82 INDIAN CORN CULTURE. 
yield.* Of seven comparisons all but one were 
very much adverse to pruning. 
At the Minnesota station Prof. W. M. Hays 
found; that the root-pruned plats averaged 
nearly three bushels of corn and 800 Ibs. of 
fodder less per acre than the plats not root- 
pruned. Another year root-pruning was found 
to diminish the yield of grain 134 bushels per 
acre, 
A number of years of comparison of root- 
pruned with unpruned corn at the Illinois sta- 
‘tion, by Prof. G. E. Morrow, has shown a gen- 
eral injury from the root-pruning.{ In 1893 
the yield per acre was 100.3 bu. for the un- 
pruned as against 78.8 bu. for the pruned—a 
very material difference. 
The above results show the necessity for 
shallow cultivation and the injurious results of 
breaking off the surface corn roots. Set the 
cultivator so that the teeth will run shallow. 
The weeds may be easily destroyed by cultivat- 
ing at a depth of about an inch if the work is 
done in reasonable season. 
* New York agricultural experiment station. Report for 
1883, p. 134. 
{ Bulletins Nos. 6 and 11, Minnesota agricultural experi- 
ment station. 
1 Bulletin No. 31, March, 1894, Illinois agricultural exper- 
iment station, p. 357. 
