344 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



in various parts of the state by the University, and on many- 

 farms operated or directed by their owners, are still more en- 

 couraging; for they show that the average yields of both wheat 

 and corn can be doubled by the more extended use of the Illinois 

 system of permanent fertility. 



Thus, as a ten-year average, 1905 to 19 14, the acre-yield of 

 corn was 77.1 bushels in the grain system and 79.5 in the live- 

 stock system on the University North Farm ; while on the South 

 Farm, where wheat was included in the rotation, the average 

 yields for the same ten years were 68.1 bushels of corn and 37 

 of wheat in the grain system, and 67.3 of corn and 37.7 of wheat 

 in the live-stock system. Only limestone, phosphorus, and or- 

 ganic matter produced on the farm are used in these systems. 

 (For many years previous to 1903 the South Farm was under 

 tenant husbandry, and it was producing only about 40 bushels of 

 corn and 20 of wheat when these methods were adopted.) For 

 more complete details of Illinois methods and results, the reader 

 is referred to Circulars 167 and 181 of the Illinois Experiment 

 Station, Urbana, Illinois. 



