Sunday, March 7, 2010
United States Department of Agriculture
The USDA has a Forest Service, Forest Products Laboratory located in Madison, Wis. This entity serves the public as the nation's leading wood research institute. Some areas of concentration is the comparative decay resistance of heartwood of our native species. As printed by the USDA Forestry division, the top 3 species of wood that fall into the category of Resistant to Very Resistant are:
1. Bald Cypress (Old Growth)
Another interesting fact is that the southern and eastern pines and bald cypress are now largely second-growth with a large proportion of sapwood. Consequently, it is no longer practicable to obtain substantial quantities of heartwood lumber in these species for general building purposes.
Source: USDA Forest Service/wood hand book.
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