Tree knowledge

Trees are living organisms that are subject to attack by decay or disease-causing natural enemies in the course of their life span. When they suffer from these intrusions, they often express visible symptoms which may be structural or physiological. Tree managers can learn to recognise such symptoms and match them to different kinds of causes. The technique, known as visual tree assessment (VTA), identifies the specific symptoms which can be regarded as the body language of trees.

Try to click on different parts of the tree to learn related observation positions and knowledge!