Author: Perkins, Timothy D.

Showing 31 – 40 of 124 resources

Effects of Tapping Depth on Sap Volume, Sap Sugar Content, and Syrup Yield Under High Vacuum

Tapping depth strongly influences both sap yield and wounding. Numerous studies have focused on the amount of sap produced with ifferent depths, the most extensive work conducted by Morrow (1963), who found a tendency for increasing sap yields with increasing taphole depth. However, this work was conducted on gravity with 7/16” tapholes, so is less informative to most producers using 5/16” spouts and vacuum.

Publication:
Maple Syrup Digest
Date:
March 1, 2021

Proctor Maple Research Center Update 

Dr. Tim Perkins, Director of UVM’s Proctor Maple Research Center, shares a review of the past year at PMRC and a collection of recent findings on topics related to sap and syrup production.

Date:
December 7, 2020

Some quick tips to achieve higher sap yield

Increasing the yield of sap from maple trees is the goal of most maple producers. While getting there isn’t a matter of one simple thing, by
following best management practices and paying attention to detail it is possible to increase sap yields, often quite dramatically. Includes links to videos.

Publication:
Maple News
Date:
October 3, 2020

Some quick tips to achieve higher sap yield

Increasing the yield of sap from maple trees is the goal of most maple producers. While getting there isnÕt a matter of one simple thing, by following best management practices and paying attention to detail it is possible to increase sap yields, often quite dramatically.

Publication:
Maple News
Date:
August 3, 2020

Darkening of Maple Syrup in Uncoated and XL-Coated Plastic Containers

Although several previous studies have examined syrup darkening in different retail containers, packers and producers sometimes question the effectiveness of an oxygen-barrier in reducing the rate of color change. Two studies were performed by the University of Vermont (UVM) Proctor Maple Research Center (PMRC) in 2018 and 2019 to compare the rate of color (LT) change in maple syrup in uncoated and XL-coated retail plastic containers.

Publication:
Maple Syrup Digest
Date:
June 1, 2020

Tapholes: Straight or Slanted?

Is there any difference in sap yield when tapping at a slight angle (the historical recommendation) or tapping straight in (the current recommendation)? While there might be other considerations suggesting that tapping straight in is advantageous, from a syrup yield perspective, there is no apparent difference.

Date:
April 23, 2020