LIFE HISTORY OF LODGEPOLE PINE IN EOCKY MOUNTAINS. 35 



If areas logged without thought for the future show such results, 

 it is reasonable to suppose that thinnings made with the object of 

 improving the stand will result even more satisfactorily, for the trees 

 left will be thrifty-crowned specimens of moderate size, which are 

 best able to take advantage of the increased light. Next to the exclu- 

 sion of fire, the most important respect in which systematic manage- 

 ment will improve the growth and yield of lodgepole forests is in 

 bringing the stands to a density more nearly normal. 



ADDITIONAL COPIES 



OF THIS PUBLICATION MAT BE PROCURED FROM 



THE SUPERINTENDENT OF DOCUMENTS 



GOVERNMENT PRINTING OFFICE 



"WASHINGTON, D. C. 



AT 



10 CENTS PER COPY 



V 



WASHINGTON : GOVERNMENT PRINTING OFFICE '. 1914 



