THE PRINCIPLES OF INTERGULTURE 213 



tion of ear decreases. In general, the best rate, yield 

 and quality both considered, is about one-fourth to one- 

 third thiclcer than would be necessary to secure maximum 

 yield of grain under the same conditions. 



Drills are best where the corn is planted somewhat 

 thickly, as for silage. Even where hill planting has been 

 found best for grain growing, drill planting has usually 

 given slightly larger yields of stover. The difference, 

 however, is too small to be of much importance, and the 

 method to be adopted is to be determined by convenience 

 in tillage and harvesting. Where harvesting is by ma- 

 chinery, drill planting is most convenient ; but where 

 harvesting is by hand, hills are preferred. 



