SPRING WHEAT ON THE NORTHERN GREAT PLAINS. 
15 
Table III. — Yields of 27 varieties and strains of spring wheat grown at the Williston (N. 
Dak.) Substation, during the 6-year period from 1913 to 1918, inclusive, with average 
yields in the 5-year period from 1908 to 1912, inclusive, and the average differences from 
the Marquis variety for the years grown. 
[Data obtained in cooperation with the North Dakota 
Agricultural Experiment Station.] 
* 
CI. 
No. 
Yield per acre (bushels). 
Class, group, and 
Aver- 
age, 
1908 
to 
1912. 
1913 
(1 
plat). 
1914 
(2 plats). 
1915 
(2 plats). 
1916 
(2 plats). 
1917 
(2 plats). 
1918 (2 
plats). 
Average. 
variety. 
1913 
to 
1918. 
Differ- 
ence 
from 
Marquis. 
COMMON. 
Fife: 
3641 
1517 
4413 
2873 
3694 
3697 
3083 
2874 
3021 
4324 
3081 
3698 
3315 
2492 
2398 
3690 
4323 
3703 
3700 
5284 
3693 
4064 
5295 
1440 
4063 
3320 
3322 
6 29.'3 
" "2i.'5 
23.3 
24.0 
23.2 
21.4 
22.5 
o29.0 
22.2 
"*28.2 
28.7 
28.7 
30.7 
30.0 
52. 5 ±6. 7 
40.4±3.9 
47.1±3.1 
49.2±2.1 
47.9±2.4 
51.3±3.2 
47.5±0.7 
42.5 + 
40.6±0.2 
42.7±1.1 
46.1±1.1 
44.1±0.6 
43.9±0.4 
45.1±0.3 
44.6±1.0 
42.9±0.2 
45.5±1.3 
42.9+.0.2 
42.1±2.0 
43.4±1.7 
44. 2±0. 2 
42.7±0.3 
35.0±0.8 
37.7+0.3 
40.2±0.7 
29.0+0.8 
30.5±0.8 
31.8±1.0 
28.5±0.4 
28.4+0.8 
18.5±5.2 
19.3±5. 1 
20.5±5.5 
20.3±3.7 
5.5+0.7 
7.'6±i.'3 
5.7 + 
30.2 
"29.'4 
29.3 
31.3 
29.9 
28.5 
Ghirka Spring 
Ghirka Spring N o. 4 
Glyndon 
-2.7+2.3 
+1.9 + 1.2 
- .8+1.0 
Red Fife 
18.3+2.5 6.3+0.3 
— .9 + 0.9 
Power 
23.6±8.5 
20.6+2.8 
7.5±1.4 
7.5+0.4 
+1.2+1.0 
Bluestem: 
Dakota 
— .3 + 1.4 
Haynes 
19.9+0.2 7.5+0.7 
—1.7 + 1.7 
Do 
29.246.3-1-0.4 
— .4+2.3 
Preston: 
Pioneer 
Preston 
36.7±1.4 
35.0±0.3 
35.0±0.3 
17.0+4.8 4.1+0.5 
23.0+2.5 5.5+0.7 
+ .3+0.8 
+1.5 + 0.7 
Do 
a24.3 
25.0 
46.3±1.1 
52.2±1.1 
46.7±0 
—1.9+1.6 
Ladoga: 
Huron 
+1.7+1.6 
Manchuria 
VM.'o 
19.7 
27.7 
30.0 
39.5±1.0 
—2.1 + 2.7 
Miscellaneous: 
Galgalos 
Humpback 
Prelude 
30.4+0.5 
47.7±0.3 
29.5±1.3 
26.0±1.7 
14.5+6.0 
4.7±0.6 
— 5.i±i.3 
Regenerated Defi- 
ance 
—1.0+6.8 
World Beater 
27.0 
38.8±0.4 
-7.9+4.9 
DURUM. 
Kubanka: 
Acme 
22.0±1.7 
7.7±0.3 
+2.9+0.5 
Arnautka 
23.4 
" *24."5 
34.7 47.2±6.3 45.5±i.3 
50.0±2.145.7±1.4 
35. 054. 6+2. 4 ; 49. 4+0. 5 
33.053.84-3.247.3 + 1.1 
37.4±0.3 
37. 2±0. 7 
+1.9 + 1.8 
Do 
21.1+0.9 
6.6+0.1 
6.9+0.1 
5.3+0.3 
6.0+0.6 
7.8±0.7 
8.4+0.2 
'34.'4 
32.3 
+1.7+0.8 
Buford 
37.2±0.7 23.5±0.4 
36.0±0.618.3 + 0.8 
+4.3+0.9 
IT Kubanka 
+2.1 + 0.8 
Kubanka No. 8 
Monad 
45.0±0.7 
45.9±1.6 
37.2±0.1 
19.7 + 1.4 
25.6+1.9 
23.6+2.8 
+ .3 + 1.3 
+4.7+2.0 
Red Durum: 
D-5 
+4. 0+0. 9 
a Probable error ±0.7. b Average for only 4 years, 1909 to 1912. c Average for only 3 years, 1910 to 1912. 
RESULTS AT DICKINSON, N. DAK. 
The Dickinson Substation of the North Dakota Agricultural 
Experiment Station is located on the border of the Heart River valley, 
near Dickinson, N. Dak., on a soil varying from sandy loam to clay 
loam. The elevation is 2,453 feet, and the average annual precipita- 
tion has been 15.64 inches in a 27-year period. The varietal experi- 
ments conducted cooperatively by the North Dakota Agricultural 
Experiment Station and the Office of Cereal Investigations were 
started in 1907. The yields obtained are shown in Table IV. 
