FORTY-FIRST ANNUAL CONVENTION 343 



Bushels per acre of Illinois wheat and corn : 



1st Data from U. S. Department of Agriculture 



Average Wheat Corn 



24 years ( 1866 to 1889) 12.8 28.5 



15 years ( 1890 to 1904) i3-2 32.2 



10 years ( 1905 to 1914) 16.0 34.S 



Total increase 3.2 6.3 



2nd Data from Illinois State Board of Agriculture 

 Average . Wheat Corn 



24 years ( 1866 to 1889) 13.2 29.6 



15 years (1890 to 1904) '. . 13.9 33.5 



10 years (1905 to 1914) 16.4 35.4 



Total increase 3.2 5.8 



According to the statistics of the United States Department 

 of Agriculture, the total average increases in acre-yield for the 

 State of Illinois are 3.2 bushels of wheat and 6.3 of corn, while 

 the comparable averages for Indiana and Ohio are 3.15 bushels 

 of wheat and 5.95 of corn. The latest Yearbook reports the total 

 acreage of corn and wheat as 12,846,000 in Illinois and 13,059,- 

 000 in Indiana and Ohio combined; and the latest United States 

 Census Report shows that the farmers of Indiana and Ohio paid 

 out more than ten times as much money for commercial fertil- 

 izers (chiefly for complete fertilizers) as was invested by lUinois 

 farmers in their fertilizers (chiefly for limestone and phos- 

 phorus). 



These general statistics agree very well with the results of 

 seventy-three "Co-operative Fertilizer Tests on Clay and Loam 

 Soils," extending into thirty-eight counties of Indiana, as re- 

 ported in Bulletin 155 of the Indiana Experiment Station, which 

 show, as an average, that each dollar spent for complete fertil- 

 izer produces $1.13 increase in crop value, of which $1.00 ogee's 

 to the fertilizer interests and 13 cents to the farmer. 



The results thus far secured in Illinois are encouraging, but 

 the actual yields on more than forty experiment fields operated 



