Sept. 9.1918 Deep Tilling and Dynamiting in the Great Plains 
515 
In 1915 all the plots were given the same treatment and seeded to 
wheat, for which the season proved extraordinarily favorable. The 
plots were all fallowed in 1916 and seeded to alfalfa in 1917. The yields 
for the three years following the dynamiting are shown in Table XVIII. 
Table XVIII.— Yields at Beliefourche (S. Dak.) Field Station of oats and wheat in 
dynamiting experiment for the years 1913, 1914, and 1913 
Plot No. 
Treatment. 
Yield in bushels each year. 
1913, oats. 
19x4. oats. 
1915, wheat. 
B VII-I. 
Fall-plowed. 
25-9 
18.4 
24.1 
19. I 
18.8 
16. I 
58.8 
54 -O 
52.8 
B VIII-i. 
B IX-i. 
Fall-plowed and dynamited... 
Fall-plowed and manured. 
The only conclusion that can be drawn from these yields is that dyna¬ 
miting is not effective in increasing yields. The first year after dyna¬ 
miting the effect appears to have been quite the opposite. It is im¬ 
possible to say how much effect the manure used on Plot IX-i had in 
overcoming the initially poor condition of that plot. 
JUDITH BASIN FIEUD STATION 
DEEP TILLAGE BY THE USE OF DYNAMITE 
An experiment similar to those at Akron and Ardmore, in the use of 
dynamite as a medium of deep tillage was inaugurated in the fall of 1912 
at the Judith Basin Field Station. The plots are % acre in size. The 
plan of the experiment is identical with that at Ardmore, as shown in 
figure 4 and described in connection with the results from that station. 
The' land on which this experiment was started was prairie sod broken 
in June, 1909, and seeded to winter wheat late in November of that year. 
A poor crop of wheat was harvested from the land in 1910, the yield 
being 10 bushels per acre. The land was plowed in the spring of 1911 
and seeded to flax, which yielded 12 bushels per acre. The Judith Basin 
Field Station obtained possession of this tract of land in November, 1911. 
The field was bare -fallowed during 1912, being plowed late in June, and 
double-disked and harrowed three times during the remainder of the 
season. The plots were staked out, and the first dynamiting was done 
in September of that year. The entire block of 16 plots was plowed in 
the spring of 1913 and seeded to wheat and corn, as called for in the out¬ 
line of the experiment. Very little difference could he noted in the growth 
of grain on the different plots during the season. At harvest time the 
plots were as uniform in growth and height as if they had all received the 
same treatment. 
In preparation for the crop of 1914 dynamiting was done in the fall, 
but all plowing was deferred until spring. Good stands were obtained 
with both wheat and com and good crops produced. 
