144 



AGRICULTURE 



Place in Rotation. As corn removes humus and nitrogen 

 from the soil, it should follow and precede crops which supply 



x SOIL TOO POOR TO YIELD A PROFITABLE CROP 



one or both of these. Some good farmers sow rye or crimson 



clover in the fall on land to be 

 planted in corn the following 

 spring, and plow under the rye 

 crop or clover stubble. 



Improvement. The average 

 yield of corn in the United 

 States is only twenty-four bush- 

 els to the acre. It is an easy 



yielding forty bushels of grain and 3500 Ibs. of crO p to improve in vield and 

 forage. . . 



m quality. It is estimated that 



the yield to the acre could easily and quickly be doubled with 

 very little increase in work or expense by improving the seed, 



GRAIN 



FORAGE 



This diagram shows the amount of fertility 

 removed from an acre of soil by a.crop of corn 



