Sample of flat-cut mapleLook at this sample of wood. Based on the grain, was this wood likely cut as flat sawn or quarter sawn?

What is the most significant issue to cause deterioration of wood?

Wood that is quarter sawn is more resistant to deformation as it dries that flat sawn wood.

The principle difference between hardwoods and softwoods is the hardness of the wood, as determined by the Janka Hardness Test.