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U.S. Forest Service
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United States Department of Agriculture


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https://www.fs.usda.gov/treesearch/content/pdf?name=Shoot%20water%20relations%20of%20mature%20black%20spruce%20families%20displaying%20a%20genotype%20%C3%97%20environment%20interaction%20in%20growth%20rate.%20III.%20Diurnal%20patterns%20as%20influenced%20by%20vapor%20pressure%20deficit%20and%20internal%20water%20status