A HANDBOOK FOR EUCALYPTUS PLANTERS. 



35 



the region has thus become, largely through their agency, an important 

 center of sugar-beet production. 



PLATE 6. Avenue planted with blue gum trees in San Bernardino Valley. Trees 

 serve as windbreaks for citrus orchards. They are 12 to 20 inches in 

 diameter and 125 feet high at 12 to 15 years of age. 



Along the coast the planting of shelter belts for the protection of 

 towns has been practiced to some extent, to the greater comfort of the 



