Deroisa said trees with split bases can develop problems in the winter time. Water builds up in the split, freezes and expands, and weakens the tree trunk.

This problem is NP-complete and is also a generalization of the Traveling Salesman Problem. In this paper, we present a branch-and-bound algorithm for the exact solution of the Tree QAP based on an ...

Willows can be susceptible to developing these diseased areas, especially if some sort of stress has occurred. Look for any dark or decaying areas, especially at the base of the tree.

Anthracnose, galls and cankers are common problems that trees deal with and fortunately can be defended against.

The Kankakee River Basin and Yellow River Basin Development Commission, which met Thursday in Plymouth, allocated $500,000 for problem-tree and logjam work in Starke and LaPorte counties, said ...