Aspen Bibliography
Wet Wood, Bacteria, and Increased pH in Trees
Document Type
Report
Source
USDA Forest Service
Issue
No. 2215
Publication Date
4-1961
Abstract
The knowledge of the differences between sapwood and heartwood and the transition from one to the other leaves much to be desired. The common assumption has been that heartwood formation coincides with the natural death of the parenchyma due to its age, or as in oak to its distance from the cambium. In the pines, Douglas-fir, oaks, and some other common trees, heartwood is more acid than sapwood, and in the pines and Douglas-fir, it is lower in moisture. Both heartwood and sapwood of healthy trees are thought of as ordinarily free from micro-organisms except for the heart-rotting Hymenomycetes or local infections near wounds. For the most important commercial genera, there is little reason to challenge this view.
Recommended Citation
Hartley, Carl, Davidson, Ross, Crandall, Bowen S. 1962. Wet wood, bacteria, and increased pH in trees. USDA Forest Service.