LIFE HISTORY OF LODGEPOLE PINE IN ROCKY 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. 
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