6 BULLETIN 1315, XJ. S. DEPARTMENT OF AGRICULTURE 
Table 2. — Yields of spring wheat grown by different methods at the Archer Field 
Station from 1914 to 1923, inclusive 
Plats 
aver- 
aged 
Yields per acre 
(bushels) 
Treatment and previous 
crop 
1914 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
1922 
1923 
Aver- 
age, 
1914 
to 
1923 
Fall plowed: 
Corn 
1 
2 
1 
5.7 
4.3 
7.5 
20.3 
24.3 
23.7 
1.3 
2.3 
2.4 
13.2 
13.4 
13.6 
20.7 
20.5 
13.2 
1.7 
.9 
2.5 
2.3 
4.1 
3.1 
8.3 
5.9 
4.5 
0.3 
.9 
1.5 
9.8 
13.5 
7.3 
8.4 
Oats 
9.0 
Spring wheat,. __ 
7.9 
Total or average 
4 
5.5 
23.1 
2.1 
13.4 
18.7 
1.5 
3.4 
6.2 
.9 
11.0 
8.6 
Spring plowed: 
1 
1 
1 
1 
9.4 
4.6 
6.8 
26.7 
23.7 
26.8 
26.3 
.9 
1.6 
2.3 
4.3 
17.0 
11.0 
15.6 
12.2 
22.3 
22.7 
18.4 
25.2 
3.3 
1.5 
3.5 
2.9 
2.7 
3.0 
1.7 
2.1 
11.7 
9.3 
6.2 
10.3 
.9 
.2 
1.3 
1.3 
15.3 
10.5 
10.7 
9.0 
11.0 
Oats. 
8.8 
Spring wheat._ i.._. 
9.3 
Flax 
i 10.4 
Total or average 
4 
6.9 
25.9 
2.3 
14.0 
22.2 
2.8 
2.4 
9.4 
.9 
11.4 
9.8 
Subsoiled: Wheat 
1 
1 
9 
5.8 
5.8 
6.3 
25.0 
23.5 
25.5 
1.0 
.8 
5.0 
16.6 
14.3 
15.6 
12.0 
8.8 
27.4 
2.0 
3.2 
4.9 
2.9 
2.7 
4.0 
3.8 
4.7 
11.3 
7.5 
3.8 
3.3 
13.5 
6.8 
14.7 
9.0 
Listed: Wheat 
7.4 
Disked: Corn 
11.8 
Green manured: 
With rye 
1 
1 
4.3 
9.7 
24.2 
26.5 
5.9 
11.4 
14.2 
16.5 
22.5 
38.1 
2.1 
2.0 
4.8 
5.2 
13.3 
9.2 
.7 
4.0 
10.8 
10.2 
10.3 
With peas 
13.3 
Total or average 
2 
7.0 
25.4 
8.7 
15.4 
30.3 
2.1 
5.0 
11.3 
2.4 
10.5 
11.8 
Fallowed 
9 
8.8 
24.5 
4.3 
14.7 
23.0 
4.8 
3.5 
11.6 
6.4 
16.1 
11.8 
Average of all 30 plats 2 

7.0 
24.8 
4.0 
14.8 
23.3 
3.8 
3.5 
10.0 
3.7 
13.6 
10.9 
Average of 9 years. 
Only 29 plats in 1914. 
In the rotations nine plats of spring wheat are grown each year 
on disked corn ground. The average yield for the 10 years for which 
results have been obtained was 11.8 bushels per acre, exactly the same 
as the average on fallow. Wheat on corn ground plowed in the 
spring averaged 11 bushels per acre and on corn ground plowed in 
the fall 8.4 bushels per acre. 
The yields on fallow, green manures, and corn ground averaged 
higher as a group than those following wheat or other small grains. 
Within the latter group the range of yields was not great. Following 
oats the yield on fall plowing averaged slightly higher than on spring 
plowing. On the four plats cropped continuously to wheat the one 
plowed in the spring averaged 9.3 bushels, the one subsoiled 9 bushels, 
the one fall-plowed 7.9 bushels, and the one listed in the fall 7.4 
bushels per acre. One plat on spring plowing following flax averaged 
10.4 bushels for the nine years from 1915 to 1923, inclusive. In 
1914, the year lacking in the record of this plat, the yields of all 
plats were somewhat below the average. 
RESULTS WITH WINTER WHEAT 
When the experiments with rotations and cultural methods were 
planned in 1913, it was impossible to determine from the informa- 
tion available whether spring wheat or winter wheat should be 
given the greater attention. The results show clearly the low value 
of winter wheat under the methods of cultivation generally prac- 
ticed. It has been necessary to reseed all or most plats in 7 years 
out of 10. The stand of winter wheat has been lost by winterkilling 
