Step 1: Understanding the Question:
This question tests knowledge of the history of forest research and terminology.
Step 2: Detailed Explanation:
The term "phytometer" was first used by Metz.
A phytometer is a plant used to measure environmental factors.
A.N. Chaturvedi (A): An Indian forester.
Huber (C): Known for Huber's formula.
Schifel (D): Not a standard name.
Thus, Metz is the correct answer.
Step 3: Final Answer:
Thus, the term phytometer was first used by Metz, which corresponds to option (B).
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