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U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture


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https://www.fs.usda.gov/treesearch/search?keywords=%22calcium%22&%3Bf%5B0%5D=author_facet%3A%22Perry%2C%20Charles%20H.%20%28Hobie%29%22&f%5B0%5D=year%3A%221975%22