THE CORN CROP IN THE UNITED STATES. 



119 



A full stand of corn has a total leaf area equal to twice 

 the area of the land on which the corn is growing. The daily 

 water loss per plant through transpiration and evaporation may 

 vary from 3 to 10 pounds daily, depending on humidity, and on 

 the wind, hence corn must have plenty of water to yield a good. 

 crop. 



Range of Temperature and Rainfall in Some Prominent Com 

 Growing States, Average of Fifteen Years' Record. 



AVERAGE MONTHLY TEMPERATURE, DEGREES FAHRENHEIT. 



AVERAGE MONTHLY RAINFALL INCHES. 



