Normal sap flow in a 3/16" natural vacuum maple tubing system
https://www.youtube.com/watch?v=a4vShZBWWVA
Normal sap flow in a 3/16" natural vacuum maple tubing system
https://www.youtube.com/watch?v=a4vShZBWWVA
Dr. Tim Perkins
UVM Proctor Maple Research Ctr
http://www.uvm.edu/~pmrc
https://mapleresearch.org
Timothy.Perkins@uvm.edu