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Photograph of Thinning in Black Spruce Swamp
Summary
Original caption: Thinning in black spruce swamp 60-70 years of age in national forest timber sale cut Nov. 1939. About 1/3 of total stems removed. Borings in summer or 1941 showed increased growth.
Historic Photographs
Tags
Date
01/09/1941
Location
Ottawa National Forest (Mich.)
Source
The U.S. National Archives
Copyright info
No known copyright restrictions
