Showing 81 – 90 of 121 resources

The 3/16 phenomenon

Using smaller-diameter tubing can create a natural vacuum which can increase sap production. This article details some research into this method of sap collection, and offers tips on some practical applications.

A Mathematical Model for Maple Sap Exudation

Sap exudation refers to the process whereby sugar maple trees (Acer saccharum) are capable of generating significant stem pressure in a leafless state, something that occurs to a lesser extent in only a few other related species such as birch and walnut. This exudation pressure is what causes maple sap to flow from a taphole in sufficient quantities to be harvested and processed into syrup. Exudation has been studied for well over 100 years and has been the subject of many scientific studies, but there is as yet no definitive explanation for how such large pressures can be generated in the absence of transpiration (i.e., when no photosynthesis occurs to drive the flow of sap).

Does sugar removal impact trees? A complex question to answer.

Two main issues relate to the sustainability of maple sugaring; tree wounding and sugar removal. In other words, does a tapped maple tree grow more wood than is compartmentalized (functionally “removed by the tree’s normal wound response process) each year and/or does sap collection take more sugar from the tree than can be readily replaced through photosynthesis? These two issues, although separate in some respects, are inextricably intertwined.

Sap Now or Sawlogs Later

Tapping trees has an impact on the value of those trees’ logs for lumber.

A New Take on Sap Collection

A new method of gathering sap from sugar maple saplings is being tested.

How Many Taps?

Tapping guidelines written by state regulators haven’t always kept pace with changes in industry practices or understanding of the science of sap flow, and researchers are working to update tapping guidelines.