Sap flow and stem pressure in sugar maples during winter dormancy depend on the expansion and contraction of gas bubbles. These gas bubbles are primarily located in the libriform fibers of wood tissues, not in the xylem vessels. Though there are gas bubbles (embolisms) in the xylem vessels, these bubbles are not the dominant drivers of stem pressurization.
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Some maple operations will have compliance requirements under the Preventive Controls for Human Food Rule of the Food Safety Modernization Act or FSMA. Determining where or if your operation falls under this rule is complicated, so our UNH Extension FSMA team has created an online tool that asks you a series of questions and based on your answers tells you where you most likely fall under the rule.
Tips on tree identification, tapping, sap collection, boiling, and more.
Tips for designing tubing systems and tapping
Maple Watch is studying sap to investigate environmental impacts of climate change on sugar maples.
Slides from a presentation on how sugar maples adapt to drought and other effects of climate change.
Regardless of the availability and guidance provided, maple producers should clearly understand that the use of isopropyl alcohol in maple tubing systems anywhere in the United States is a violation of federal law.
In October, in Green Bay, an informal needs assessment survey was conducted by Sumner Dole, Henry Marckres and Kathy Hopkins to identify the most pressing issues facing the maple industry.