32 
BULLETIN 618, U. S. DEPARTMENT OF AGRICULTURE. 
RESULTS AT AMARILLO, TEX. 
The Amarillo Cereal Field Station is located in the center of the 
Texas Panhandle on a chocolate clay loam soil at an altitude of 
3,676 feet. The average annual precipitation for the past 24 years 
is 21.2 inches. The experiments are conducted by the Office of 
Cereal Investigations in cooperation with the Amarillo Chamber of 
Commerce. 
The data presented in Table XII and shown graphically in figure 
12 cover the 11-year period from 1906, when the station was estab- 
lished, to 1916, inclusive. Three varieties of durum wheat belong- 
ing to two different groups have been grown throughout this period. 
Table XII. — Annual and average yields of three varieties of durum wheat and four 
varieties of common wheat grown at the Cereal Field Station, Amarillo, Tex., during the 
eleven years from 1906 to 1916, inclusive. 
[Data obtained in 
cooperation with the Amarillo Chamber of Commerce.] 
C.I. 
No. 
Yield per acre (bushels). 
Class, group, and 
variety. 
1906 
1907 
1908 
1909 
1910 
1911 
1912 
1913 
1914 
1915 
1916 
Aver- 
age, 11 
years, 
1906 
to 
1916. 
Durum: 
Kubanka — 
Saragolla 
Marouani 
Kubanka 
Common: 
Crimean (winter- 
2228-1 
2235-1 
1440 
1558 
1395-2 
1596 
2398 
7.6 
5.3 
8.0 
25.8 
18.5 
5.1 
4.9 
8.5 
10.4 
4.3 
3.3 
1.4 
10.7 
10.6 
15.3 
16.8 
16.8 
23.2 
25.8 
19.5 
18.0 
6.5 
5.7 
5.9 


8.5 
7.5 
2.7 
2.8 
3.1 
10.2 
10.4 
3.6 
3.9 
11.1 
11.6 
9.3 
1.6 
.4 
9.0 
11.0 
14.0 
11.0 
14.5 
16.0 
14.3 
14.8 
13.7 
8.5 
3.9 
4.9 
6.5 
4.8 
4.5 
4.8 
12.7 
15.5 
12.5 
26.8 
23.0 
11.5 
8.7 
11.7 
14.3 
7.3 
19.2 
18.0 
9.5 
7.8 
5.5 
4.2 
3.9 
4.3 
6.7 
S.4 
1.6 
9.5 
9.2 
8.2 
12.4 
Mediterranean (win- 
ter)— Diehl-Medi- 
11.2 
Preston— Fretes 
Galgalos— Galgalos. . 
9.1 
8.4 
The yields of one representative of each of the hard red and the 
soft red groups of winter wheat and of each of two groups of spring 
wheat are tabulated for comparison. Climatic conditions are severe, 
and no yields are high. Winter varieties are better adapted and 
yield better than any spring wheat. Among the groups of spring 
wheat there is little choice from the standpoint of yield. The little 
difference that exists is in favor of the durum varieties, but it is in 
no way significant, nor is there any marked difference in the per- 
formance of the durum varieties. Saragolla and Marouani have a 
slight advantage over Kubanka, the variety which is best adapted 
at many of the northern stations. The two former varieties came 
from the Mediterranean district, but the latter is of Russian origin. 
