SPRING WHEAT ON THE NORTHERN GEEAT PLAINS. 
19 
Table VI. — Yields of 11 varieties of spring wheat grown at the Fort Assiniboine 
Field Station, Havre, Mont., during the 4-year period from 1916 to 1919, inclusive, 
compared with the Marquis variety for the years grown. 
[Data obtained 
m cooperation with the Montana Agricultural Experiment Station.] 
C.I. 
No. 
Yield per acre 
(bushels). 
Class, group, and variety. 
1916 
(2 plats). 
1917 
(3 plats). 
1918 
(3 plats). 
1919 
(3 plats). 
Average. 
1916 
to 
1919. 
Difference 
from 
Marquis. 
COMMON. 
Fife: 
Marauis 
3641 
3697 
2874 
4324 
3081 
2398 
4323 
4064 
1440 
1350 
1584 
33.3±0 
10.3±0.2 
10.7±0.3 
8.9±0.2 
11.3±0.2 
12.2±0.3 
9.6±0.2 
10.0±0 
7.2±0.2 
11.7±0 
2.9±0.3 
10.8±0.3 
12.0±0.2 
3.5±0.7 
4.6±0.4 
2. 2±0. 2 
2.8±0.3 
3.3±0.3 
3.4±0.1 
1.4±0.3 
5.4±0.2 
5.2±0.8 
14.6 
17.4 
9.0 
"*"i5*2* 
+0.8±0. 2 
Bluestem: 
— 1.5±0.1 
Preston: 
Pioneer 
-1.0±0.3 
8.9±0.2 
13.8±0.2 
a 5.0 
12.3±0.3 
10.7±0.6 
-1.9±0.9 
Miscellaneous: 
Gals;alos 
40.6±0.5 
a 26. 6 
+2.8±1.3 
Prelude 
— 5.6±0.9 
DURUM. 
Kubanka: 
Arnautka 
-M.l±0.7 
TTnhanka 
33.0±4.2 
37.0±0.3 
41.0±0.8 
+ .6±0.3 
Peliss: 
Peliss 
11.9±0. 1 
10.8±0.3 
6.6±0.5 
17.6 
+3.0±1.3 
One plat only. 
RESULTS AT MOCCASIX, MONT. 
The Judith Basin Substation of the Montana Agricultural Experi- 
ment Station, Moccasin, Mont., is located on a dark clay-loam soil 
with a gravelly subsoil. It is at an altitude of 4,228 feet, and the 
average annual precipitation in 23 years was 16.45 inches. 
Cereal experiments cooperative between the Montana Agricultural 
Experiment Station and the Office of Cereal Investigations have been 
conducted at Moccasin since 1908. Yields are shown in Table VII. 
The average acre yields in the four years from 1908 to 1911 for 
eight varieties grown in that period show that durum varieties out- 
yielded all common varieties, with the exception of Galgalos, a white 
wheat. This variety outyielded all others, with an average of 24.4 
bushels per acre. For the 7-year period from 1913 to 1919 in which 
Marquis has been grown, it has yielded at the rate of 24.2 bushels per 
acre. Durum varieties have not consistently outyielded it. In 
1913, 1915, and 1916 the Marquis outyielded ail varieties of durum 
wheat. The Peliss variety of durum wheat has been the highest 
yielding variety during the entire period, yielding 0.7 bushel more 
than Marquis. During the same period the Kubanka (C. I. No. 
1440) yielded only 0.2 bushel more than Marquis. 
