Step 1: Understanding the Question:
This question tests knowledge of the concept of a normal forest.
Step 2: Detailed Explanation:
The trinity of norms of a normal forest includes:
- Normal growing stock (A)
- Normal age gradation (B)
- Normal rotation (C)
Normal increment (D) is not part of the trinity.
Thus, the correct answer is normal increment.
Step 3: Final Answer:
Thus, normal increment is NOT dealt with, which corresponds to option (D).
[0.5cm]