UNITED STATCS DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 1291 
Washington, D. C. T February 20, 1925 
L 
ASPEN IN THE CENTRAL ROCKY MOUNTAIN REGION 
By 
FREDERICK S. BAKER, Forest Examiner, Forest Service 
CONTENTS 
P.g. 
Introduction 1 
Distribution 2 
The Tree * . . . ~. . . S 
Climatic Requirements 7 
Soil and Moisture Requirements 12 
Tolerance 14 
Susceptibility to Injurious Factors .14 
Reproduction 20 
The Stand 24 
Growth •_ 2S 
Yield 28 
Properties of the Wood 33 
Uses 33 
Lumbering and Logging .34 
Management of Aspen, Silvicultural Systems 35 
Appendix 42 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1925 
