34 DRY-FARMING 



per cent more receives from 20 to 30 inches under 

 conditions that make dry-farming methods necessary. 

 A total of about 65 per cent of the earth's land sur- 

 face is, therefore, directly interested in dry-farming. 

 With the future perfected development of irrigation 

 systems and practices, not more than 10 per cent 

 will be reclaimed by irrigation. Dry-farming is 

 truly a problem to challenge the attention of the 

 race. 



