18 
BULLETIN 1306, U. S. DEPARTMENT OE AGRICULTURE 
15. No wilt or other disease appeared to any appreciable extent. 
Russian thistles usually became quite thick by the end of the season, 
decreasing the yield and making the crop difficult to handle. 
Table 14. — Annual and average yields of barley varieties at the Sheridan Field 
Station for the seven years from 1917 to 1923, inclusive 
C.L 
No. 
Yields per acre (bushels) 
Average 
Class and variety 
1917 
1918 
1919 
1920 
1921 
1922 
1923 
1917 to 
1923 
1921 to 
1923 
2-rowed: 
White Smyrna . . 
195 
531 
187 
261 
690 
936 
24.7 
13.4 
11.8 
20.8 
18.2 
18.3 
12.1 
10.3 
26.5 
30.9 
35.1 
17.9 
26.7 
33.1 
28.5 
13.0 








29.4 
21.1 
21.3 
19.2 
24.0 
23.9 
22.9 
10.4 
3.9 
2.7 
4.6 
2.5 
2.1 
2.5 
1.6 
22.9 
30.2 
25.8 
15.5 
27.1 
31.3 
26.2 
52.8 
45.0 
51.1 
46.1 
57.0 
68.1 
57.5 
22.9 
20.5 
21.4 
17.4 
22.2 
25.3 
21.3 
26.5 
Hannchen 
26 
Svanhals 
27.2 
6-rowed: 
Club Mariout- 
21.4 
Coast 
28.7 
Trebi _ 
34.0 
Manchuria 
244 
28.4 
Nepal—. - 
595 
1311 
926 
riynn 
3.6 
3.3 
18.2 
33.8 
44.7 
55.6 
22.2 
Horn 
30.9 
Work with flax is still being conducted in connection with the 
experiments with crop rotations and tillage methods. As shown in 
the discussion of that work, fair yields were obtained in 1922 and 1923 
when the crop was grown in rotations, and it seems probable that 
with the proper rotation and tillage methods profitable yields of flax 
may be secured. 
Table 15. — Annual and average yields of flax varieties at the Sheridan Field 
Station for the four years from 1917 to 1920, inclusive 
Variety 
C.I. 
No. 
Yields per acre (bushels) 
1917 
1918 
1919 
1920 
3.8 
8.0 

3.3 
2.9 
8.4 

5.0 
2.1 
8.1 

4.9 
2.6 
7.0 

4.3 
2.9 
8.3 

4.5 
Average 
Damont (North Dakota No. 1215) 
North Dakota Resistant No. 52... 
Primost (Minnesota No. 25) 
North Dakota Resistant No. 114.. 
Reserve (North Dakota No. 155).. 
3.8 
4.1 
3.8 
3.5 
3.9 
CORN 
A big factor with respect to the adaptability of different varieties 
of corn is the length of the frost-free period and the time available in 
the fall for ripening before a killing frost. As was noted earlier in 
this bulletin, the date of the first killing frost in the fall is quite 
variable. The conditions at the station probably are fairly typical 
of the greater part of the section in this respect, but in some seasons 
there has been considerable difference even within a short distance 
of the station. Generally when there has been a difference the 
killing frost has occurred at the station earlier than over much of the 
immediately surrounding territory. 
Table 16 shows the total yield of fodder, including grain, and the 
yield of grain produced each year by eight varieties of corn, repre- 
sentative of the various types grown. Averages for the two periods 
