Certified Arborist Practice Test

Leaving temporary lower branches on a young tree is important for developing trunk taper. As the tree grows, the lower branches play a key role in facilitating the outward growth of the trunk. They provide structural support and stability, which contributes to the tapering effect as the tree matures. This taper is essential for the overall strength and health of the tree, allowing it to better withstand wind and other environmental stresses.

While shade for the trunk, aesthetics, and wildlife damage prevention are considerations in tree care, the primary reason for retaining those lower branches during the early stages of a tree's life is to ensure proper growth and development of the trunk's structure. Proper trunk taper is crucial for long-term tree stability and strength.