Drying Kinetics: Tension Wood In Fagus Sylvatica And Compression Wood In Picea Abies.
Hardwoods that lean badly or have lopsided crowns often have reaction wood
on the backside--tension wood that is brittle and weak.
Trees lean all the time to reach the light, and reaction wood
helps them stand up despite the fact that they're leaning," Snyder said.
Rings that are large on only one side of the tree indicate reaction wood
growth to reinforce the tree's strength against gravity after a hurricane or landslide gave it the old gangster lean.
Table 1 is an example taken from the Austrian Wood Trading Regulations (OHHU 2006) guidelines in which the two features crookedness and reaction wood
proportion are shown.
For instance, if a tree has been bent by another tree falling against it or by a boulder rolling down on one side of it, reaction wood
will form along one side of the trunk and bend the trunk back to a vertical position again.
When a coniferous tree leans, reaction wood
is produced on the lower side in association with wider rings that enable the tree to grow upright again (Wardrop, 1964).
The low grade was selected according to class C of the Austrian timber grading rules, which defines this wood as below-average quality, showing considerable knottiness, high reaction wood
and spiral grain, pitch pockets, and other acceptable defects.
as a proportion of the cross section area of the log;
Limbwood contains a great deal of reaction wood
whose mechanical properties are much different from normal wood.
wood laid down when the stem is within the active crown of the tree) [13,17], and the occurrence of reaction wood
 are highly correlated to wood strength and stiffness.
But it appears to have paid off judging by the reaction Woods
receivedasheenteredthelegendary amphitheatre that represents the spirit of this magnificent 7435-yard golfing utopia.