![]() Timing: freezing temperatures at night and above 2 degrees Celsius during the day trigger sap flows tapping too early in the season can lead to drying out of the taphole and reduced sap yields unless a properly installed tubing system is used tapping too late in the season could miss important sap runs tapping in deeply frozen wood has been shown to cause damage to the tree through splitting of the inner bark.Trees with major injuries, broken tops, or signs of decay may be of low vigour and not worth tapping good sap only flows from unstained, white sapwood and is readily seen in the shavings which are produced when drilling the taphole.Flagging tape is used to mark the tappable trees and can indicate the number of taps a tally of the taps can be made and even noted on a sketch map of the woodlot coloured chalk marks can also be used. ![]()
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