ECONOMIC PLANTS 



195 



four grains in a hill four feet each way has not been 

 materially changed by modern methods. Three or 



FIG. 99. Check Row Corn Planter. 



four kernels in hills 3 feet apart is now the general 

 rule. This permits easy cultivation of the field both 

 ways. Another method is to plant in drills. Good 



FIG. 100. Root Distribution at Silking Time. 



Agriculture.) 



(Yearbook U. S. Department of 



