Appendix 2 spacer Eight Tips for Accurately Determining Age
Lessons
Lesson 1
Lesson 2
Lesson 3
Lesson 4
Lesson 5
Lesson 6
Lesson 7
Lesson 8
Lesson 9
Lesson 10
Lesson 11
Lesson 12
Appendices
Appendix 1
Appendix 2
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1. Use an Accurate Method to Determine Age

2. Take a Quality Increment Core

3. Prepare the Surface for Counting

4. Accurately Locate the Pith and First Ring

5. Carefully Count Rings

6. Correctly Account for the Last Ring

7. Double Check

8. Office Counting


Appendix 3
Appendix 4
Appendix 5
Appendix 6
Appendix 7
Appendix 8
Appendix 9
Course Homepage
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3. Prepare the Surface for Counting

On both an increment core and a cut face, wetting the surface may make rings more visible. Also, shaving a thin layer of wood from the surface will often make rings more visible. If you are felling the tree, use a sharp handsaw to make sure the rings are clear.

Prepare the surface for counting


4. Accurately Locate the Pith and First Ring

On the increment core (or stem cross-section), locate the pith. Generally, the pith is an oval-shaped area of darker, spongier material. Confirm that you’ve got the pith by making sure that the rings closest to it form concentric circles around the pith.

To locate the first ring, consider where the core or cut was taken within the internode. At the top of the internode, little wood has formed so the first ring is very close to the pith. At the bottom of the internode, more wood has formed so the first ring is farther away from the pith. Also, consider the thickness of wood on the leaders of the sample trees. A species with a thick woody leader (such as Pl) will have the first ring well away from the pith.

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