EXPERIMENTS WITH DURUM WHEAT. 
23 
three periods of years mentioned. During the last five years of the 
test, however, the Kubanka has the advantage. 
The results show that durum wheats of the Kubanka group are 
profitable varieties for the Big Sioux Valley. They have outyielded 
all spring common wheats except Marquis. 
Table VII . — Annual and average yields of eight varieties of durum wheat and five varieties 
of common ivheat grown at the South Dakota Agricultural Experiment Station, Brook- 
ings, S. Dak., during periods of varying length in the thirteen years from 1904 to 1916, 
inclusive. 
[Data obtained in cooperation with, the South Dakota Agricultural Experiment Station.] 
Class, group, and 
variety. 
C.I. 
No. 
Yield per acre (bushels). 
1904 
1905 1906 1907 1908 
190919101911 1912 1913 
1914 
1015 
Average. 
1916 
years, years, 
1904 
to 
1908. 
1904 
to 
1912. 
12 
vears , 
"1905 
to 
1916. 
Durum: 
Kubanka— 
Arnautka. 
Do. 
Kubanka. . 
Do. 
Do. 
Do. 
Gharnovka 
Kubanka. . 
Common: 
1 'reston— Pres- 
ton 
Fife— 
Marouis . . . 
Rysting... 
B 1 u e s t e m— 
Haynes 
Crimean (win- 
ter)— Turkey 
1494 26. 25. 35. 8 20. 8 25. 8 16. 5 
I 1493 23.5 25.0 36.4 17.5 23.1,17.3 
144018. 8|16. 3i28. 6 14. 5|16. 1 11. 8 
1541 18. 6 16. 5'30. 4 12. 715. 818. 
151619.3 20.8:30.3; 6.212.815.7 
1354 21. 18. 8|38. 5 15. 6 16. 
1546116. 122. 2 32. 5 13. 8:20.1 
1490 22.518 5128 411.112.6 
3081 
3641 
3022 
2874 
3055 
18.3 22.3 10.915.0 
15.8 23.4 
16.3,21 8 
21.0 22.0' 8.0 
I I 
12.0 4.0 
11.0 
12.7 1.2 
9.2 3.8 
5.5 2.8 
26.1 
31.0 
28.0 
21.6 
11.2 
15.6 
22.5 
17." 6 
all.l 
ii.6 
21. 
19.0 2.8 
18.5 
27.612. 
7.3 14.915.5 
8.4 11.616.9 
9.4 (d) 14.4 
16.9 3.0 
15.7 2.8 
(d) ' (d) 
16.8 
cl5.8 
29.3 
26.7 
25.1 
18.9 
18.8 
17.9 
22.0 
20.9 
18.6 
21.3 
20.5 
16.4 
16.3 
15.8 
19.7 
3 15. S 
69.2 
2.5 
30.8 
Is. 3 
26.7 
&7.5 
12.5 
43.3 
7.5 
7.2 
62.6 
.6 
26.1 
16.2 
12.7 
12.1 
a Not grown; vield of Arnautka (C. I. No. 4064), a pure line selection from C. I. No. 1494, substituted.' 
b Not grown; yield of Glyndon (C. I. No. 2S73) substituted. 
c Not grown; yield of Haynes (Minn. No. 185) substituted. 
d Winter wheats not grown. 
RESULTS AT ASHLAND, WIS. 
Ashland, as seen in Table II (p. 15), lies on the Superior red clay 
at the low altitude of 615 feet above sea level. The average annual 
rainfall is 28.4 inches in a 16-year period. The experiments pre- 
sented in Table VIII and shown graphically in figure 8 were con- 
ducted by the Wisconsin Agricultural Experiment Station. The 
data have been taken from Bulletin 233 of that station (Delwiche 
andLeith, 1913). 
The experiments continued during the four years from 1908 to 
1911, inclusive. The yields of one durum, Kubanka, and three 
common varieties, representing three leading groups of hard spring 
common wheat, are presented. One winter wheat, Kharkof, of the 
Crimean group, also was grown. Since Ashland is near the northern 
edge of the winter-wheat belt, it is not surprising that the Kharkof 
does not excel all the spring varieties. 
