CROP ROTATION AND CULTURAL METHODS AT AKRON, COLO. 19 
Table 9. — Yields of corn under different cultural methods at the Akron Field Station 
for the 15 years from 1909 to 1928, inclusive 
Treatment and previous 
crop 
Plats 
aver- 
aged 
Yields per acre (bushels) 
1909 
1910 
1911 
1912 
1913 
1914 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
1922 
1923 
Aver- 
age 
Fall plowed: 
Oats 
6 
3 
3 
1 
26.8 
22.2 
22.7 
27.3 
8.0 
6.1 
8.7 
18.3 
7.0 
5.8 
1.8 

30.1 
32.5 
27.4 
46.9 
1.0 


9.9 
11.0 
31 Q 



4.8 
12.7 
13.1 
13.7 
21.9 
7.9 
8.9 
8.8 
12.6 
6.4 
35 1 
4.8 
5.5 
6.6 
3.1 
8.8 
9.8 
8.2 
15.3 
13.0 
17.3 
16.1 
19.9 
13.6 
Spring wheat 
Winter wheat 
Corn 
7.0 31.1 
8. 2 29. 6 
17.3129.2 
4. 5 35. 1 
3. 8l3l. 7 
5. 36. 9 
13.3 
12.5 
17.9 
Total or average. . - 
13 
24.8 
8.5 
5.0 
31.3 
1.2 
9.9 31.0 
.4 
13.7 
8.7 
5. 3 34. 4 
5.2 
9.4 
15.2 
13.6 
Spring plowed: 
Oats 
4 
1 
2 
2 
1 
25.9 
21.7 
21.1 
22.2 
30.0 
7.4 
16.6 
14.6 
10.7 
21.6 
.5 
?8 
2.6 
9.9 

9.2 
13.6 
11. 9'33. 5 
13. 9 30. 3 
11.3 30.9 
12. 2!28. 6 
15. 9 21. 9 




7.1 
13.2 
16 7 
10.3 
13 4 
. 9 38. 2 
5. 936. 9 
1. 3 35. 4 
3.2|41. 3 
4. 1 35. 5 
3.7 
9.5 
6.4 
8.5 
7.0 
8. 19. 5 
11. 7 15. 1 
7. 7 24. 5 
8. 9 25. 3 
14.719. 1 
13.6 
34. 9 
15.8 
Spring wheat 
Winter wheat 
.4 
.4 
1.3 
36.7 
29.3 
33.9 
15.0 
22.1 
?5 1 
11.5 
10.8 
13 1 
14.5 
15.5 
17.6 
Total or average... 
10 
24.2 
11.8 
.5 
31.3 
5.2 
12. 4130. 5 
.7 
16.9 
11.2 
2.3 
37.8 
35 9 
6.1 
3.5 
9. 2 21. 2 
15. o'l7. 9 
14.8 
Subsoiled: 
1 
1 
1 
1 
32.9 
22.4 
29.7 
25.0 
12.7 
15.1 
15.1 
21.4 

2.6 

12.9 
37.1 
27.2 
16.7 
33.6 
4.3 
10.7 
7.2 
13.8 
13.9 
11.6 
7.3 
18.6 
22.3 
14.4 
24.8 
19.6 
3.2 
1.7 
3.1 
9.7 
20.6 
6.9 
9.5 
27.4 
18.5 
36.4 
23.0 
32.6 
5 8 
16.2 
Fall listed: 
9.8 
6.1 
8.4 
31.9 
27.3 
40.1 
7. 7 24. 2 11. 5 
11. 20. 8 7. 2 
19. 29. 6 35. 3 
15.6 
Spring listed: 
Corn. 
13.9 
Fallowed ... 
23.1 
Average of all 27 
24.9 
10.9 
3.2 
30.9 
3.9 
11.3 
29.2 
1.1 
15 ? 
1? 4 
4 5 
35 6 
j | 
6. 3 11- 2'l7. 
14.6 
The average yields of corn on both fall plowing and spring plowing 
following wheat and oats ranged from 12.5 to 15.5 bushels per acre. 
The evidence is extensive, but it does not warrant a conclusion that 
any one of the small grains provides a preparation for corn that is 
either better or poorer than that provided by any other one of them. 
Comparisons between spring plowing and fall plowing, each follow- 
ing four crops, are offered. Bistinct differences are shown between 
them in different seasons, in favor sometimes of one and sometimes 
the other, but in the averages for the 15 years the differences are 
small. The 15-year average yield on 13 fall-plowed plats was 13.6 
bushels, and on 10 fairly comparable spring-plowed plats it was 
14.8 bushels. 
The average yield of corn stover in addition to the grain w T as 1,685 
pounds per acre. This with the 1,022 pounds of ears makes a total 
production of 2,707 pounds of feed per acre. Corn never failed to 
produce stover, but it averaged only 782 pounds per acre in 1921 
and 843 pounds in 1916. The highest average annual yield was 
2,827 pounds, in 1909. The highest 15-year average yield, 2,024 
pounds, was on fallow. The yields of the different preparations 
ranged from that down to 1,513 pounds on spring listing. 
RESULTS WITH OTHER CROPS 
Both kafir and milo were included in two rotations and three 
continuously cropped plats. Milo was discontinued after 1921. 
The range of methods to which these crops have been subjected 
should have developed whatever possibilities they may have for this 
section, the writer believes. 
