Step 1: Understanding the Concept:
Stump alysis is a classic method in forest mensuration used to determine the past rate of growth of a tree.
It relies on counting and measuring the width of annual growth rings visible on the cross-section of a tree stump after the tree has been felled.
Step 2: Detailed Explation:
Each annual ring visible on a stump represents one year of tree growth in temperate zones and seasol tropical zones:
- By counting the total number of rings from the pith (center) to the cambium (outer edge), the exact age of the tree at stump height can be determined.
- By measuring the radial distance from the pith to each successive ring, the precise radius (and consequently the diameter) of the tree at different stages of its life can be reconstructed.
- This allows researchers to plot a curve showing how the diameter of the tree changed over time (diameter-age relationship).
- This alysis is useful for establishing growth models, estimating rotation periods, and evaluating the historical productivity of a forest stand.
- Stump alysis does not provide direct height or volume data because measurements are restricted strictly to the stump level.
Therefore, it primarily establishes the relationship between age and diameter.
Step 3: Fil Answer:
Stump alysis is used to establish the growth relationship between the age of a tree and its diameter.
Hence, the correct option is (C).