Wood the growth of the young timber in open stands after the old trees have been removed is more rapid than in trees in a closed forest, and in the manufacture of articles where strength is an important consideration such "second-growth" hardwood material is preferred. This is particularly the case in the choice of hickory for handles and spokes. Here not only strength, but toughness and resilience are important. The results of a series of tests on hickory by the U.S. Forest Service show that: The effect of rate of growth on the qualities of chestnut wood is summarized by the
Brushcutter (garden tool) Brushcutter (garden tool) A brushcutter (also called a brushsaw or clearing saw) is a powered garden or agricultural tool used to trim weeds, small trees, and other foliage not accessible by a lawn mower or rotary mower. Various blades or trimmer heads can be attached to the machine for specific applications. It consists of: There are three main types of power unit: There are three types of shaft: Handles vary on brush cutters depending on weight and size of the unit. Larger, more powerful saws employ bike handles (two handlebars on either side of the shaft), and smaller units use