File:1940. Depths and widths of roots of 80-year-old jack pine. Root-washing experiment of the Bureau of Entomology proved damage due to decadence. Chippewa National Forest, Minnesota. (40672037235).jpg
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Depths and widths of roots of 80-year-old jack pine. Root-washing experiment of the Bureau of Entomology proved damage due to decadence. Chippewa National Forest, Minnesota. Photo by: Paul Zehngraff Date: 1940 Credit: National Archives and Records Administration RG# 95-GP.Records of the Forest Service. General Subject Files. USDA Forest Service Negative Number: 399306 NARA image: 95-GP-5967-Box1033_046_001_AC Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: <a href="https://www.fs.usda.gov/main/r6/forest-grasslandhealth" rel="nofollow">www.fs.usda.gov/main/r6/forest-grasslandhealth</a> |
| Date | |
| Source | 1940. Depths and widths of roots of 80-year-old jack pine. Root-washing experiment of the Bureau of Entomology proved damage due to decadence. Chippewa National Forest, Minnesota. |
| Author | R6, State & Private Forestry, Forest Health Protection |
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This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.
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This image was originally posted to Flickr by USDA Forest Service at https://flickr.com/photos/151887236@N05/40672037235 (archive). It was reviewed on 8 May 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
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This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 19:45, 8 May 2018 | | 4,305 × 2,718 (1.51 MB) | OceanAtoll (talk | contribs) | Transferred from Flickr via #flickr2commons |
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