SMALL GRAINS ON ARLINGTON EXPERIMENT FARM 
PRECIPITATION 
Data on monthly and annual precipitation by crop years from 
July, 1911, to June ; 1923, inclusive, are shown in Table 1. Data for 
the 12 months from July 1 to June 30 are presented rather than 
those for the calendar year as more nearly approximating the rain- 
fall available to fall-sown crops. Totals for the three months in 
spring and early summer — April, May, and June — when the crops 
make most of their growth, also are given. Weather data were not 
recorded at the Arlington Experiment Farm previous to March, 1912. 
Weather data taken at the main Weather Bureau station at Washing- 
ton, D. C.j for the years previous to this date are available, however. 
Data for the earlier years in which cereal experiments were conducted at 
the farm were reported by Stanton. 5 Rainfall for the 12 months ended 
in June, 1910, was 33.22 inches and for the 12 months ended in June, 
1911, 48.22 inches. In April, May, and June, 1910, the total rainfall 
was 8.27 inches, and in the same months in 1911 it was 11.53 inches. 
The average rainfall shown in Table 1 for the 12-month periods is 
41.39 inches. The crop year of least rainfall was 1917, when 37.45 
inches fell. Actual injury to crops from lack of rainfall during spring 
has never been recorded, but damage due to heavy rains and winds 
is not uncommon. 
Table 1. — Precipitation at the Arlington Experiment Farm for the 12-month 
periods (crop years) from July, 1911, to June, 1923, inclusive, and monthly 
average for each period 
[Data (in inches) from records taken by A. Meyer, except that data previous to March, 1912, are from the 
Weather Bureau station at Washington, D. C] 
Month 
1911 
1912 
1913 
i 
1914 
1915 
1916 1917 1918 
1919 
1920 
1921 
4.96 
1.67 
3.89 
.88 
4.64 
1.50 
1 
1922 
Aver- 
age 
July 
August 
September 
October 
November 
1.36 7.97 
7.11 i 1.62 
2. 26 6. 59 
4.04 ! .92 
3.98 j 1.57 
3.86 i 3.76 
1 
2.17 
i 5.13 
1 2.61 
4.77 
2.72 
2.53 
2.80 
6.47 
.70 
1.71 
2.27 
4.62 
3.34 
8.21 
1.72 
4.18 
1.20 
2.79 
5. 02 7. 75 '■ 3. 98 
2. 10 .77 2. 33 
2. 91 1. 67 ; 3. 15 
1. 69 5. 21 . 94 
2.80 .59 1.55 
2. 34 : 1. 32 4. 44 
7.42 
3.71 
1.68 
3.97 
2.54 
3.27 
4.97 
4.91 
2.85 
.43 
4.14 
3.58 
7.84 
4.09 
7.65 
1.88 
.60 
3.80 
4.97 
4.01 
3.14 
2.55 
2.38 
3.15 
1912 1913 
1914 
1915 
1916 
1917 1918 
1919 
1920 1921 
1922 
1923 
January ... 
2. 24 2. 84 
2.92 1.32 
6. 54 ; 4. 08 
2. 19 1 6. 12 
4. 40 j 4. 91 
3.94 ! 2.44 
4.96 
2.47 
2.01 
3.71 
1.78 
6.69 
6.08 
4.04 
.94 
1.07 
2.66 
6.74 
1.28 
2.81 
2.53 
3.07 
2.59 
8.21 
2. 79 4. 46 
2. 06 . 79 
6. 24 5. 12 
2. 36 6. 74 
2. 21 2. 76 
4. 93 1. 83 
3.83 
2.11 
4.16 
3.53 
6.00 
2.95 
2. 42 2. 94 
3. 07 2. 13 
2. 44 2. 34 
4. 58 3. 72 
1. 60 6. 46 
4.51 3.47 
4.65 
2.54 
4.52 
1.81 
4.53 
4.14 
3.94 
2.42 
4.18 
4.46 
1.49 
3.40 
3.54 
February 
March 
April 
May 
June 
2.39 
3.76 
3.61 
3.45 
4.44 
Total: 
For crop year 
For April, May, 
and June 
44.84 44.14 
10.53 13.47 
41.55 
12.18 
40.10 
10.47 
41.93 
13.87 
37.45 39.01 
9.50 11.33 
38.97 
12.48 
41.21 
10.69 
41.94 
13.65 
39.73 
10.48 
45.75 
9.35 
41.39 
11.50 
RAINFALL AND YIELD OF WINTER WHEAT 
The highest yields of winter wheat were obtained in 1917, when 
the average of all varieties grown continuously from 1912 to 1923, 
inclusive, was 15.5 bushels higher than the average for the same 
varieties in this 12-year period. The poorest wheat year was 1921, 
when the same varieties averaged about 10.8 bushels below the 12- 
5 See footnote 2, on p. 1 . 
