Certified Forester Practice Exam

What primary factor affects the per acre conversion factor in tree inventory?

1. Soil composition

2. Diameter class of trees

3. Species diversity

4. Geographic location

The correct answer is: Diameter class of trees

The primary factor affecting the per acre conversion factor in a tree inventory is the diameter class of trees. This is because the diameter of trees is crucial for calculating various forestry metrics, such as volume, biomass, and density. In forestry, the diameter of trees is often categorized into classes, which helps in assessing the growth phases of a forest and understanding its structure. Different diameter classes can yield different conversion factors since larger trees typically contribute more biomass and volume compared to smaller trees. The distribution of trees by diameter class can significantly impact the estimated volume and overall value of the timber on a per acre basis. While soil composition, species diversity, and geographic location all play important roles in forest growth and management, they do not have as direct an impact on calculating the per acre conversion factor as diameter classes do. Understanding how tree size influences yield is essential for accurate forest inventory and management practices.