8 BULLETIN 1260, U. S. DEPARTMENT OF AGRICULTURE. 
apparently a clay loam. Judged from an exposure about 3 miles 
west of Chillicothe this soil is about as follows, from the surface 
downward: Loose, silty, structureless loam, to 3 inches: 3 to 12 
inches, very dark-brown granular clay loam: 12 to 30 inches, lighter 
colored, somewhat reddish brown clay loam less granular than the 
second layer: 30 inches and below, red clay, cloddy, without granu- 
lation, containing abundant lime carbonate. 
At Amarillo. Tex., the greater part of the station, if not all. is 
covered by what was mapped as Amarillo clay loam. On the experi- 
mental area the soil is a little darker than typical Amarillo soil, 
approaching in its character the Richfield soils. The profile is - 
follows, from the surface downward: Dark brown, nearly black, 
rather heavy loam, to 3 inches: dark reddish brown, rather cloddy 
clay loam with imperfect granulation, 3 to S inches: reddish brown 
clay without granulation, 8 to 30 inches; calcareous red clay without 
granulation. 30 inches. A whitish layer containing up to 30 per cent 
of accumulated carbonate of lime lies beneath the mature soils of 
whole region at a depth ranging from 3 to 8 feet. 
Woodward. Okla., is situated on the same group of soils as Chilli- 
cothe, but the field station is located on a very sandy tract of land 
about 1 mile south of town. A layer of sandy loam varying in thick- 
ness from 1 to 4 feet overlies the reddish clay subsoil. The clay - 
outside of this sandy area possibly belong to the Foard series. 
The soil type at Lawton, Okla., has not yet been definitely iden- 
tified. The station is situated exactly on the boundary between the 
prairies and the Great Plains. The soil on the west end of the I . 
resembles the Kirkland soils of Payne county, Okla.. while those on 
the eastern part correspond roughly to the Vernon soils of Texas. 
The profile on the eastern half of the station is as follows, from the 
surface downward: Dark-brown fine sandy loam without well- 
defined structure, to 6 inches; dark-brown fine sandy loam with a 
tendency to granulation, 6 to 10 inches; a well-defined, dark red- 
brown heavy clay horizon, hard and tough when dry, 10 to 14 inches; 
red-brown clay loam with scattered lime concretions, 14 to 2S inches; 
reel-brown clay loam without noticeable lime accumulation, 28 inches 
and below. 
The soil at Dalhart, Tex., has not been studied, but a sample taken 
near the station indicated the following profile: The surface 2 inches, 
a loose grayish deflocculated sandy loam; next, down to a 12-inch 
depth, rather compact dark reddish brown loam or clay loam with 
columnar breakage on outcrops and no granulation; below this a 
calcareous loam. The soil may belong to the Miles series, but is 
probably less productive than that at Big Spring. 
The soil at Big Spring, Tex., has not been definitely identified, but 
seems to resemble more closely the soils of the Miles series than those 
of any other group. It lies toward the eastern boundary of the sec- 
tion in which the Miles soils occur, has been developed under a higher 
rainfall, and is therefore a better soil than the average of this series 
From the surface downward the soil profile is as follows: Dark 
reddish brown fine sandy loam with a slight tendency toward granu- 
lation, to 6 inches: reddish brown clay loam with some line sand. 
but cloddy and without granulation, <> to 24 inches; below the 24- 
inch depth a reddish calcareous clay. 
