PRODUCTION OF CORN IN THE UNITED STATES 63 



very direct connection between rainfall and yield of corn. 

 The yield does not depend upon the total rainfall alone, 

 but upon its distribution throughout the growing season. 



Fig. 23. — Distribution of the World's Corn Crop. United States Pro- 

 duces Four-fifths and the Rest of the World One-fifth of the Total 

 Crop. 



The most favorable condition for the growth of corn is 

 heavy rains at considerable intervals, with clear weather 

 and abundant sunshine in the meantime. 



