam, dark reddish brown (5YR 3/3) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—23 to 29 inches; reddish brown (5YR 4/4) clay loam, dark reddish brown (5YR 3/4) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads, films, and small concretions of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt4—29 to 35 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 4/6) moist; weak medium blocky structure; few fine roots; few fine pores; thin patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Btk—35 to 60 inches; pink (5YR 8/4) clay, pink (5YR 8/4) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 38% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 10
Location: Howard County, Texas; in a cultivated field 350 feet west of unpaved county road, 1.0 mi south of US highway 87, 2.9 mi southeast of Ackerly. Latitude 32^o 20’N, Longitude 101^o 42’W. Unger et al. 1993.

Ap—0 to 7 inches; brown (7.5YR 4/2) fine sandy loam, dark brown (7.5YR 3/2) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common fine and medium pores; mildly alkaline; abrupt smooth boundary.

Bt1—7 to 13 inches; brown (7.5YR 4/2) sandy clay loam, dark brown (7.5YR 3/2) moist; weak coarse prismatic structure, parting to weak medium blocky structure; very hard, firm; common fine roots; few fine pores; thin patchy clay films; mildly alkaline; gradual smooth boundary.

Bt2—13 to 18 inches; brown (7.5YR 4/2) sandy clay loam, dark brown (7.5YR 3/2) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; mildly alkaline; gradual smooth boundary.

Bt3—18 to 24 inches; reddish brown (5YR 5/3) sandy clay loam, reddish brown (5YR 4/3) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Bt4—24 to 35 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 4/6) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; few patchy clay films, and small concretions of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Btk—35 to 72 inches; pink (5YR 8/4) clay, pink (5YR 8/4) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 44% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 11
Location: Hockley County, Texas; in a cultivated field 500 feet west of unpaved county road, 0.2 mi south and 3.0 mi east of State Highway 168, 5.2 mi south of Anton. Latitude 33^o 46’N, Longitude 102^o 9’W. Unger et al. 1993.

Ap—0 to 7 inches; reddish brown (5YR 4/3) fine sandy loam, dark reddish brown (5YR 3/3) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common fine and medium pores; neutral; abrupt smooth boundary.

Bt1—7 to 22 inches; reddish brown (5YR 4/4) fine sandy loam, dark reddish brown (5YR 3/4) moist; weak coarse prismatic structure, parting to weak medium blocky structure; hard, firm; common fine roots; few fine pores; thin patchy clay films; mildly alkaline; gradual smooth boundary.

Bt2—22 to 34 inches; reddish brown (5YR 5/4) sandy clay loam, reddish brown (5YR 4/4) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—34 to 54 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 4/6) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Bt4—54 to 70 inches; pink (5YR 8/4) clay, pink (5YR 8/4) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 47% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Acuff 12
Location: Lynn County, Texas; in a cultivated field 1400 feet east of Farm Road 1730, 0.25 mi north of New Home. Latitude 33^o 20’N, Longitude 101^o 54’W. Unger et al. 1993.

Ap—0 to 8 inches; dark reddish gray (5YR 4/2) fine sandy loam, dark reddish brown (5YR 3/2) moist; weak medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common fine and medium pores; neutral; abrupt smooth boundary.

Bt1—8 to 19 inches; dark reddish gray (5YR 5/4) sandy clay loam, dark reddish brown (5YR 3/2) moist; weak coarse prismatic structure, parting to weak medium blocky structure; very hard, firm; common fine roots; few fine pores; thin patchy clay films; mildly alkaline; gradual smooth boundary.

Bt2—19 to 27 inches; reddish brown (5YR 5/4) sandy clay loam, reddish brown (5YR 4/4) moist; weak medium blocky structure; very hard, firm; common fine roots; few fine pores; thin patchy clay films; mildly alkaline; gradual smooth boundary.

Bt3—27 to 48 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 4/6) moist; weak medium blocky structure; very hard, firm; few fine roots; few fine pores; thin patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; moderately alkaline.

Btk— 48 to 70 inches; pink (5YR 8/3) clay, pink (5YR 8/3) moist; moderate medium blocky structure; very hard, friable; common fine pores; about 33% of the soil consists of masses and concretions of calcium carbonate; calcareous; moderately alkaline.

A1—0 to 4 inches; dark reddish brown* (5YR 3/3)fine sandy loam; compound weak prismatic and moderate subangular blocky; hard, friable; many small roots; clear smooth boundary.

B21t—4 to 13 inches; dark reddish brown (5YR 3/4) sandy clay loam; compound moderate prismatic and weak subangular blocky; very hard, friable; many small roots; thin discontinuous clay films; clear smooth boundary.

B22t—13 to 23 inches; yellowish red (5YR 4/6) sandy clay loam; compound moderate prismatic and weak subangular blocky; very hard, friable; common small roots; thin discontinuous clay films; common insect casts; gradual smooth boundary.

B23t—23 to 43 inches; yellowish red (5YR 4/8) sandy clay loam; compound moderate prismatic and moderate subangular blocky; very hard, friable; common small roots; thin continuous clay films; common insect casts; clear smooth boundary.

B24tca—43 to 53 inches; yellowish red (5YR 4/8)sandy clay loam; compound weak prismatic and weak subangular blocky; hard, friable; few small roots; thin patchy clay films; common films and threads of CaCO 3 , few CaCO 3 bodies; abrupt wavy boundary.

B25tca —53+ inches; reddish yellow (5YR 7/4) (5YR 6/6) (5YR 5/6) clay loam; weak subangular blocky; moderately cemented; very few small roots; calcareous.

*Colors for all profile descriptions are for moist soil.

Amarillo—Irrigated
Location: Lubbock County, TX: 2.5 miles northwest on U.S. highway 84 from the junction of highway 84 and Quaker Ave. in Lubbock, thence 0.2 mile west on a paved county road, thence 100 yards south into a cultivated field. Latitude 33^o 38’N, Longitude 101^o 53’W. Bryant, 1977.

Ap1—0 to 4 inches; dark brown (7.5YR 4/4) fine sandy loam; weak subangular blocky; slightly hard, very friable; clear wavy boundary.

Ap2—4 to 7 inches; dark reddish brown (5YR 3/4) fine sandy loam;, massive; very hard, friable; abrupt smooth boundary.

B21t—7 to 12 inches; dark reddish brown (5YR 3/3) sandy clay loam; weak prismatic and moderate subangular blocky; very hard, friable; gradual smooth boundary.

B22t—12 to 24 inches; dark reddish brown (5YR 3/4) sandy clay loam; compound moderate prismatic and moderate subangular blocky; very hard, friable; clear wavy boundary.

B23t—24 to 35 inches; yellowish red (5YR 4/6) sandy clay loam; compound moderate prismatic and moderate subangular blocky; very hard, friable; clear wavy boundary.

B24t—35 to 52 inches; yellowish red (5YR 4/6) sandy clay loam; compound weak prismatic and moderate subangular blocky; very hard, friable; common films and threads of CaCO 3 ; gradual smooth boundary.

B25t—52 to 56 inches; yellowish red (5 YR 5/6) sandy clay loam; compound weak prismatic and weak subangular blocky; very hard, friable; common films and threads of CaCO 3 ; clear wavy boundary.

B26tca—56 + inches; pink (5YR 7/4) clay loam; structureless; massive; weakly cemented; calcareous.

Amarillo-Dryland
Location: Lubbock County, TX: 0.4 mile south on Quaker Ave. from the junction of 4 th Street and Quaker Ave. in Lubbock, thence 50 yards east into cultivated field. Latitude 33^o 35’N, Longitude 101^o 52’W. Bryant, 1977.

Ap1—0 to 6 inches; dark reddish brown (5YR 3/4) fine sandy loam; weak subangular blocky and granular; hard, friable; clear wavy boundary.

Ap2—6 to 12 inches; dark reddish brown (5YR 3/4) sandy clay loam; structureless, massive; very hard, friable; clear wavy boundary.

B21t—12 to 24 inches; reddish brown (5 YR 4/4) sandy clay loam; compound moderate prismatic and moderate subangular blocky; very hard, friable; thin continuous clay film; clear smooth boundary.

B22t—24 to 32 inches; yellowish red (5YR 4/6) sandy clay loam; compound moderate prismatic and moderate subangular blocky; very hard, friable; thin discontinuous clay films; ped surfaces coated with carbonates; common insect casts; clear smooth boundary.

B23t—32 to 50 inches; yellowish red (5YR 4/8) sandy clay loam; compound weak prismatic and weak subangular blocky; very hard, friable; thin discontinuous clay films; common files and threads of CaCO 3 ; clear wavy boundary.

B24tca—50+ inches; reddish yellow (5YR 6/6) clay loam; weak subangular blocky; very hard, friable; calcareous.

Amarillo
Location: Lubbock County, TX; 0.1 mile south on Quaker Ave. from the junction of 4 th Street and Quaker Ave. in Lubbock, thence 50 yards east. Latitude 33^o 36’N, Longitude 101^o 52’W. Paetzold, 1972.

Ap—0 to12 inches; brown (7.5 YR 4/4) fine sandy loam, dark brown 7.5 YR 3/2) moist; weak subangular blocky structure; friable when moist; noncalcareous; many roots; clear, smooth boundary.

B21t—12 to 30 inches; reddish brown (5 YR 4/4) sandy clay loam, dark reddish brown (5YR 3/4) moist; compound, weak prismatic and weak subangular blocky structure; friable when moist; noncalcareous; many roots, clear, smooth boundary.

B22t—30 to 39 inches; reddish brown (5YR 4/4) sandy clay loam, dark reddish brown (5 YR 3/4) moist; compound moderate prismatic and moderate subangular blocky structure; firm when moist, noncalcareous; common roots; clear, smooth boundary.

B3tca—3 to 54 inches; reddish brown (5YR 4/4) sandy clay loam, dark reddish brown (5 YR 3/4) moist; compound moderate prismatic and moderate subangular blocky structure; firm when moist; films and threads of CaCO 3 ; common roots; abrupt, irregular boundary.

Pullman Profile Descriptions
In this section, the profiles at the seven sites are described in detail by horizons after Unger and Pringle (1981) and used with permission. These descriptions are based on examination and determinations made in the field immediately after extracting the cores. Although data in subsequent sections are based mainly on horizons above the calcic horizon, the calcic horizon is included in the profile descriptions. The descriptions are:

Pullman 1
Location: Carson County, Texas; in a cultivated field 1000 feet west and 1300 feet north of the intersection of State Highway 207 and Farm Road 293. Latitude 35^o 20’N, Longitude 101^o 24’W. Unger and Pringle, 1981.

Ap—0 to 6 inches; brown (7.5YR 4/2) silty clay loam, dark brown (7.5YR 3/2) moist; weak fine and medium granular structure; hard, friable; few fine roots; few fine pores; neutral; abrupt smooth boundary.

B21t—6 to 14 inches; dark brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; extremely hard, very firm; few fine roots on ped faces; few fine pores; thin continuous clay films; few vertical cracks; neutral; gradual smooth boundary.

B22t—14 to 26 inches; dark brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; few slickensides 2 to 4 inches across; extremely hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B23t—26 to 39 inches; reddish brown (5YR 5/3) silty clay, reddish brown (5YR 4/3) moist; moderate medium blocky; few slickensides 2 to 4 inches across; extremely hard, very firm; few pores; thin clay films on ped faces; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B24t—39 to 59 inches; yellowish red (5YR 5/6) silty clay, yellowish red (5YR 4/6) moist; moderate medium subangular blocky structure; few small pressure faces; very hard, firm; few fine pores; few patchy clay films; common threads and films of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

B25tca—59 to 80 inches; pink (7.5YR 8/4) clay loam, pink (7.5YR 7/4) moist; moderate medium subangular blocky structure; very hard, friable; few fine pores; about 45% of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Pullman 2
Location: Armstrong County, Texas; in a cultivated field 200 feet south of Farm Road 205, 5.5 miles west of its intersection with State Highway 287. Latitude 35^o 7’N, Longitude 101^o 24’W. Unger and Pringle, 1981.

Ap—0 to 6 inches; brown (7.5 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak fine and medium granular structure; hard, friable; few fine roots; few fine pores; mildly alkaline; abrupt smooth boundary.

B21t—6 to 13 inches; dark brown (7.5YR 4/2) clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; extremely hard, very firm; few fine roots on ped faces; few fine pores; think continuous clay films; common vertical cracks; mildly alkaline; gradual smooth boundary.

B22t—13 to 21 inches; dark brown (7.5YR 4/2) clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; few slickensides 2 to 4 inches across; extremely hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B23t—21 to 35 inches; reddish brown (5YR 5/4) clay, reddish brown (5YR 4/4) moist; moderate medium blocky structure; few slickensides 2 to 4 inches across; extremely hard, very firm; few pores; thin clay films on ped faces; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B24t—35 to 50 inches; yellowish red (5YR 5/6) clay, yellowish red(5YR 4/6) moist; moderate medium subangular blocky structure; few small pressure faces; very hard, firm; few fine pores; few patchy clay films; common threads and films of calcium carbonate; calcareous; mildly alkaline, clear smooth boundary.

B25tca—50 to 70 inches; reddish yellow (5YR 7/6) clay loam, reddish yellow (5YR 6/6) moist; moderate medium subangular blocky structure; very hard, friable; few fine pores; about 35% of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Pullman 3
Location: Potter County, Texas; in a cultivated field 520 feet east of paved county road, 2.0 miles west and 0.6 mile south of the intersection of Interstate Highway 40 and Farm Road 2381. Latitude 35^o 10’N, Longitude 102^o 4’W. Unger and Pringle, 1981.

Ap—0-6 inches; brown (7.5YR 4/2) silty clay loam, dark brown (7.5YR 3/2) moist; weak fine and medium granular structure; hard, friable; few fine roots; few fine pores; neutral; abrupt smooth boundary.

B21t—6 to 16 inches; dark brown (7.5YR 4/2) clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; extremely hard, very firm; few fine roots on ped faces; few fine pores; thin continuous clay films; few vertical cracks; neutral; gradual smooth boundary.

B22t—16 to 29 inches; dark brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shape peds; few slickensides 2 to 4 inches across; extremely hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; neutral; gradual smooth boundary.

B23t—29 to 44 inches; reddish brown (5YR 5/4) silty clay, reddish brown (5YR 4/4) moist; moderate medium blocky structure; few slickensides 2 to 4 inches across; extremely hard, very firm; few pores; thin clay films on ped faces; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B24t—44 to 58 inches; yellowish red (5YR 5/6) clay, yellowish red (5YR 4/6) moist; moderate medium subangular blocky structure, few small pressure faces; very hard, firm; few fine pores; few patchy clay films of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

B25tca—58 to 80 inches; pink (7.5YR 8/4) clay loam, pink (7.5YR 7/4) moist; moderate medium subangular blocky structure; very hard, friable; few fine pores; about 50% of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline; gradual smooth boundary.

B26tca—80 to 92 inches; reddish yellow (5YR 7/6) clay loam, reddish yellow (5YR 6/6) moist; moderate medium subangular blocky structure; very hard, firm; few fine pores; few patchy clay films; about 20% of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Pullman 4
Location: Swisher County, Texas; in a cultivated field 150 feet south of county road, 1.1 miles west of Farm Road 2301, at a point 2.0 miles south of its intersection with Farm Road 145. Latitude 32^o 22’N, Longitude 101^o 37’W. Unger and Pringle, 1981.

Ap—0 to 6 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak fine and medium granular structure; hard, friable; few fine roots; few fine pores; neutral; abrupt smooth boundary.

B21t—6 to 17 inches; dark brown (7.5YR 4/2) clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; extremely hard, very firm; few fine roots on ped faces; few fine pores; thin continuous clay films; few vertical cracks; mildly alkaline; gradual smooth boundary.

B22t—17 to 30 inches; dark brown (7.5YR 4/2) clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; few slickensides 2 to 4 inches across; extremely hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B23t—30 to 42 inches; reddish brown (7.5YR 5/4) clay loam, brown (7.5YR 4/4) moist; moderate medium blocky structure; few slickensides 2 to 4 inches across; extremely hard, very firm; few pores; thin clay films on ped faces; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B24t—42 to 48 inches; light brown (7.5YR 6/4) clay, brown (7.5YR 5/4) moist; moderate medium subangular blocky structure; few small pressure faces; very hard, firm; few fine pores; few patchy clay films; common threads and films of calcium carbonate; calcareous; moderately alkaline; clear smooth boundary.

B25tca—48 to 60 inches; pink (7.5YR 8/4) clay loam, pink (7.5YR 7/4) moist; moderate medium subangular blocky structure; very hard, friable; few fine pores; about 60% of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Pullman 5
Location: Castro County, Texas; in a cultivated field, 900 feet west of Farm road 168, at a point 1.5 miles south of its intersection with State Highway 86. Latitude 34^o 32’N, Longitude 102^o 6’W. Unger and Pringle, 1981.

Ap—0 to 6 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak fine and medium granular structure; hard, friable; few fine roots; few fine pores; neutral; abrupt smooth boundary.

B21t—6 to 13 inches; dark brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; extremely hard, very firm; few fine roots on ped faces; few fine pores; thin continuous clay films; few vertical cracks; neutral; gradual smooth boundary.

B22t—13 to 20 inches; dark brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; few slickensides 2 to 4 inches across; extremely hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B23t—20 to 32 inches; reddish brown (5 YR 5/3) clay, reddish brown (5YR 4/3) moist; moderate medium blocky structure; few slickensides 2 to 4 inches across; extremely hard, very firm; few pores; thin clay films on ped faces; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B24t—32 to 40 inches; reddish brown (5YR 5/4) clay, reddish brown (5YR 4/4) moist; moderate medium subangular blocky structure, few small pressure faces; very hard, firm; few fine pores; few patchy clay films; common threads and films of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

B25tca—40 to 65 inches; reddish yellow (5YR 7/6) clay loam, reddish yellow (5YR 6/6) moist; moderate medium subangular blocky structure; very hard, firm; few fine pores; about 30% of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Pullman 6
Location: Deaf Smith County, Texas; in a cultivated field 2500 feet east of Farm Road 1057, 0.5 mile north of its intersection with Farm Road 1058. Latitude 34^o 49’N, Longitude 102^o 31’W. Unger and Pringle, 1981.

Ap—0 to 6 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak fine and medium granular structure; hard, friable; few fine roots; few fine pores; neutral; abrupt smooth boundary.

B21t—6 to 19 inches; dark brown (7.5YR 4/2) clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; extremely hard, very firm; few fine roots on ped faces; few fine pores; thin continuous clay films; few vertical cracks; neutral; gradual smooth boundary.

B22t—19 to 28 inches; dark brown (7.5YR 4/4) clay, dark brown (7.5YR 3/4) moist; moderate medium blocky structure; few wedge shaped peds; few slickensides 2 to 4 inches across; extremely hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B23t—28 to 38 inches; reddish brown (5YR 5/4) clay, reddish brown (5YR 4/4) moist; moderate medium blocky structure; few slickensides 2 to 4 inches across; extremely hard, very firm; few pores; thin clay films on ped faces; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B24t—38 to 52 inches; reddish yellow (5YR 7/6) clay, reddish yellow (5YR 6/6) moist; moderate medium subangular blocky structure; very hard, firm; few fine pores; few patchy clay films; common threads and films of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

B25tca—52 to 70 inches; pink (7.5YR 8/4) clay loam, pink (7.5YR 7/4) moist; moderate medium subangular blocky structure; very hard, friable; few fine pores; about 50 percent of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Pullman 7
Location: Floyd County, Texas; in a cultivated field, 100 feet west of a county road, 0.5 miles north of U.S. Highway 70, 2.0 miles east of its intersection with State Highway 207. Latitude 34^o 59’N, Longitude 101^o 17’W. Unger and Pringle, 1981.

Ap—0 to 7 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak fine and medium granular structure; hard, friable; few fine roots; few fine pores; neutral; abrupt smooth boundary.

B21t—7 to 18 inches; dark brown (7.5YR 4/2) clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge shaped peds; extremely hard, very firm; few fine roots on ped faces; few fine pores; thin continuous clay films; few vertical cracks; neutral; gradual smooth boundary.

B22t—18 to 30 inches; reddish brown (5YR 4/3) clay, dark reddish brown (5YR 3/3) moist; moderate medium blocky structure; few wedge shaped peds; few slickensides 2 to 4 inches across; extremely hard, very firm; few fine roots; few fine pores; thin continuous clay films of calcium carbonate; calcareous; mild alkaline; gradual smooth boundary.

B23t—30 to 48 inches; reddish brown (5YR 5/4) clay, reddish brown (5YR 4/4) moist; moderate medium blocky structure; few slickensides 2 to 4 inches across; extremely hard, very firm; few pores; thin clay films on ped faces; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

B24tca—48 to 60 inches; pink (7.5YR 8/4) clay loam, pink (7.5YR 7/4) moist; moderate medium subangular blocky structure; very hard, friable; few fine pores; about 50% of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Randall 1
Location: Lubbock County, Texas; located 5.8 km north of the intersection of FM 789 and FM 1527, then 0.40 km east of FM 789. Latitude 33^o 48’N, Longitude 101^o 38’W. Evans, 1990.

A1—0 to 39 inches; very dark grayish brown (10YR 3/2) moist; clay; moderate fine blocky structure; firm; few roots; noncalcareous; clear smooth boundary.

A2—39 to 56 inches; very dark gray (10YR 3/1) moist; clay; moderate fine blocky structure; firm; few roots; noncalcareous; clear irregular boundary.

A/Bw—56 to 85 inches; A part: Very dark gray (10YR 3/1) moist; clay; weak subangular blocky structure; firm; very few roots; noncalcareous. B part: Dark gray (5Y 4/1) moist; clay; weak blocky structure; very firm; very few roots; calcareous; clear wavy.

Bw1—85 to 102 inches; dark gray (5Y 4/1) moist; clay; moderate blocky structure; very firm; common slickensides; calcareous; gradual smooth boundary.

Bw2—102 to 137 inches; dark gray (5Y 4/1) moist; clay; moderate blocky structure; very firm; common intersecting slickensides; calcareous.

Remarks: At 36-38 cm, 2.5 cm wide clay strata dark brown (10YR 3/3) moist.

Randall 2
Location: Lubbock County, Texas; located 1.6 km north of the intersection of FM 1729 and I-27, then 2.0 km east on an unpaved county road. The sampling site was on the south side of the county road. Latitude 33^o 44’N, Longitude 101^o 46’W. Evans, 1990.

Al—0 to 21 inches; very dark brown (10YR 2/2) moist; clay; moderate subangular blocky structure; friable; many fine roots; noncalcareous; gradual wavy boundary.

A2—21 to 43 inches; very dark brown (10YR 2/2) moist; clay; weak fine blocky structure; friable; common roots; noncalcareous; clear wavy boundary.

Bw1—43 to 70 inches; dark gray (10YR 4/1) moist; clay; weak fine blocky structure; firm; common roots; calcareous; gradual smooth boundary.

Bw2—70 to 114 inches; dark gray (10YR 4/1) moist; clay moderate blocky structure; very firm; few roots; few intersecting slickensides; calcareous; gradual wavy boundary.

Bw3—114 to 135 inches; dark gray (10YR 4/1) moist; clay; moderate blocky structure; very firm; few roots; common intersecting slickensides; calcareous.

Randall 3
Location: Lubbock County, Texas; located 2.4 km west of the intersection of FM 2641 and FM 179, then 0.40 km north on an unpaved road. Latitude 33^o 39’N, Longitude 102^o 1’W. Evans, 1990.

Ap1—0 to 12 inches; very dark brown (10YR 2/2) moist; clay; mixed moderate granular parting to weak subangular blocky structure; friable; many roots; calcareous; clear smooth boundary.

Ap2—12 to 34 inches; very dark brown (10YR 2/2) moist; clay; moderate subangular blocky structure; firm; common roots; calcareous; clear wavy boundary.

Ap3—34 to 62 inches; very dark grayish brown (10YR 3/2) moist; clay; moderate subangular blocky structure; firm; common roots; calcareous; clear wavy boundary.

A—62 to 82 inches; very dark grayish brown (10YR 3/2) moist; clay; moderate subangular blocky structure; very firm; few roots; calcareous; gradual wavy boundary.

Bw1—82 to 104 inches; dark gray (10YR 4/1) moist; clay; weak subangular blocky structure; very firm; few roots; few intersecting slickensides; calcareous; clear wavy boundary.

Bw2—104 to 135 inches; dark gray (10YR 4/1) moist; clay; moderate blocky structure; very firm; few roots; common intersecting slickensides; calcareous.

Remarks: Ap2 and Ap3 contain 10% and 20%, respectively, discontinuous strata dark brown (7.5YR 3/2) moist clay.

Randall 4
Location: Hockley County, Texas; 3.3 miles north on Texas state highway 168 from the intersection with State Highway 114 (116), thence west on ranch road for 1 mile, thence north 0.9 mile, thence west for 1.7 miles and thence north for 0.4 miles into a playa. Latitude 33^o 39’N, Longitude 102^o 11’W. Paetzold, 1972.

A11—0 to 4 inches; grayish brown (10YR 5.5/2) fine sandy loam, very dark grayish brown (10YR 3.5/2) when moist; weak, mixed platy and subangular blocky structure; hard when dry, friable when most; noncalcareous; many roots; few black concretions; wavy abrupt boundary.

A12—4 to 9 inches; dark gray (10 YR 4/1) sandy clay, very dark gray (10 YR 3/1) when moist; moderate, medium blocky structure; extremely hard when dry, very firm when moist; non-calcareous; many roots; few black concretions; smooth, gradual boundary.

AC1—9 to 26 inches; grayish brown (10YR 5/2) clay, dark grayish brown (10 YR 4/2) when most; moderate, coarse blocky structure; extremely hard when dry, extremely firm when most; calcareous; few segregations and concentrations of CaC0 3 ; few roots; few black concretions; diffuse boundary.

AC2—26 to 65 inches; very dark grayish brown (10 YR 3.5/2.5) clay, very dark grayish brown (10YR 3/2) when moist; weak, coarse blocky structure; extremely hard when dry, extremely firm when moist; calcareous; common small concretions of CaCO 3 ; few roots; few black concretions; diffuse boundary.

AC3—65 to 105 inches; dark grayish brown (10 YR 4.5/2) clay, dark grayish brown (10 YR 4/2) when moist; weak, coarse blocky structure to massive; extremely hard when dry, extremely firm when most; calcareous; common, small to large concretions of CaCO 3 ; few roots; few black concretions; diffuse boundary.

Sherm Profile Descriptions
This section describes the profiles at the 11 sites and their locations. The profile descriptions are based on examination and determinations made in the field immediately after extracting the cores and is taken from Unger and Pringle (1986) and used with their permission. Although data in subsequent sections are based mainly on horizons above the calcic horizon, the calcic horizon is included in the profile descriptions. The description areas follow:

Sherm 1
Location: Hartley County, Texas; in a cultivated field 1300 ft east of unpaved county road, 1.7 mi northwest and 0.25 mi west of the intersection of U.S. Highway 385 and Farm Road 998. Latitude 35^o 54’N, Longitude 102 o 24’W. Unger and Pringle, 1986.

Ap—0 to 6 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak, medium granular and subangular blocky structure; slightly hard, friable; many fine and medium roots; few fine pores; mildly alkaline; abrupt smooth boundary.

Bt1—6 to 18 inches; brown (7.5 YR 4/2) clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few small stress surfaces in lower part; extremely hard, extremely firm; common fine roots; few fine pores; thin continuous clay films; few vertical cracks; mildly alkaline; gradual smooth boundary.

Bt2—18 to 28 inches; brown (7.5YR 5/2) clay loam, brown (7.5YR 4/2) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few very fine pores; thin continuous clay films; few small vertical cracks; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—28 to 36 inches; brown (7.5YR 5/4) clay loam, brown (7.5YR 4/4) moist; weak coarse prismatic structure, parting to moderate medium blocky; very hard, very firm; few fine roots; common fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt4—36 to 60 inches; yellowish red (5YR 5/6) clay loam, yellowish red (5YR 4/6) moist; weak coarse prismatic structure, parting to moderate medium blocky; hard, firm; few very fine roots; common fine pores; few patchy clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; clear wavy boundary.

Btk—60-72 inches; pink (5YR 8/4) clay loam, pink (5YR 7/4) moist; moderate medium subangular blocky structure; hard, friable; common fine pores; about 45% of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Sherm 2
Location: Dallam County, Texas; in a cultivated field 300 ft north of irrigation well, 0.5 mi east and 1.4 mi north of Farm Road 297, and 18.3 mi east of its intersection with U.S. Highway 385. Latitude 36^o 4’N, Longitude 102^o 24’W. Unger and Pringle, 1986.

Ap—0 to 7 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak medium granular and subangular blocky structure; hard, friable; many fine roots; few fine pores; dense plow pan is present in lower 2 inches; mildly alkaline; clear smooth boundary.

Bt1—7 to 17 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; moderate medium blocky structures; extremely hard, extremely firm; common fine roots; few fine pores; thin continuous clay films; few vertical cracks; mildly alkaline; gradual smooth boundary.

Bt2—17 to 26 inches; brown (7.5YR 5/4) clay loam, brown (7.5YR 4/4) moist; moderate medium blocky structure; very hard, very firm; common fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—26 to 38 inches; brown (7.5YR 5/4) clay loam, brown (7.5YR 4/4) moist; moderate medium blocky structure; slightly hard, friable; few fine roots; common fine pores; thin continuous clay film; common threads and films of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Ab—38 to 48 inches; brown (7.5YR 5/2) clay loam, brown (7.5YR 4/2) moist; moderate medium subangular blocky structure; slightly hard, friable; few fine roots; common fine pores; calcareous; mildly alkaline; gradual smooth boundary.

Btbl—48 to 60 inches; reddish brown (5YR 5/4) clay loam, reddish brown (5YR 4/4) moist; weak coarse prismatic structure, parting to moderate medium blocky; hard, firm; few fine roots in upper part; common pores; thin continuous clay films; calcareous; mildly alkaline; gradual smooth boundary.

Btb2—60 to 74 inches; yellowish red (5YR 5/6) clay loam, yellowish red (5YR 4/6) moist; weak coarse prismatic structure, parting to moderate medium blocky; hard, firm; common fine pores; thin continuous clay films; calcareous; moderately alkaline.

Sherm 3
Location: Moore County, Texas; in a cultivated field 800 ft east of unpaved county road, 0.9 mi north of Farm Road 281, 1.3 mi east of its intersection with U.S. Highway 287. Latitude 36^o 3’N, Longitude 101 o 58’W. Unger and Pringle, 1986.

Ap—0 to 6 inches; brown (7.5YR 4/2) silty clay loam, dark brown (7.5YR 3/2) moist; weak fine granular and medium subangular blocky structure; slightly hard, friable; many fine and medium roots; common pores; moderately alkaline; clear smooth boundary.

Bt1—6 to 19 inches; dark brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge-shaped peds; few small stress surfaces; extremely hard, extremely firm; many fine roots; few very fine pores; thin continuous clay films; few vertical cracks; mildly alkaline; gradual smooth boundary.

Bt2—19 to 34 inches; brown (7.5YR 5/4) silty clay loam, brown (7.5YR 4/4) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; common patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; moderately alkaline.

Sherm 4
Location: Texas County, Oklahoma; in a cultivated field, 300 ft east of State Highway 136 and 2.05 mi south of its intersection with U.S. Highway 54. Latitude 33^o 36’N, Longitude 101^o 25’W. Unger and Pringle, 1986.

Ap—0 to 6 inches; dark grayish; brown (10YR 4/2) clay, very dark grayish brown (10YR 3/2) moist; weak fine granular and subangular blocky structure; hard, friable, many roots and incorporated residue; moderately alkaline; clear smooth boundary.

Bt1—6 to 20 inches; dark grayish brown (10YR 4/2) clay loam, very dark grayish brown (10YR 3/2) moist; moderate medium blocky structure; extremely hard, extremely firm; few small stress surfaces; common fine roots; few fine pores; thin continuous clay films; few vertical cracks; moderately alkaline; gradual smooth boundary.

Bt2—20 to 38 inches; brown (10YR 5/3) clay loam, brown (10YR 4/3) moist; moderate medium blocky structure; very hard, very firm; common fine roots; few fine pores; common clay films; few small concretions of calcium carbonate that are hard and pitted; calcareous; moderately alkaline; gradual smooth boundary.

Btb1—38 to 63 inches; brown (10YR 5/3) silty clay loam, brown (10YR 4/3) moist; weak coarse prismatic structure, parting to moderate medium blocky; hard, firm; few fine roots; few fine pores; few patchy clay films; few fine black concretions; few threads, films, and small concretions of calcium carbonate; calcareous; moderately alkaline; gradual smooth boundary.

Btb2—63 to 72 inches; grayish brown (10YR 5/2) silty clay loam, dark grayish brown (10YR 4/2) moist; weak coarse prismatic structure, parting to moderate medium blocky; slightly hard, friable, common fine pores; few threads and films of calcium carbonate; calcareous; moderately alkaline.

Sherm 5
Location: Sherman County, Texas; in a cultivated field 300 ft west of Farm Road 2014, 2.0 mi south of U.S. Highway 54, 3.0 mi southwest of its intersection with U.S. Highway 287. Latitude 36^o 18’N, Longitude 102 o 9’W. Unger and Pringle, 1986.

Ap—0 to 6 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak fine granular and subangular blocky structure; hard, friable; many roots; dense plow pan is present in lower 2 inches; mildly alkaline; clear smooth boundary.

Bt1—6 to 17 inches; brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak fine granular and subangular blocky structure; hard, friable; many roots; dense plow pan is present in lower 2 inches; mildly alkaline; clear smooth boundary.

Bt2—17 to 27 inches; brown (7.5YR 5/4) clay loam, brown (7.5YR 4/4) moist; moderate medium blocky structure; very hard, very firm; common fine roots; thin continuous clay films; few threads and films of calcium carbonate; calcareous; moderately alkaline; gradual smooth boundary.

Bt3—27 to 36 inches; brown (7.5YR 5/4) clay loam, brown (7.5YR 4/4) moist; weak coarse prismatic structure, parting to moderate medium blocky; hard, firm; few fine roots; common fine pores; few patch clay films; few threads, films and small concretions of calcium carbonate; calcareous; moderately alkaline; clear smooth boundary.

Bt4—36 to 44 inches; reddish brown (5YR 5/4) clay loam, reddish brown (5YR 4/4) moist; weak coarse prismatic structure, parting to moderate medium blocky; very hard, very firm; few fine roots; few fine pores; common patchy clay films; few threads, films, and small concretions of calcium carbonate; calcareous; moderately alkaline; gradual smooth boundary.

Btk—44 to 72 inches; pink (7.5YR 8/4) clay, pink (7.5YR 7/4) moist; weak coarse platy structure, parting to moderate medium blocky; very hard, firm; common fine pores; about 20% of the soil mass consists of soft masses and weakly cemented concretions of calcium carbonate; calcareous; moderately alkaline.

Sherm 6
Location: Moore County, Texas; in a cultivated field 200 ft east of private road, 1.05 mi north of paved county road, 1.0 mi west of Farm Road 1060 at a point 4.0 mi north of its intersection with State Highway 152. Latitude 35^o 53’N, Longitude 101^o 37’W. Unger and Pringle, 1986.

Ap—0 to 7 inches; dark reddish gray (5YR 4/2) silty clay loam, dark reddish brown (5YR 3/2) moist; weak fine granular and subangular blocky structure; hard, friable; many roots; moderately alkaline; clear smooth boundary.

Bt1—7 to 19 inches; dark reddish brown (5YR 3/2) silty clay, dark reddish brown (5YR 2/2) moist; moderate medium blocky structure; few small stress surfaces; extremely hard, extremely firm; common fine roots; few fine pores; thin continuous clay films; few vertical cracks; calcareous; moderately alkaline; gradual smooth boundary.

Bt2—19 to 35 inches; reddish brown (5YR 4/4) clay, reddish brown (5YR 3/4) moist; moderate medium blocky structure; few small stress surfaces; extremely hard, extremely firm; few fine roots; few fine pores; thin continuous clay films; calcareous; moderately alkaline; gradual smooth boundary.

Bt3— 35 to 58 inches; brown (7.5YR 5/4) silty clay, brown (7.5YR 4/4) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; moderately alkaline; clear wavy boundary.

Btk—58 to 74 inches; pink (7.5 YR 8/4) silty clay loam, pink (7.5YR 7/4) moist; weak coarse platy structure, parting to moderate medium blocky; very had friable; very few fine roots in upper 2 inches; about 50% of the soil mass consists of weakly cemented concretions of calcium carbonate; calcareous; moderately alkaline.

Sherm 7
Location: Hansford County, Texas; in a cultivated field, 2,500 ft west of State Highway 136, 8.7 mi north of Gruver. Latitude 36^o 19’N, Longitude 101^o 27’W. Unger and Pringle, 1986.

Ap—0 to 6 inches; dark brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; weak fine granular and moderate medium subangular blocky structure; hard, friable; common roots; common pores; dense plow pan present in lower part; mildly alkaline; clear smooth boundary.

Bt1—6 to 18 inches; dark brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few wedge-shaped peds; few small stress surfaces; extremely hard, very firm; common fine roots; few fine pores; thin continuous clay films; mildly alkaline; gradual smooth boundary.

Bt2—18 to 26 inches; brown (10YR 5/3) silty clay, brown (10YR 4/3) moist, moderate medium blocky structure; few small stress surfaces; very hard, firm; few fine roots; few fine ores; thin continuous clay films; calcareous; moderately alkaline; gradual smooth boundary.

Bt3—26 to 39 inches; brown (7.5YR 5/4) silty clay loam, brown (7.5YR 4/4) moist; weak coarse prismatic structure, parting to moderate medium subangular blocky structure; hard, firm; few fine roots; few very fine pores; few patchy clay films; common threads and films of calcium carbonate; calcareous; moderately alkaline; gradual smooth boundary.

Bt4—39 to 53 inches; brown (7.5YR 5/4) silty clay, brown (7.5YR 4/4) moist; weak coarse prismatic structure, parting to moderate medium subangular blocky; few fine roots; few very fine pores; few patchy clay films; few threads and films of calcium carbonate; calcareous; moderately alkaline; clear smooth boundary.

Btk—53 to 76 inches; pink (7.5YR 8/4) silty clay loam, pink (7.5YR 7/4) moist; weak coarse platy structure, parting to moderate medium blocky structure; very hard, friable; common fine pores; about 45% of the soil mass consists of soft masses and concretions of calcium carbonate; calcareous; moderately alkaline.

Sherm 8
Location: Hansford County, Texas; in a cultivated field 3200 ft east of a paved county road, 3.6 mi south of State Highway 15, at a point 1.3 mi northeast of its junction with U.S. Highway 207. Latitude 36^o 13’N, Longitude 101^o 20’W. Unger and Pringle, 1986.

Ap—0 to 6 inches; dark brown (7.5YR 4/2) silty clay loam, dark brown (7.5YR 3/2) moist; weak granular and moderate medium subangular blocky structure; hard, friable; many fine roots; common fine pores; mildly alkaline; clear smooth boundary.

Bt1—6 to 20 inches; dark brown (7.5YR 4/2) silty clay loam, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; extremely hard, very firm; common fine roots; few very fine pores; thin continuous clay films; few small stress surfaces; moderately alkaline; gradual smooth boundary.

Bt2—20 to 37 inches; brown (10YR 5/3) silty clay loam, brown (10YR 4/3) moist; moderate medium blocky structure; extremely hard, very firm; few fine roots; few very fine pores; thin continuous clay films; few small stress surfaces; calcareous; moderately alkaline; clear smooth boundary.

Ab—37 to 50 inches; brown (7.5YR 5/4) silty clay loam, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; very hard, firm; few fine roots; few very fine pores; few threads, films, and small concretions of calcium carbonate; calcareous; moderately alkaline; clear smooth boundary.

Btb1—50 to 60 inches; reddish yellow (5YR 6/6) silty clay loam, yellowish red (5YR 5/6) moist; weak coarse prismatic structure, parting to moderate medium blocky structure; hard, friable; few fine roots; few patchy clay films; common very fine pores; common threads and films of calcium carbonate; calcareous; moderately alkaline; gradual smooth boundary.

Btb2—60 to 93 inches; reddish yellow (5YR 6/8) silty clay loam yellowish red (5YR 5/8) moist; weak coarse prismatic structure, parting to moderate medium blocky; hard, friable; few fine roots to 76 inches; few patchy clay films; common very fine pores; common threads, films, and small concretions of calcium carbonate; calcareous; moderately alkaline.

Sherm 9
Location: Beaver County, Oklahoma; in a cultivated field 500 ft north of unpaved county road, 11.8 mi east of U.S. Highway 83 at a point 0.25 mi north of the Texas-Oklahoma state line. Latitude 36^o 42’N, Longitude 100^o 42’W. Unger and Pringle, 1986.

Ap—0 to 7 inches; dark brown (7.5YR 4/2) silty clay loam, dark brown (7.5YR 3/2) moist; weak fine granular and subangular blocky structure; hard, friable; many fine and medium roots; mildly alkaline; clear smooth boundary.

Bt1—7 to 19 inches; brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few small stress surfaces; extremely hard, extremely firm; many fine roots; a few fine pores; thin continuous clay films; few vertical cracks; mildly alkaline; gradual smooth boundary.

Bt2—19 to 36 inches; brown (10YR 5/3) silty clay, brown (10YR 4/3) moist; moderate medium blocky structure; few small stress surfaces; extremely hard; extremely firm; few fine roots; few fine pores; few threads and films of calcium carbonate; calcareous; mildly alkaline; clear smooth boundary.

Ab—36 to 43 inches; brown (10YR 4/3) silty clay loam, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; hard, friable; few fine roots; common fine pores; few threads, films and weakly cemented concretions of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Btb1—43 to 59 inches; brown (7.5YR 5/4) silty clay loam, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; hard, firm; few fine roots; common fine pores; few patchy clay films; calcareous; mildly alkaline; gradual smooth boundary.

Btb2—59 to 72 inches; brown (7.5YR 5/4) silty clay loam, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; hard, firm; common patchy clay films; few fine pores; mildly alkaline.

Sherm 10
Location: Ochiltree County, Texas; in a cultivated field 100 ft south of unpaved county road, 2.2 mi west of U.S. Highway 83 at a point 5.6 mi south of its intersection with State Highway 15. Latitude 36^o 22’N, Longitude 100^o 51’W. Unger and Pringle, 1986.

Ap—0 to 8 inches; dark brown (7.5YR 4/2) silty clay loam, dark brown (7.5YR 3/2) moist; weak fine granular and subangular blocky structure; hard, friable; many fine roots and incorporate residue; mildly alkaline; clear smooth boundary.

Bt1—8 to 24 inches; brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; moderate medium blocky structure; few small stress surfaces; extremely hard, extremely firm; common fine roots; few fine pores; thin continuous clay films; few vertical cracks; mildly alkaline; gradual smooth boundary.

Bt2—24 to 38 inches; brown (7.5YR 5/2) silty clay, brown (7.5YR 4/2) moist; moderate medium blocky structure; few small stress surfaces; extremely hard, extremely firm; few fine roots; few fine roots; few fine pores; thin continuous clay films; few vertical cracks; mildly alkaline; clear smooth boundary.

AB--38 to 51 inches; brown (10YR 5/3) silty clay, brown (10YR 4/3) moist; moderate medium subangular blocky structure; hard, firm, few fine roots; few fine pores; few threads and films of calcium carbonate; calcareous; mildly alkaline; gradual smooth boundary.

Btb1—51 to 63 inches; yellowish brown (10YR 5/4) silty clay loam, dark yellowish brown (10YR 4/4) moist; weak coarse prismatic structure, parting to moderate medium blocky; very hard, firm; few fine roots; few fine pores; common patchy clay films; calcareous; mildly alkaline; gradual smooth boundary.

Btb2—63 to 76 inches; brown (7.5YR 5/4) silty clay loam, brown (7.5YR 4/4) moist; weak coarse prismatic structure, parting to moderate medium blocky; very hard, firm; occasional very fine roots; few fine pores; common patchy clay films; calcareous; mildly alkaline.

Sherm 11
Location: Dallam County, Texas; in a cultivated field, 1000 ft south of Farm Road 695, 21 mi east of U.S. Highway 54, at a point 5.2 mi northeast of its intersection with U.S. Highway 385. Latitude 36^o 5’N, Longitude 102^o 26’W. Unger and Pringle, 1986.

Ap—0 to 7 inches; reddish brown (5YR 4/3) clay loam, dark reddish brown (5YR 3/3) moist; weak fine granular and subangular blocky structure; hard, friable; many roots; mildly alkaline; clear smooth boundary.

Bt1—7 to 20 inches; reddish brown (5YR 4/3) clay loam, dark reddish brown (5YR 3/3) moist; moderate medium blocky structure; few small stress surfaces; extremely hard, extremely firm; common fine roots; few fine pores; thin continuous clay films; few vertical cracks; calcareous; mildly alkaline; gradual smooth boundary.

Bt2—20 to 32 inches; reddish brown (5YR 5/3) clay loam, reddish brown (5YR 4/3) moist; moderate medium blocky structure; few small stress surfaces; extremely hard, extremely firm; few fine roots; few fine pores; thin continuous clay films; calcareous; mildly alkaline; gradual smooth boundary.

Bt3—32 to 47 inches; yellowish red (5YR 5/6) silty clay loam, yellowish red (5YR 4/6) moist; moderate medium blocky structure; very hard, very firm; few fine roots; few fine pores; thin continuous clay films; few threads and films of calcium carbonate; calcareous; mildly alkaline; clear wavy boundary.

Btk—47 to 80 inches; pink (5YR 7/4) silty clay loam, light reddish brown (5YR 6/4) moist; weak coarse platy structure, parting to moderate medium blocky; very hard, friable; very few fine roots in upper 2 inches; about 50% of the soil mass consists of weakly cemented concretions of calcium carbonate; calcareous; moderately alkaline.