It is applied to investigate tress growth. Through drilling tree core samples, without destruction of trees normal growth, it can identify trees growth rate, age of the trees,trees growth hardness degree and nutrients migration.
Adopt international advanced technology standards, use high quality alloy steel, still intact after more than 200 experiments.
In the 1.3 meters of the tree, horizontally spin the growth awl to the trunk center, when reach the center, make a reverse rotation, and get wood core within core extractor. Tree growth condition can be analysed by watching wood core color distribution.