CROP ROTATION AND CULTURAL METHODS AT AKRON, COLO. 
9 
Yellow milo, Dakota Amber sorgo, Giant winter rye, and Colorado 
field peas. 
The rates per acre of seeding the various crops were — spring wheat, 
4 pecks; winter wheat, 3 pecks; oats, 5 pecks; barley, 5 pecks; win- 
ter rye, 4 pecks; peas, 2 bushels; bromegrass, 15 pounds; alfalfa, 15 
pounds; and sweet clover, 10 pounds. Sorgo, milo, and kafir were 
planted in 42-inch rows with the plants spaced 6 inches apart in the 
row, and corn in 42-inch rows with the plants spaced 24 inches apart. 
The average dates of seeding the several crops were — winter wheat 
and winter rye, September 21; spring wheat, March 29; oats, April 
3; barley, April 6; peas, April 12; corn, May 17; and the sorghums 
June 3. Sweet clover and bromegrass sown with spring wheat or 
oats as a nurse crop were sown at the same time as the crop. Alfalfa 
for many years was seeded early in the spring, but the date has been 
changed recently to about August 1. 
AVERAGE YIELDS 
The average yield of each crop for each year of the 15-year period 
from 1909 to 1923, inclusive, is shown in Table 4. These averages 
were obtained for each crop each year by averaging the individual 
yields from all the plats growing the given crop. Thus, the average 
yield is made up of about an equal number oi yields from the most 
successful methods, less successful methods, and poor methods. The 
winter-wheat average for the year 1920 is given as 14.2 bushels per 
acre. This figure is the average of the yield from 2 plats on fallow, 
3 on disked corn ground, 4 on rye used as green manure, 4 on peas 
used as green manure, and 4 continuously cropped to winter wheat 
by various cultural treatments. The annual average yield for each 
of the other crops was similarly obtained. The 15-year averages are 
a gauge of the cropping possibilities of this region. The average 
individual using average methods may well hope to equal these 
yields, and the careful individual using only the best methods may 
well hope to better them. 
Table 4.— Average annual yields from all grain and sorghum plats in the rotation 
block at the Akwn Field Station during the 15-year period from 1909 to 1928, 
inclusive 
Acre yields of grain (bushels) 
Acre yields of total crop (pounds) 
Year 
Winter 
wheat 
Spring 
wheat 
Oats 
Barley 
Corn 
Corn 
Kafir 
Milo 
Sorgo 
1909 
1 14. 1 
14.1 
4.1 
33.8 
7.4 
25.5 
21.8 
13.7 
6.6 
5.3 
15.0 
14.2 
12.3 
.6 
2.9 
13.8 
9.2 
3.7 
19.7 
3.9 
16.6 
27.3 
7.1 
13.2 
1.1 
6.3 
18.7 
2.1 
6.9 
4.6 
19.4 
13.3 
4.0 
42.3 
6.6 
42.2 
64.3 
11.3 
26.2 
1.4 
16.9 
44.2 
13.1 
15.9 
14.4 
19.8 
12.0 
6.1 
30.8 
6.3 
37.8 
55.0 
11.0 
26.4 
4.3 
18.3 
32.1 
111 
11.7 
18.6 
24.9 
10.9 
3.2 
30.9 
3.9 
11.3 
29.2 
1.1 
15.2 
12.4 
4.5 
35.6 
6.3 
11.2 
17.9 
4,570 
2,237 
1,367 
4,535 
1,607 
2,730 
3,585 
930 
2,798 
3,076 
1,620 
4,356 
1,223 
2,465 
3,471 
10, 200 
2,940 
3,356 
4,040 
2,274 
2,474 
2,388 
1,514 
3,312 
3,640 
4,124 
4,528 
2,286 
5,520 
2,420 
3,940 
2,864 
1,713 
4,116 
1,540 
2,582 
2,152 
1,252 
2,080 
4,890 
2,436 
4,380 
1,472 
7,950 
3,620 
1,300 
6,100 
1,400 
3,560 
5,860 
550 
2,350 
3,200 
2,150 
6,270 
1,560 
4,767 
4,775 
1910 . 
1911 
1912.- 
1913 
1914 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
1922 
1923 
Average . 
12.8 
10.3 
22.4 
20.3 
14.6 
2,705 
3,668 
2,724 
3,694 
The yield given for 1909 is of spring wheat seeded after the winter wheat winterkilled. 
13451°— 25f 2 
