42 
BULLETIN 618, U. S. DEPARTMENT OF AGRICULTURE. 
The Kubaiika (C. I. No. 1516) leads in yield by an annual average 
of about half a bushel in the 9-year period. This quantity is not 
significant, and there ^is little choice among the four durum varieties 
which were grown throughout this period. No varieties of any other 
groups of durum wheat were under experiment during the periods 
of years shown. 
RESULTS AT EDGELEY, X. DAK. 
The Edgeley substation of the North Dakota Agricultural Experi- 
ment Station is located on a light sandy loam soil with a shale subsoil. 
It lies at an altitude of 1 ,468 feet and has an average annual rainfall 
of IS inches for 15 years. The experiments were conducted inde- 
pendently by the North Dakota Agricultural Experiment Station, 
and the data presented are from the published annual reports of the 
substation. Experiments were begun in 1903 and have been pub- 
lished up to and including 1913. 
The data found in Table XX were obtained from the annual 
reports of the Edgeley substation of the North Dakota Agricultural 
Experiment Station for the years 1903 to 1913, inclusive (Thomp- 
son, 1904-1914), and the principal facts are portrayed graphically in 
figure 12. Eleven-year records are given for five durum varieties 
representing two different groups and for one variety in each of two 
groups of spring common wheat. No continued attempt was made 
to grow whiter wheat. The tabulated average yields show that all 
five of the durums outyielded the best spring common varieties in 
this period by 5 to 6 bushels per acre, which is equivalent to 30 per 
cent or more. 
Table XX. — Annual and average yields of five varieties of durum wheat and four varieties 
of common wheat grown at the Edgeley (N. Dak.) substation during periods of varying 
length in the eleven years from 1903 to 1913, inclusive. 
Class, group, and variety. 
C.I. 
No. 
Durum: 
Kubanka — 
Arnautka 3693 
Pererodka 1350 
Gharnovka 1443 
Kubanka 1440 
Velvet Don— Velvet Don. 1445 
Common: 
Preston— Preston ! 2058 
Bluestem— Havne> 3021 
Fife— Rysting 3)22 
Edge- 
lev 
No. 
Yield per acre (bushels). 
1903 
19.4 
21-4 
20-6 
IS. 2 
20.3 
188 
2 15. 1 
1904 
31.3 
25.0 
30 
21 
35.2 
11.6 
11.6 
1903 
1908,1907 
27. 
23. 
23. 
4 21. 
2,19. 
3 1". 
I 12. 
2 13. 8 
8 11. 
S 12. 5 
4 13. 2 
3,15.6 
1909 
.5 27.6 
.729-0 
. 9 28. 5 
.3128.5 
.3,29.6 
.617.3 
.6 19.4 
.1,20.3 
1910 
7.9 
: m 
1912 
32.9 
31.3 
22.6 
33.4 
0,23. 
3.2121.6 
2 
1 
1913 
Average. 
years . 
"190S 
to 
1913. 
11 
years, 
" 1903 
to 
1913. 
2o.2 
25.1 
28. 6 
25. 1 
21.5 
36. 
26.4 21.5 
6:21.7,25.2 
17.2 
17.5 
16.3 
17.3 
15.0 
14.4 
14.3 
14.2 
21.5 
20 7 
20.4 
20.1 
20.3 
15.0 
14.9 
