Showing 201 – 210 of all 712 resources in the database
This research project was established in the spring of 2002 to study the technique of lifting sap with simple “sap ladder” tubing structures. It was conducted during the production seasons of 2002 and 2003 in an operational setting at Wheelers Maple Products in Lanark County, Ontario.
Crown dieback and declines in tree health of sugar maple (Acer saccharum) have been reported on various land ownerships in the western Upper Great Lakes region in recent years (MDNR 2009, 2010, 2012). In some areas, the crown dieback has affected high-value crop trees. Historically, sugar maple dieback (fig. 10.1) has been reported more frequently in the eastern part of its range and has not been described on the same scale in the Great Lakes region since the 1950s and 1960s (Bal and others 2015, Millers and others 1989). As a result, fewer studies of canopy health of sugar maple exist in the Midwest than in the Eastern United States.
Plastic is made from hydrocarbons derived from petroleum or natural gas. The hydrocarbons are formed into chains called polymers or plastic resins. Different combinations of hydrocarbon molecules produce different types of plastic. There are seven different types of plastic resins, each with different features. For example, some are resistant to acids and some to caustics. Others may be able to withstand high and/or low temperatures. Some plastics are rigid and some are flexible. There are impact resistant plastics and those that are not. Certain plastics provide a good moisture and/or gas barrier – several are appropriate for contact with food.
Sap flow is only part of what determines the total amount of syrup made (and how much money ends up in a syrup producer’s pocket). New research suggests sugar makers may be advised to look to their trees’ canopies as well as the weather forecast if they want to predict the tapping season.
Feedback received from early users of Leader check-valve adapters, developed by the UVM Proctor Maple Research Center.
The objective of this study was to examine leaf chlorophyll responses of sugar maple seedlings exposed to excess Mn.
Tree growth rate can be an important indicator of how well the tree will heal from tapholes.
At Leader’s Spring Open House, three top experts in tubing and woods management – Glen Goodrich, Mark Erlsten, and Jon Rybkiewicz – sat down for a little over an hour and shared loads of invaluable information on all aspects of installing tubing, tapping trees, and best woods practices.
Exudation is the process whereby trees can generate a large positive pressure in stems or roots during months when the tree is leafless and mostly dormant and temperatures fluctuate above and below freezing. This article aims to provide an update on recent modelling efforts
in combination with experimental measurements from red/sugar maple trees at the University of Vermont Proctor Maple Research Center that validate the model results.
Presents research on taps and tapping practices to maximize yield. Also explains sap flow and tree wounding.