6 DRY-FARMING 
The problems of dry-farming 
The dry-farmer, at the outset, should know with 
comparative accuracy the annual rainfall over the 
area that he intends to cultivate. He must also 
Fie. 3. Liey-arm cane in New Mexico. Note native vegetation in 
‘ foreground. 
have a good acquaintance with the nature of the 
soil, not only as regards its plant-food content, but 
