The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:
a) Radial shakes
b) Heart shakes
c) Wind cracks
d) Twisted fibres
The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:
a) Radial shakes
b) Heart shakes
c) Wind cracks
d) Twisted fibres