EXPERIMENTS WITH DURUM WHEAT. 
57 
inches on the basis of 44-year records. The substation was estab- 
lished to conduct experiments with cereals and was maintained 
cooperatively by the California Agricultural Experiment Station 
and the Office of Cereal Investigations. 
Table XXXII. — Annual and average yields of six varieties of durum wheat and four 
varieties of common wheat grown at the Modesto (Cal.) substation during periods of 
varying length in the three years from 1907 to 1909, inclusive. 
[Data obtained in cooperation with the California Agricultural Experiment Station.] 
C.I. 
No. 
Yield 
per acre (bushels). 
Class, group, and variety. 
1907 
1908 
1909 
Average. 
2 years, \ a ^ 
i Q08 years, 
™l ,1907 to 
i qnq 
1909. iyuy - 
Durum: 
Kubanka— 
2235 
2221 
2246 
2096 
2247 
1597 
1596 
1970 
3019 
2989 
9.7 
"7.T 
16.2 
9.0 
13.1 
6.7 
44.7 
26.8 
30.8 
31.8 
32.8 
32.8 
67.3 
69.3 
51.3 
33.2 
33.3 
26.5 
21.8 
18.0 
14.2 
13.3 
56.0 
55.0 
44.0 
39.1 
39.0 29 3 
26.7 L . 
Do 
26.3 i 
24.9 
Velvet Don — Velvet Don 
23.5 
23.1 
61.7 
62.2 
47.7 
36.2 
IS. 1 
Pelissier — Medeah 
Common: 
Preston — Fretes 
46.5 
44.4 
36 1 
Fife — Power 
26.3 
The yields obtained in experiments continued for three years, 
1907 to 1909, inclusive, are shown in Table XXXII, and the principal 
facts are shown graphically in figure 13. Six varieties of durum 
wheat, belonging to three separate groups, were included during 
two years, and two of them during all three years. Four varieties of 
common wheat, two with hard red kernels and two with soft white 
kernels, were compared with the durum varieties. Among the 
durums, Marouani easily takes first place. Here, as at Chico, how- 
ever, only a glance is needed to show the marked superiority of the 
common wheats. As at other points west of the Rocky Mountains, 
durum varieties are not the best adapted wheats for growing in 
California. 
SUMMARY OF RESULTS. 
The average yield of the highest yielding durum wheat 'at each 
of the 30 stations discussed in this bulletin is presented in Table 
XXXIII. In parallel columns is shown the average yield of the best 
variety in each of the groups of common wheat, both winter and 
spring, which were grown at the stations in the same period of years. 
The length of the periods is shown in the second column. 
