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Which variable is essential for calculating volume per acre in timber inventory?

  1. Tree age

  2. Tree factor multiplied by volume per tree

  3. Forest density

  4. Local weather patterns

The correct answer is: Tree factor multiplied by volume per tree

Calculating volume per acre in timber inventory relies heavily on determining the total volume of timber present in a specific area. To achieve this, it's crucial to know both the volume of individual trees and the number of those trees per acre. The tree factor, which adjusts the amount of timber volume based on specific trees or species, multiplied by the volume per tree, provides the necessary data to establish an accurate estimate of timber volume across the entire area being assessed. While tree age, forest density, and local weather patterns may influence overall forest productivity and growth trends, they do not directly provide the volumetric measurements needed for this specific calculation. Understanding the relationship between individual tree volume and overall stand density is essential for accurate timber inventory assessments, making the combination of tree factor and volume per tree the key components in calculating volume per acre.