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Unformatted text preview: drying characteristics than wood with more uniform growth. This affects its commercial use. Knots are caused by branches that originated when the stem was younger and subsequently died. Branches formed lower on the stem often die as the tree increases in height. The eventual growth in stem girth surrounds the dead branch, forming a knot. Knots can be tight (if there is a cambium connection between the branch and trunk or loose if there was bark surrounding the branch. Deciduous is another term used with trees. Deciduous refers to a seasonal loss of all of a tree's leaves. Some trees are evergreen, which means that individual leaves are replaced as they die....
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- Fall '09