In softwood there is a strong connection concerning the strength of the wood and the number of annual rings.

A bark pocket in the wood is of no importance when assessing the quality of the wood.

A spike branch is normally counted as a bark encased knot.

When deciding the quality of a log all its surface is considered as area to be assessed.

A method to decide if a log is straight enough is to measure its height of bow.

Solid volume percentage is always lower than a 100 %.

Stud damages which occur when the tree is fed through the harvester head are never of any importance as they fall outside of the sawing cylinder.

In Sweden insects are protected by law, therefore insect damages are tolerated in sawlogs.

The definition of an evenly cut sawlog does not put any demand on the log being totally flat in the end surface.

A knot swelling is a bump on the trunk with a knot roughly in the middle of the bump.

Root crevices are most common in Spruce.

Splitting is a variety of crack that one cannot see.

The height of a buttress can be measured by using a caliper.

Rot can originate from different effects, for instance as storage rot

A crack can occur when the tree grows but more often when the tree is processed.