University of Arizona 



Agricultural Experiment Station 



Bulletin No. 78 



Vv.-- 

 BOT> 



A Weather Bureau Shelter, with native forms of vegetation adapted to the region — ^cacti, 

 desert grasses and Farkinsonia trees in the background. 



Relation of Weather to Crops 



AND 



Varieties Adapted to Arizona 

 Conditions 



By Alfred J. McClatchie, J. Eliot Coit 

 and the Station Staff 



Tucson, Arizona, October 20, 1916 



