DRY FARMING IN SOUTHEASTERN WYOMING 
Table 1. — Monthly, seasonal, and annual precipitation at the Archer Field Station 
from 1913 to 1923, inclusive, compared with the averages at Cheyenne, Wyo., for 
the same years and for the 53-year period from 1871 to 1923, inclusive, 
[Precipitation in 
inches; T = 
= trace 
. The averages shown at Chevenne, 
Wyo. 
for both the 11-year and 
the 
53-year periods are from the records of the United States Weather Bureau] 
Sea- 
Year 
Jan. 
Feb. 
Mar. 
Apr. 
May 
June July 
Aug. Sept. 
Oct. 
Nov. 
Dec. 
sonal, 
Apr.- 
Sept. 
An- 
nual 
1913 
0.55 
0.74 
0.33 
1.35 
2.25 
1. 51 2. 06 
2.09 
2.23 
0.66 
0.46 
1,65 
11.49 
15.88 
1914 
T 
.60 
.56 
2.54 
1.46 
1.12 
1.43 
2.03 
.32 
1.29 
.26 
.16 
8.90 
11.77 
1915 
.08 
.49 
.71 
4.90 
1.78 
1.83 
1.65 
2.53 
1.95 
1.81 
.03 
.56 
14.64 
18.32 
1916 - 
.10 
.06 
. 09 
.80 
.19 
.85 
.74 
1.87 
1.61 
4.54 
.48 
.46 
1.81 
1.79 
4.05 
1.20 
1.37 
.91 
.73 
.57 
.88 
.40 
.34 
.81 
10.06 
10.77 
12.39 
1917 
14.26 
1918 
.47 
.89 
.19 
4.14 
1.86 
2.78 
2.74 
1.66 
2.41 
1.33 
.54 
.58 
15.59 
19.59 
1919 
T 
.14 
.87 
.58 
.31 
.59 
2.76 
1.19 
3.10 
1.48 
1.26 
1.10 
8.53 
13.38 
1920 
.20 
.69 
.34 
3.88 
2.08 
4.33 
1.21 
1.25 
.88 
.57 
.15 
.27 
13.63 
15.85 
1921 
.95 
.07 
.14 
.86 
2.19 
2.47 
1.79 
.76 .08 
.21 
.08 
.73 
8.15 
10.33 
1922 
.32 
.28 
.20 
2.33 
2.15 
2. 30 1. 81 
2. 36 . 14 
.06 
2.23 
.44 
11.09 
14.62 
1923 
.06 
.42 
1.06 
.86 
2.98 
2.69 
1.38 
4. 59 1. 14 
3.32 
.16 
.09 
13.64 
18.75 
AVERAGES 
11 years, 1913 to 
1923: 
Archer Sta- 
tion 
.25 
.47 
.49 
2.19 
2.11 
1.87 
1.86 
2. 16 1. 32 
1.09 
.59 
.61 
11.51 
15.01 
Cheyenne. .'. 
.39 
.61 
.74 
2.46 
2.32 
1.12 
2.12 
1.67 : 1.52 
1.15 
.68 
.73 
11.21 
15.51 
53 vears, 1871 to 
1923: 
Cheyenne.. . 
.39 
.56 
.93 
1.87 
2.39 
1. 51 2. 04 
1.49 ! 1.18 
.87 
.47 
.47 
10.48 
14.17 
/£>/<* /9/<5~ /£>/£ /P/7? /P/3 /*/& /&2& /Pe/ /&2Q /&S& 
Fig. 1. — Seasonal precipitation (inches), yield of spring wheat (bushels per acre) on disked corn ground, 
and yield of corn (bushels per acre) on spring-plowed wheat stubble at the Arcber Field Station for 
each of the years from 1914 to 1923, inclusive. The yield of wheat in 1920 is from the varietal tests. 
The other yields are from the crop-rotation experiments and are given in Tables 2 and 7 
About three-fourths of the aYerage annual precipitation occurs 
during the 6-months growing season from April to September, in- 
clusive. This is a small quantity, but if distributed as best fits the 
needs of the growing crops it is sufficient. The feature of timeliness 
of the precipitation is often of greater importance than the quantity. 
The seasonal precipitation for each of the 10 years from 1914 to 1923, 
inclusive, is shown in Figure 1. The average annual yields of spring 
