Proctor Maple Research Center - Underhill Center - Vermont
Recent Publications
- Chemical Composition of Scale
- Sustainable Tapping Guidelines
- Tubing Cleaning - Methods Used in the U.S.
- High Vacuum in Gravity Tubing
- Tubing System Age and Sap Yield
- Estimating Twig Starch
- Leader Check-Valve Adapters
- Tubing System Aging
- Sap and Vacuum Dynamics
- UVM PMRC Survey - all respondents
- UVM PMRC Survey - respondents who used CV adapters
- PMRC Research Update 2010
- Antimicrobial Silver in Maple Sap Collection
- Check-Valve Spout Adapter
- 2009 Tapping Survey Results
- 2010 Tapping Survey Results
- Air Injection
- Metabolism Off-Flavor in Maple Syrup: Part I
- Metabolism Off-Flavor in Maple Syrup: Part II
- Guidelines for the Improvement of Combustion Efficiency for Maple Producers
- Timing of Tapping
- Vacuum Sap Collection: How High, or Low, Should You Go?
- Temperature Patterns within an Oil-Fired Maple Evaporator
- Sugar Profiles of Maple Syrup Grades
- Comparison of the "Small" Spout with the Traditional 7/16" Spout
- Wilmot columns from Farming Magazine
Proctor Maple Research Center - Sugaring Operation
Every year, since its purchase in 1946, the
Center has produced maple syrup from its sugarbush. We feel that in order to
understand the needs and problems of the maple industry we must participate in the making
of maple syrup. Our demonstration and education mission involves the operation of a
1,550 tap sugar bush, which through the application of the latest research and technolongy
results in the highly efficient production of maple syrup.
Most of the sugaring activity is centered around the Sumner
Hill Williams Sugarhouse, designed and built in 1992-1993 by sugaring operations
manager, Sumner Williams, with the assistance of PMRC staff and volunteers and
with donations of materials and services of a number of local companies and
individuals. The sugarhouse was expanded in 1999 to accommodate an
expanding educational program sponsored by Husky Injection Molding of Milton,
Vermont. The building was named for Sumner in April 2000 after an accident
claimed his life in October 1999.
In 2004 we initiated a study to contrast and compare the production capability,
cost effectiveness, and maintainability of tubing installations installed by
three tubing manufacturers. This study comprises approximately 1/3 of our
demonstration sugarbush, will be conducted for a minimum of 5 years, and is open
to the public. This offers a unique opportunity to view three different
manufacturers’ products and methods side by side in a field environment.
The syrup produced at the
Center, 750-950 gallons annually, is available through the
University of Vermont Bookstore on campus.
All proceeds from the sales return to the Proctor Center to fulfill our missions
of research, education, and demonstration.
The sugaring operation and staff are available to sugarmakers, school
groups, and the public for tours and learning about the process of sugarbush management
and maple syrup production. While the best time to visit is during sugaring season
(late-February to mid-April), we are open year-round.
Last modified August 04 2006 03:55 PM

