Question

Systems of concentrated regeneration are those silvicultural systems in which regeneration fellings are for the time being concentrated on part of the felling series. Identify the system which is not aimed at concentrated regeneration.

• A. The Clear Felling System followed by artificial regeneration
• B. The Uniform Shelterwood System
• C. The Wedge System
• D. The Selection system

Hint:

Concentrated = Even-aged (everyone born at the same time). Diffused = Uneven-aged (all ages mixed together). Selection System is always the "odd one out" when discussing concentrated harvesting.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
Silvicultural systems are divided into two categories based on how regeneration is spread over the forest: Concentrated (even-aged) and Diffused (uneven-aged). The question asks for the system that does not concentrate regeneration in a specific area at a specific time.

Step 2: Detailed Explanation:

• Concentrated Regeneration: In these systems, all mature trees in a specific unit (block/compartment) are removed over a short period (Clear felling) or in a few stages (Shelterwood). The result is a new, even-aged forest crop in that specific location.

• Evaluation of Options A, B, C: - Clear Felling (A): Entire mature crop is removed at once. Regeneration is highly concentrated. - Uniform Shelterwood (B): Felling is done uniformly over a compartment. Regeneration is concentrated in that compartment. - Wedge System (C): Felling progresses in a wedge shape. Regeneration is concentrated along the advancing edge of the wedge.

• The Selection System (D): This is the quintessential system of diffused regeneration. In this system, individual trees or small groups are harvested throughout the entire forest area periodically. Regeneration occurs continuously in small gaps created by these removals. Because harvesting and regeneration happen everywhere across the forest at all times, it is never "concentrated" in one part.

Step 3: Final Answer:
The Selection system is not a system of concentrated regeneration; it is a system of diffused regeneration.