Which term denotes the number of trees per acre?

• A. Trees/ac
• B. DBH (Diameter at Breast Height)
• C. Radius (ft)
• D. BA/tree (sq ft)

Answer: (A)

This question is about stocking density—the count of trees occupying a given area. The term that denotes how many trees are in an acre is simply trees per acre, often written as Trees/ac. It directly measures stand density and is used to inform thinning, spacing decisions, and harvest planning. This is different from DBH, which measures how wide a tree is at breast height and is used for estimating volume and growth; radius is a distance measurement; and BA per tree refers to the basal area contributed by an individual tree, which helps compute total stand basal area when combined with density. So, the count of trees per acre is the best descriptor for density: if an acre has 180 trees, that’s 180 trees per acre.