Question

Find the area in hectare of each permanent periodic block, if the area of each felling series is 2400 hectare, rotation age is 120 years and period is 30 years.

• A. 600
• B. 900
• C. 180
• D. 240

Hint:

Always calculate the total number of blocks first (\(\text{Rotation} / \text{Period}\)) before dividing the total area of the felling series by that number.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
This problem requires calculating the size of an individual periodic block based on the total forest area, rotation age, and the length of each planning period.
Key Formula or Approach:
1. Calculate the number of periodic blocks (\(N\)): \[ N = \frac{\text{Rotation Age}}{\text{Period}} \] 2. Calculate the area of each permanent periodic block: \[ \text{Area of PB} = \frac{\text{Total Area of Felling Series}}{N} \]

Step 2: Detailed Explanation:
Given:
- Total Area = \(2400\text{ hectares}\)
- Rotation Age = \(120\text{ years}\)
- Period = \(30\text{ years}\)
First, determine the number of periodic blocks: \[ N = \frac{120}{30} = 4\text{ blocks} \] Next, calculate the area of each block: \[ \text{Area of PB} = \frac{2400}{4} = 600\text{ hectares} \]

Step 3: Final Answer:
The area of each permanent periodic block is 600 hectares.