PRODUCTION OF CORN 75 



Kinds of corn. For the general corn crop, except in the 

 most northern parts of states lying on the Canadian border, 

 dent corn is almost universally used because of its high yield. 

 There are several varieties of dent corn, each having been 

 developed to meet the conditions of a particular region. For 

 example, the region of dent-corn production has been ex- 

 tended northward, by the development of varieties capable 



Distribution map of corn. Note position of the Corn Belt, perhaps the 

 most favorable area in the world for corn. (U.S. Dept. of Agriculture.) 



of maturing during the short growing period of those regions. 

 In other places, as in the southern part of the Corn Belt, 

 varieties have been developed to take the greatest advantage 

 of a rather long growing season, thereby adding to the yield 

 per acre. Some well-known varieties of dent corn are the 

 Johnson County White, Boone County White, Reid's Yellow 

 Dent, Learning, Wisconsin number 7, and Silver King. 

 Only those varieties should be grown which experience 



