Lumbering and Milling Wood must be seasoned or dried in the open air, in kilns , or with fans. It is then cut and shaped. Wood is tested for its response to tension, shear, cleavage, compression, and cross breaking. Veneer is thinly sliced wood used for decorative layers. Veneer may be shaved off a revolving log.
Plywood is made of thin layers glued together, each at a right angle to the layer beneath.
Particleboard consists of sawdust and chips in a resin matrix. Fiberboard -is made from separated xylem elements that have been put back together. While bamboo is used much like wood, it has no secondary xylem and no cambium. Half of the land originally covered by forest has been deforested. All remaining harvestable forests have been logged to some extent.