Prepare the Surface for Counting
http://www.for.gov.bc.ca/hfp/training/00011/append02b.htm
* Wetting the surface may make rings more visible.* Shaving a thin layer of wood from the surface will often make rings more visible.
At the bottom of tree the first ring is far from the pith
sample taken the more far from the bottom, the first ring is more farther from the pith.
- from 9,10,11
- marking,
- Mill drill
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