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Side of basin denuded by prairie dogs - 

 devastation being rapidly completed by erosion. 

 Coohetopa Forest, Colorado. 



Prairie dogs prepare an ideal 

 oondition for the start of sheet 

 erosion on hillsides by denudation 

 of vegetative cover. Note lack of 

 vegetation. Erosion onoe started 

 is accelerated by other faotors as 

 shown on page 11. 



&3 



-10~ 



