[2] Significant value can be lost by sub-optimal bucking because logs destined for plywood, lumber, and pulp each have their own value and specifications for length, diameter, and defects.
[4] A felled and delimbed tree is cut into logs of standard sizes, a process called bucking.
The bucker will anchor the end of an auto rewinding tape measure which is attached to his belt and walk down the log trimming as he goes.
The tape is anchored gently with a bent horseshoe nail in the bark so it can be jerked loose when the measurement is completed.
It is common for log buyers to issue purchase orders for the length, diameter, grade, and species that they will accept.