Question:

Which one of the following is the first to be removed in a thinning operation?

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Thinning criteria:
- Remove: Diseased, malformed, suppressed trees.
- Retain: Healthy, vigorous, well-formed trees.
- Improves stand health and quality.
  • Underdeveloped trees
  • Diseased trees
  • Fruitless trees
  • Healthy trees
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The Correct Option is B

Solution and Explanation

Step 1: Understanding the Question:
This question tests knowledge of thinning operations and selection criteria.

Step 2: Detailed Explanation:

The first trees to be removed in a thinning operation are diseased trees.
This is followed by malformed, suppressed, and less vigorous trees.
Underdeveloped trees (A): Removed later.
Fruitless trees (C): Not a primary selection criterion.
Healthy trees (D): Never removed.
Thus, the correct answer is diseased trees.

Step 3: Final Answer:

Thus, diseased trees are the first to be removed in a thinning operation, which corresponds to option (B).
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