a tool used to extract a core of wood from a living tree for the purpose of studying the annual growth rings of the tree.
a hollow shaft of steel with a sharp threaded bit at the tip
A device used to drill into a tree and extract a core in order to count the rings and determine the age and growth of the tree.
auger-like tool used to extract cores from the tree trunk to find age
A tool used to take a "core sample" from a living tree to determine its age, growth rate and health.
An auger-like instrument with a hollow bit used to extract cores or cylinders of wood from trees with annual growth rings for increment and age determination, e.g., Pressler's borer. ( BCFT).
A T shaped tool consisting of a bit, a handle and an extractor that is used to measure the age or growth rate of a tree. The bit is hollow and when turned into the tree, cuts a pencil shaped piece of wood showing the growth rings. By counting the number of rings in the inch of wood closest to the bark, a statement can be made about the increase in tree diameter in the last "x" years. By drilling into the center of the tree, its age can be determined by counting annual rings.
an augerlike tool with a hollow bit designed to extract cores from tree stems for the determination of age and growth rate.
A tool used to extract a core of wood from a tree. Using this technique, the age and condition of trees can be determined without destroying the tree. This tool should only be used by professionals because it can allow insects and disease to enter the tree, especially in urban areas.
A hollow auger-like tool with a screw bit used to remove core samples from trees.
