EXPERIMENTS WITH DURUM WHEAT. 
53 
wheat to be 26 bushels, or an increase of 150 per cent over that of 
Kubanka. Durum wheats were also tested at this station from fall 
sowing, but the yields obtained were no larger than from spring 
sowing. 
RESULTS AT ABERDEEN, IDAHO. . 
The Aberdeen substation is located in the Snake River Plains of 
southern Idaho on a sandy clay-loam soil containing some volcanic-ash 
material. The altitude is 4,400 feet. The average annual precipi- 
tation in the past four years has been only 9.5 inches, the lowest 
recorded for any of the stations west of the Rocky Mountains. The 
substation is maintained cooperatively by the Idaho Agricultural 
Experiment Station and the Office of Cereal Investigations. 
The results obtained at Aberdeen are found in Table XXVIII and 
the principal data in graphic form in figure 13. Data on durum 
wheats are available for only the last two years. These wheats are 
compared with a representative variety from each of six different 
groups of spring wheat and the Crimean group of winter wheat. The 
average yields of all varieties are low in this 2-year period. Only 
three out of nine varieties exceed 10 bushels per acre. The yields of 
the durum are below the general average, being exceeded, or at least 
equaled, by five of the six spring common varieties. Although data 
for only two years are not conclusive, there is little reason for expect- 
ing the durum varieties to be worthy of being grown in the Snake 
River Basin. 
Table XXVIII. — Annual and average yields of five varieties of durum wheat and seven 
varieties of common wheat grown at the Aberdeen (Idaho) Branch Experiment Station 
during 1915 and 1916. 
[Data obtained in cooperation with the Idaho Agricultural Experiment Station.] 
Class, group, and variety. 
G.I. 
No. 
Yield per acre 
(bushels). 
Class, group, and variety. 
C.I. 
No. 
Yield per acre 
(bushels). 
1915 
1916 
Aver- 
age. 
1915 
1916 
Aver- 
age. 
Durum: 
Kubanka— 
Arnautka 
Do 
4064 
1493 
1516 
1520 
1584 
1442 
7.2 
4.5 
6.3 
5.4 
6.3 
21.1 
8.3 
7.8 
Common — Continued. 
White Australian- 
Pacific Bluestem... 
Preston— Fretes 
Fife — Marquis 
Baart — Early Baart. 
Little Club — Little 
Club 
4067 
1596 
3276 
1697 
4066 
2874 
9.0 
10.8 
6.3 
7.5 
7.2 
5.4 
12.3 
9.7 
11.3 
9.7 
8.3 
8.0 
10.7 
10.3 
Kubanka 
8.7 
7.5 
8.8 
8.6 
Cqmmon: 
Crimean (winter) — 
Kharkof 
3.5 
12.3 
7.8 
Bluestem— Haynes. . 
6.7 
The 2-year average yield of the Crimean variety Kharkof also is 
low, although its 12.3 bushels is the highest average of all. This is 
lower than observation and experience show may reasonably be 
expected from these wheats in this section. 
