TILLAGE AND ROTATION EXPERIMENTS, NORTH DAKOTA 11 
of silage per acre. Although only a single plat of corn was grown on 
fallow, the result agrees with those of other stations in that the 
yield of corn stover or fodder with fallow is below that with other 
methods. 
At Williston the contrasts in yields following the use of the two 
methods are about equ^l to those shown at Hettinger, with possibly 
a greater response to fallow. Wheat averaged 18 bushels on fallow 
and 14 bushels on grain stubble. Five plats were groAvn on grain 
stubble and three on fallow. Oats averaged 40 bushels on three 
fallow plats and 28.1 bushels on eight grain-stubble plats. Barley 
averaged 28.7 bushels on a single fallow plat and 13.7 bushels on 
grain stubble. Two of the three plats following grain were in 
the continuous-cropping series. A single plat on spring-plowed oats 
in rotation No. 7 averaged 15.3 bushels. 
Corn shows a greater response to fallow at Williston than it does 
at Dickinson. During the 11 years of the experiments the average 
on fallow was 18.9 bushels and on grain stubble only 13.1 bushels. 
RESULTS ON DISKED AND ON PLOWED CORN GROUND COMPARED 
Corn ground usually was disked in -preparation for small grains 
at each of the stations. At Dickinson corn ground was plowed in 
the spring in rotation No. 2, and the succeeding yield of wheat was 
20.9 bushels; in rotations Nos. 3 and 62 it was fall plowed, and the 
average yields were 18.8 and 18.1 bushels, or an average of 19.3 
bushels for the three plowed plats. All plats on disked corn ground 
averaged 19.7 bushels. A decrease in yield resulted from plowing 
corn ground. 
At Williston wheat on single plats of spring-plowed and fall- 
plowed corn ground averaged 14.6 and 13.3 bushels, while seven 
plats on disked corn ground averaged 14.4 bushels. Two plats of 
oats on spring-plowed corn ground averaged 32.3 bushels, and four 
disked plats averaged 33.4 bushels. At both Dickinson and Williston 
a slight decrease resulted when small grains were grown on plowed 
rather than disked corn ground. Since disking is the cheaper method 
of preparation it is the one generally used. In this bulletin the 
results on disked corn ground are used in comparing corn ground 
with other preparations. 
RESULTS ON FALLOW COMPARED WITH THOSE ON DISKED CORN GROUND 
When the yields on disked corn ground and on fallow are com- 
pared they usually are favorable to fallow, but by a margin so small 
that when the whole farm scheme is considered the use of corn ground 
seems the more desirable. 
At Dickinson the average yields of all plats with each method were : 
Wheat on fallow 21.5 bushels and on disked corn ground 19.7 
bushels; oats on fallow 45.5 bushels and on disked corn ground 39.8 
bushels: and barley on fallow 26.6 bushels and on disked corn ground 
27.6 bushels. Wheat and oats are each on fallow and on disked corn 
ground in the two rotations. No. 18 (fallow, wheat, corn, and oats) 
and No. 19 (fallow, oats. corn, and wheat). The average yields of 
wheat in these rotations were 22.2 and 20.3 bushels, only 1.9 bushels 
greater on fallow. Oats averaged 46.8 bushels in rotation No. 19 
and 42.8 bushels in rotation No. 18, or 4 bushels more on the fallow. 
