The impression prevails that southern hickory is more porous and brash than hickory from the north.

The tests ...

indicate that southern hickory is as tough and strong as northern hickory of the same age.

But the southern hickories have a greater tendency to be shaky, and this results in much waste.

In trees from southern river bottoms the loss through shakes and grub-holes in many cases amounts to as much as 50 per cent.
"It is clear, therefore, that the difference in northern and southern hickory is not due to geographic location, but rather to the character of timber that is being cut.