DRY FARMING IN SOUTHEASTERN WYOMING 7 
and by soil blowing. Soil blowing is perhaps the more important 
factor of the two. Winds are high in winter and spring and when 
the surface of the ground is bare and dry cause more or less soil 
movement. Even a limited movement exposes the crowns and roots 
and breaks the surfaces of the leaves. The plants are unable to 
survive the damage and the heavy spring freezes incident to the 
altitude. 
The annual and average yields of winter wheat, including reseed- 
ings to spring wheat, on the several preparations under trial are 
given in Table 3 and the averages shown graphically in Figure 3. 
The average yield of all plats was 10.2 bushels, a fraction of a bushel 
less than the corresponding average with spring wheat. The yield 
following peas as green manure was higher than that following rye 
as green manure. The yield on fallow was practically the same 
/iy^7~^Z?.' Sfi?/\S7Z£'se >^^f>?7= 
^/^/fuZT^ •' C?Q/e/V 
6 a /o 
/2 /<*■ 
Fig. 3.— Average acre yields of winter wheat, including reseedings to spring wheat, grown by different 
methods at the Archer Field Station for the 10 years from 1914 to 1923, inclusive 
as the yield following peas plowed under and was only 0.3 bushel 
more than the yield of spring wheat on fallow. Disked corn ground 
averaged 11 bushels per acre. Late fall plowing, early fall plowing, 
subsoiling, and listing were all under trial on land continuously 
cropped to winter wheat. The average acre yields of these four 
methods ranged from 7.4 bushels on both late fall plowing and on 
subsoiling to 8.3 bushels on early fall plowing. 
Table 3. — Yields of winter wheat grown by different methods at the Archer Field 
Station from 1914 to 1923, inclusive 
[Includes reseedings to spring wheat] 
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 
Late fall plowed: 
1 
1 
1 
1 
2 
3 
3.9 
4.9 
5.7 
4.0 
25.9 
24.7 
24.2 
21.2 
4.3 
7.4 
2.4 
5.4 
13.8 
14.7 
13.6 
13.7 
10.0 
12.6 
18.0 
17.0 
2.8 
2.3 
2.0 
1.9 
22.5 
17.1 
1.0 
1.4 
1.9 
1.9 

1.7 
4.5 
5.0 
4.3 
7.7 
6.9 
3.1 
10.7 
12.1 
9.3 
10.9 
10.8 
24.7 
24.3 
17.5 
0.4 
1.5 
2.7 
5.0 

.8 
3.1 
2.0 
7.0 
9.3 
7.8 
8.3 
9.5 
14.2 
11.7 
9.2 
7.4 
Early fall plowed: 
Winter wheat 
8.3 
Subsoiled: Winter wheat.. . 
Listed: Winter wheat 
Stubbled: Oats 
7.4 
8.0 
Disked: Corn 
4.8 
27.1 
25.3 
29.7 
4.2 
4.3 
7.5 
11.0 
Green manured: 
With rye.. 
1 
1 
4.8 
6.1 
9.0 
28.5 
1.9 
.8 
4.0 
3.5 
10.6 
With peas 
12.2 
Total or average 
2 
5.5 
27.5 
5.9 
17.5 
18.8 
1.4 
3.8 
20.9 
2.6 
10.5 
11.4 
Fallowed 
3 
7.7 
26.4 
6.2 
15.6 
20.3 
1.8 
4.0 
24.3 
5.4 
9.2 
12.1 
A verage of all 14 plats ! 

5.6 
26.0 
5.2 
14.0 
14.5 
1.4 
4.6 
18.1 
2.4 
10.2 
10.2 
Number not complete until 1917. 
