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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>
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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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Public domain
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.

8 May 2018

Public domain
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.

English ∙ español ∙ Nederlands ∙ slovenščina ∙ Tiếng Việt ∙ македонски ∙ русский ∙ українська ∙ 日本語 ∙ +/−

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current19:45, 8 May 2018Thumbnail for version as of 19:45, 8 May 20184,305 × 2,718 (1.51 MB)OceanAtoll (talk | contribs)Transferred from Flickr via #flickr2commons

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