PAPERS OX BIOLOGY AND AGRICULTURE 245 



bution of these fields that this figure is fairly represen- 

 tative of what might be accomplished under average 

 farm conditions throughout the state. As an average of 

 the past eight years the state has grown annually ap- 

 proximately 9,500,000 acres of corn, and on the basis 

 of the 11.3 bushel increase this would add over 107,350,000 

 bushels of corn to the total annual production of the 

 state. This increase would amount to almost 1 3 of the 

 present annual corn production of the state, and would 

 add much to the agricultural wealth of Illinois for the 

 com crop alone. The experimental evidence obtained 

 shows that not only is the corn yield increased by the ad- 

 dition of legume nitrogen, but the yields of wheat, oats, 

 clovers and other crops have been increased materially 

 by the lime-sweet clover treatment. 



These experimental results show that our agricultural 

 production may be increased greatly by the proper utili- 

 zation of the common legume crops which may be grown 

 successfully on every Illinois farm. This also indicates 

 that science has made much advancement toward the 

 solution of practical soil problems. 



