60 



The Bulletin, 



Chart 3. 



inFLUEHCE OF 5Y5TEM5 OF 

 FARMING on COrni YIELDS) 



CORN 

 189 5 



7^\GGO 3.1 % 



■ 



Corn Yields. 



50 



CORN 



I89G 

 CORM in 

 Rotdiion 



ons 



,ain /^.fconSk 



44- 



CQRli in ROTATIOn 



Corn lodt priarce soil m Illinois 



VIELD3 



At Beginrnng. 

 AFTER 



€> Nfears Corn 



7 NfeorS ROTATIOIS 

 Corn OOJfo, O/oVar- 



©Years Oori-i 



300f~artihx.a.r^6.00 



C>^feors Corrv 

 7 Years CORN <§. 



FERTILIZER *>V£50 



70 bu 



35bu 



G9bu 

 I 94 by 



Chart 4. 



