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Vacuum pumping increases sap yields from sugar maple treesAuthor(s): Barton M. Blum; Melvin R. Koelling
Source: Res. Pap. NE-106. Upper Darby, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 14 p.
Publication Series: Research Paper (RP)
Station: Northeastern Research Station
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CitationBlum, Barton M.; Koelling, Melvin R. 1968. Vacuum pumping increases sap yields from sugar maple trees. Res. Pap. NE-106. Upper Darby, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 14 p.
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