In the Doyle Log Scale, which pair of measurements is used to estimate log volume?

In the Doyle Log Scale, which pair of measurements is used to estimate log volume?

• A. Height and crown width.
• B. Diameter and length.
• C. Age and species.
• D. Weight and moisture content.

Answer: (B)

The Doyle Log Scale estimates log volume from the log’s size, using diameter at the small end and the log length. These two measurements capture the cross-sectional area and how much log length there is, which together determine how much wood is present. In the Doyle rule, volume is roughly proportional to the square of the small-end diameter and the length, often expressed as a formula like board feet ≈ (D − 4)^2 × L / 16, with D in inches and L in feet. This approach keeps the estimate simple and practical, not requiring age, species, height, crown width, weight, or moisture content.

The Doyle Log Scale estimates log volume from the log’s size, using diameter at the small end and the log length. These two measurements capture the cross-sectional area and how much log length there is, which together determine how much wood is present. In the Doyle rule, volume is roughly proportional to the square of the small-end diameter and the length, often expressed as a formula like board feet ≈ (D − 4)^2 × L / 16, with D in inches and L in feet. This approach keeps the estimate simple and practical, not requiring age, species, height, crown width, weight, or moisture content.