Spiral grain in trees is created during the growth of the trees. While seedlings show straight upward growth, older trees exhibit a wood fibre formation is a spiral around the trunk. If the direction of the spiralling changes different growth periods, interlocking grain is produced, stabilizing the tree trunk and enabling it to withstand wind shear and canopy load. However, in some trees, the wood fibers show a predilection towards a specific direction. This is called spiral grain, and is caused by a number of factors, such as genetic factors, exposure to wind, asymmetric canopies or water and nutrient distribution in the soil. Since spiral grain causes problems in the wood industry due to the fact that drying timber will warp and become unsuitable to use, the reasons for spiral grain production have been well researched, especially for economically important tree species such as pine and beech. This essay reviews a number of papers discussing the causes of spiral grain formation in order to summarize the most likely reasons why spiral grain is produced.
Aylyn wrote:I am supposed to review the reasons why tree trunks twist, and learned last night that I do not even know how wood is formed within a tree trunk.
Baobab wrote:Aarrggh! I detest doing the bibliography.
Ghostrider wrote:What if the tree's spirit just wanted to change the scenery it was looking out to and decided it needed a twist to do just that!
YES!! That must be it!!!
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Ainevar wrote:if use canz callz uses intelectuelez
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