Increment by continuous forest inventory (CFI) means:
Correct answer: B. All of the above
- A. Used in USA and Canada
- B. All of the above
- C. Sometime metallic rod is fixed in centre
- D. Measured after 5 or 10 years
- E. Large area under first, they can't adopt other method
Explanation
Continuous forest inventory uses permanent sample plots, often marked by a central metal pin or rod, which are remeasured at intervals such as five or ten years. It became especially important in the large forest areas of the United States and Canada.
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