Vacuum Pumps' Relationship to Sap Yield

Harler, Curt
January 2016
Farming;Jan2016, p18
The article presents views of Timothy Wilmot, retired maple specialist at the University of Vermont, on the importance of vacuum for sap yield. According to a research conducted by the Proctor Maple Research Center of University of Vermont, sap grows by four to six percent from the one inch of vacuum produced.


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