DEPTH OP ROOT SYSTEMS 



87 



On deeper and somewhat drier soils, corn roots 

 went down as far as eight feet. The roots of the 



Flu. 24. Sugar-beet roots. 



small grains, — wheat, oats, barley, — penetrated 

 the soil from four to eight or ten feet. Vari- 

 ous perennial grasses rooted to a dejjth of four feet 

 the first year; the next year, five and one half feet; 



