Comparison of vacuum and gravity sap flows from paired sugar maple trees

H. Clay Smith; Carter B. Gibbs

Treesearch

Comparison of vacuum and gravity sap flows from paired sugar maple trees

Informally Refereed

Authors:

H. Clay Smith, Carter B. Gibbs

Year:

1970

Type:

Research Note

Station:

Northern Research Station

Source:

Research Note NE-122. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4p.

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Download (PDF 209 KB): https://research.fs.usda.gov/download/treesearch/19781.pdf

Abstract

Paired sugar maple trees with single tapholes were used to compare sap yields from vacuum-pumping with sap yields from gravity flow. Results indicated that vacuum yields were approximately twice as great as gravity flows. These results support previous findings from studies in which vacuum and gravity were compared with two tapholes on the same tree.

Citation

Smith, H. Clay; Gibbs, Carter B. 1970. Comparison of vacuum and gravity sap flows from paired sugar maple trees. Research Note NE-122. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4p.