Sept. 9,1918 Deep Tilling and Dynamiting in the Great Plains 
513 
June, July, and August. The wheat reached a height of only about 10 
inches and probably would not have yielded as much as 1 bushel per acre. 
It was clipped with a mower and raked off the ground, no attempt being 
made to obtain yields. No appreciable difference could be observed 
between the plots as a result of the dynamiting. The com crop suffered 
badly from drouth and did not ear. It was severely damaged by hail, 
and the yields were not determined. No appreciable difference could be 
observed between any of the plots. 
In 1914 a very promising crop of wheat was destroyed on June 24 by a 
heavy hailstorm. The corn suffered from this storm, and again from a 
second one on July 7. Hail in August again damaged it to a limited 
extent. During the latter part of the season it suffered from lack of 
water and was cut for fodder on August 18. No ears were produced. 
Both 1915 and 1916 were productive of good crops of both wheat and 
com. 
Table XVII gives the yields from this experiment. They are arranged 
and averaged the same as the data in Table XVI, which reports the 
results of the deep-tillage experiment at Akron. 
Table XVII. — Yields at Ardmore ( S . Dak.) Field Station of wheat and corn in dynamit¬ 
ing experiment for the years 1914 to 1916 , inclusive 
Previous 
crop. 
Plot.® 
Wheat.. 
It 
...do.... 
J-M 
...do- 
M-J 
... do.... 
K 
Com.... 
D-N 
.,.do_ 
B-O 
...do_ 
C-P 
...do.... 
A-Q 
Com_ 
F 
.. .do.... 
H-E 
...do_ 
E-H 
.. .do.... 
G 
. Wheat.. 
N-D 
, .. .do.... 
P-C 
, ...do_ 
OB 
&-A 
Crop and treatment. 
WHEAT. 
Dynamite each year. 
First crop after dynamite.... 
Second crop after dynamite. 
Ordinary plowing. 
Dynamite each year. 
First crop after dynamite. 
Second crop after dynamite. 
Ordinary plowing. 
CORN. 
Dynamite each year. 
First crop after dynamite. 
Second crop after dynamite... 
Ordinary plowing.. 
Dynamite each year.... 
First crop after dynamite-- 
Second crop after dynamite... 
Ordinary plowing... 
Yield (bushels per acre). 
1914 
*915 
632 
7x6 
634 
824 
860 
672 
I, 168 
I, 180 
26. 9 
35-3 
35-7 
3i- 5 
25*7 
26.8 
39-8 
26. 4 
17.4 
40.4 
29.4 
33-9 
24. 1 
35*3 
28. 1 
40.6 
1916 
15*9 
11. 7 
18.7 
16. 1 
15*3 
14. 7 
19. o 
18. o 
14. 7 
15*6 
14-3 
22. 3 
18. 2 
13*3 
18.2 
20. o 
Aver¬ 
age. 
21. 4 
2 3 * 5 
27. 2 
23. 8 
20. 5 
20. 8 
29.4 
22. 2 
16. 1 
28. o 
21. 9 
28. z 
21. 2 
24*3 
23.2 
30-3 
Aver¬ 
age of 
similar 
treat¬ 
ment 
after 
both 
wheat 
and 
com. 
21. o 
22. 2 
28. 3 
23. O 
is. 7 
26. 2 
22 . 6 
29. 2 
a Where two plots appear under the same heading* the crop is on the first one in the odd years and on 
the second in the even years. 
& Weight of fodder; no grain produced. 
