Certified Arborist Practice Test

The assertion that mature trees are tolerant of severe pruning practices is false. Mature trees generally have a well-established structure and a complex branching system that can be significantly affected by severe pruning. Such practices can lead to stress and long-term damage to the tree, as they disrupt the canopy and can hinder the tree’s ability to photosynthesize effectively.

Severe pruning can also expose the tree to increased risk of pests and diseases due to the wounds created. In many cases, the tree may struggle to recover after heavy pruning, which can lead to issues such as sunburn on exposed bark or improper healing. Therefore, understanding the limits of pruning practices is essential for maintaining the health and integrity of mature trees.

While certain species may handle pruning differently based on their growth habits and resilience, as a general rule, mature trees are not tolerant of severe pruning. Their complex structure and growth patterns make them more sensitive than younger trees, which can often handle more drastic changes. Additionally, the health status of the tree plays a significant role; a healthy tree may cope better to some extent, but severe pruning remains a risk that could compromise its stability and vitality.