WOODY PLANTS FOR DRY-FARMING 251 
Shaw suggests that sanfoin, long famous for its service 
to European agriculture, may be found to be a prof- 
itable dry-farm crop, and that sand vetch promises 
to become an excellent dry-farm crop. It is very 
likely, however, that many of the leguminous crops 
which have been developed under conditions of abun- 
dant rainfall will be valueless on dry-farm lands. 
Every year will furnish new and more complete in- 
formation on this subject. Leguminous plants will 
surely become important members of the association 
of dry-farm crops. 
Trees and shrubs 
So far, trees cannot be said to be dry-farm crops, 
though facts are on record that indicate that by the 
application of correct dry-farm principles trees may 
be made to grow and yield profitably on dry-farm 
lands. Of course, it is a well-known fact that native 
trees of various kinds are occasionally found growing 
on the deserts, where the rainfall is very light and the 
soil has been given no care. Examples of such vege- 
tation are the native cedars found throughout the 
Great Basin region and the mesquite tree in Arizona 
and the Southwest. Few farmers in the arid region 
have as yet undertaken tree culture without the aid 
of irrigation. 
At least one peach orchard is known in Utah which 
grows under a rainfall of about fifteen inches without 
