Portions of a tree that are unusable for wood products due to cubic-foot volume loss (e g , rotten/missing bole sections, dead material bole sections) or severe form-defect volume loss (e g , severe crook, sweep, forking)
To cull animals means to kill the weaker animals in a group in order to reduce their numbers. To save remaining herds and habitat, the national parks department is planning to cull 2000 elephants. Cull is also a noun. In the reserves of Zimbabwe and South Africa, annual culls are already routine. + culling cull·ing The culling of seal cubs has led to an outcry from environmental groups. the act of killing the weakest animals in a group, especially so that the size of the group does not increase too much
a tree or log of merchantable size made useless for all but firewood because of shape, disease, insect infestation or injury
Any item of production picked out for rejection because it does not meet certain specifications Chip culls and utility culls are specifically defined for purposes of log grading by percentage of sound wood content