In mature sugar maple, heartwood expansion upward in the stem primarily affects which aspect of wood products?

In mature sugar maple, heartwood expansion upward in the stem primarily affects which aspect of wood products?

• A. Veneer quality.
• B. Durability against pests.
• C. Colorfastness of sapwood.
• D. Moisture distribution across the board.

Answer: (B)

Heartwood contains natural extractives that deter decay and insect attack. When heartwood expands upward in mature sugar maple, those protective compounds become more widely distributed in the wood that ends up in products, so the material shows greater durability against pests. Other product attributes, like veneer quality, are more about grain and surface appearance; colorfastness of sapwood relates to how sapwood ages and accepts finishes, not to pest resistance; and moisture distribution is driven mainly by drying and permeability rather than the presence of heartwood’s protective compounds.

Heartwood contains natural extractives that deter decay and insect attack. When heartwood expands upward in mature sugar maple, those protective compounds become more widely distributed in the wood that ends up in products, so the material shows greater durability against pests. Other product attributes, like veneer quality, are more about grain and surface appearance; colorfastness of sapwood relates to how sapwood ages and accepts finishes, not to pest resistance; and moisture distribution is driven mainly by drying and permeability rather than the presence of heartwood’s protective compounds.