90 



Totals of above crops 1,062,518 acres 



Total of cultivated land 2,296,263 acres 



Total area 3,284,480 acres 



Eatio of acreage of each crop to total acreages of all above crops: wheat, 31 



percent; oats, 7.3 percent; corn, 26.7 percent; forage, 34.9 percent. 

 Eatio of area in above crops to total area of cultivated land, 52 percent. 

 Eatio of cultivated land to total area, 70 percent. 

 Eatio of area of each crop to total area: wheat, 10 percent; oats, 2.4 percent; corn, 



8.6 percent; forage, 11.3 percent; total, 32.3 percent. 



Crop Areas, 1910, Uninfested Counties 



Counties 



Wheat 



Oats 



Corn Forage 



Clay 



Effingham. . 

 Franklin . 

 Hamilton . 

 Jasper . . . 

 Jefferson . 

 Eiehland . 

 Wayne . . . 

 Williamson 



4,170 



35,964 



1,297 



400 



243 



4,624 



1,092 



752 



13,586 



9,056 



33,260 



32,952 



45,417 



44,888 



82,915 



13,829 



31,840 



31,973 



10,911 



44,975 



32,482 



1,129 



18,995 



11,293 



9,887 



24,483 



51,777 



8,771 



20,743 



49,251 



1,217 



42,489 



61,857 



5,705 



36,649 



33,178 



Totals 



62,128 105,922 298,322 | 387,678 



Total of above crops 854,050 acres 



Total of cultivated land 2,033,114 acres 



Total area 2,759,680 acres 



Eatio of acreage of each crop to total acreage of all above crops: — wheat, 7.3 



percent; oats, 12.4 percent; corn, 35 percent; forage, 45.3 percent. 

 Eatio of area in above crops to total area of cultivated land, 42 percent. 

 Eatio of cultivated land to total area, 73.7 percent. 

 Eatio of area of each crop to total area: wheat, 2.2 percent; oats, 3.8 percent; 



corn, 10.8 percent; forage, 14 percent; total, 30.8 percent. 



As another method of ascertaining" the effect of the kind of crop- 

 ping upon the extension, of chinch-bug injury, I have brought into 

 comparison the crop areas in 1911 of four counties adjacent to the in- 

 fested area which were not themselves infested in this year but were 

 invaded by the chinch-bug in the year following, and those of four 

 other counties adjacent which were not infested in either year. 

 (Map 2.) For convenience of discussion, I will call the four counties 

 not subsequently infested (Clay, Franklin, Jackson, and Jefferson) 

 Group A, and the four subsequently infested counties (Jersey, 

 Macoupin, Madison, and Montgomery) Group B. The following table 

 is the basis of my comparison. 



Crop Areas, 1911 



Counties, Group A (not infested) 



Clay.... 

 Franklin 

 Jackson. 

 Jefferson 



Totals. 



Wheat 



4,587 



1,128 



20,794 



5,872 



Oats 



Corn 



7,879 



13,414 



750 



9,096 



29,934 

 30,248 

 13,321 

 21,300 



32,381 



31,139 



94,803 



Forage 

 31,810 

 31,565 

 15,722 

 50,346 



129,443 



