What is a pith of a tree?
the pith is the middle of a tree
The pith of a tree is formed during the first year of growth and becomes a storage area for impurities that are deposited from the active xylem during the growth of the tree. The pith or "heart wood" is more resistant to rot and was used for the base of log cabins before foundations. The center of the tree has also been sought ofter for fence posts due to the resistance to rot.
The pith of the tree is formed from the procambium, usually during the first year of growth. The heartwood is not a storage area for "impurities". The heartwood is between the pith and the sapwood. It acts as mechanical support for the tree and contains "extractives" (not impurities) that evolve, over eons, to protect the tree from disease, insects, fungi, fire, and other environmental competitors. Pith isn't even considered as wood. It's usually a spongy…