34 
BULLETIN 618, U. S. DEPARTMENT OF AGRICULTURE. 
data are for the nine years from 1908 to 1916, inclusive. Yields 
are shown for 11 durum varieties tested during seven of these years 
and of four for all nine years. The most striking fact is the close 
agreement in yield of the best durum varieties and the Crimean 
winter wheat. The average yield of the Crimean is reduced by its 
complete failure in 1909. This was due, in part, to a treatment of 
the seed with formaldehyde which was too severe, resulting in a 
poor stand, which entirely winterkilled. 
Among the spring wheats, the ordinary Fife and Bluestem varie- 
ties do not yield well at Akron, so the Fife group is represented by 
Ghirka Spring, and in the last four years by Marquis also. The 
Bluestem group is absent. The Preston group is represented by 
Erivan from the Caucasus region. Neither Ghirka Spring nor 
Erivan is able to compete with the best durum varieties in yield. 
From the records made by the Marquis in the four years since it 
was included in the test, it may prove to be more nearly equal to 
the durums than any other spring common varieties. From the 
data now available, however, the durums are the best spring wheats 
to grow at this station. 
Table XIV. — Annual and average yield of eleven varieties of durum wheat and four 
varieties of common wheat grown at the Akron Field Station, Akron, Colo., during 
periods of varying length in the nine years from 1908 to 1916, inclusive. 
[Data obtained in cooperation with the Office of Dry-Land Agriculture.] 
C.I. 
No. 
Yield per acre (bushels). 
1908 
1909 
1910 
1911 
1912 
1913 
1914 
1915 
1916 
Average. 
Class, group, and variety. 
7 
vears, 
1908 
to 
1914. 
7 
years, 
1910 
to 
1916. 
9 
vears, 
1908 
to 
1916. 
Durum: 
1584 
4064 
1493 
1520 
1440 
1444 
1447 
1354 
24.7 
23.6 
15,8 
19.5 
16.6 
19.9 
17.1 
15.0 
13.1 
21.3 
19.3 
13.5 
15.3 
36.3 
18.8 
10.6 
15.7 
10.6 
35.6 
37.3 
27 5 
10.5 
10.6 
10.5 
10.6 
5.1 
5.3 
3.3 
13.6 
14.1 
7.3 
10.0 
12.6 
14.0 
7.5 
26.6 
25.0 
27.6 
19.5 
20.7 
22.5 
23.7 
22.7 
24.0 
25.3 
21.2 
28.3 
19.3 
19.7 
31.6 
27.6 
27.9 
26.7 
27.6 
14.4 
11.4 
10.7 
11.4 
12.9 
21.1 
"20.'i 
18.5 
16.2 
20.9 
19.3 
19.2 
17.7 
20.5 
19.0 
21.3 
18.3 
20.7 
21.0 
18.7 
16.7 
16.8 
21.5 
Kubanka— 
Do 
26.9 
31.1 
23.8 
32.8 
29.1 
27.2 
20.8 
19.4 
9.3 
25.1 
20.9 
18.0 
14.2 
21.1 
20.8 

23.8 
19.9 
Beloturka 
8.0 21.1 
9. 25. 1 
18.6 
17.1 
10.8 
9.3 
11.7 
10.6 
10.0 
7.9 
17.9 
8.5 
34.2 
36.5 
19.8 
19.0 
33.3 
33.0 
33.1 
23.4 
1593 22.9 
1445 1 33.3 
3024 24.8 
Velvet Don— Velvet Don.. 
Kahla — Purple 

Common: 
Crimean(winter)— Crimean 
Fife— Ghirka Spring 
Marquis 
Preston — Erivan 
1436 
1517 
3641 
2397 
19.1 
20.6 
26.6 
22.6 
26.5 
19.5 
20.5 
7.5 
11.8 
7.8 
25.0 
16. 3 
21.6 
17.6 
19.3 
26.3 
15.2 
11.9 
20.7 
12.0 
19.3 
17.8 
15.2 
16.9 
Considering only the durum wheats, Pelissier leads in the first 
7-year average and the 9-year average and almost ties with Arnautka 
for first place in the second 7-year average. In the Kubanka group 
a pure line, Arnautka 6Pl (C. I. No. 4064), a selection of Arnautka 
