Sugar maple sap volume increases as vacuum level is increased

Russell S. Walters; H. Clay Smith

Treesearch

Sugar maple sap volume increases as vacuum level is increased

Informally Refereed

Authors:

Russell S. Walters, H. Clay Smith

Year:

1975

Type:

Research Note

Station:

Northern Research Station

Source:

Research Note NE-213. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4p.

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Download (PDF 413 KB): https://research.fs.usda.gov/download/treesearch/19303.pdf

Abstract

Maple sap yields collected by using plastic tubing with a vacuum pump increased as the vacuum level was increased. Sap volumes collected at the 10- and 15-inch mercury vacuum levels were statistically significantly higher than volumes collected at the 5-inch level. Although the 15-inch vacuum yielded more sap than the 10-inch vacuum, the difference was not statistically significant. An efficient vacuum system should have a vacuum level of at least 10 inches of mercury at the taphole.

Citation

Walters, Russell S.; Smith, H. Clay. 1975. Sugar maple sap volume increases as vacuum level is increased. Research Note NE-213. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4p.