48 CHAPARRAL. 
Perhaps 1,000,000 acres of the chaparral area would support a 
growth of the more desirable species of eucalypts, and on an addi- 
tional 1,000,000 acres certain more hardy but less commercially 
valuable species could be grown. Before any attempt is made to 
introduce eucalypts into the chaparral on a large scale, however, 
much more must be known about the habits and requirements of the 
different species than is known now. It must be known, for example, 
whether desirable species will grow on the dry, rocky, and inhos- 
pitable slopes where even the chaparral can barely maintain an exist- 
ence. It is not enough to know that certain desirable species of 
eucalypts can be grown in favorable locations in southern California. 
What must be found are species adapted to each slope, altitude, and 
climate. The magnitude of the task, too, compels caution. To intro- 
duce eucalypts or other trees over an area of 1,000,000 or 2,000,000 
acres will entail an expense which would never be justifiable, unless 
it is practically certain that the work will meet with success. 
O 
