What is the relationship between tree vigor and sapwood width?

What is the relationship between tree vigor and sapwood width?

• A. Slow-growing trees produce the widest sapwood.
• B. Sapwood width is unrelated to vigor.
• C. Vigorous fast-growing trees with few branch stubs or wounds will produce the widest sapwood.
• D. Sapwood width is determined solely by soil moisture.

Answer: (C)

Vigor drives how much cambial tissue is produced and how far outward the sapwood expands. When a tree is growing vigorously, cambial activity runs strongly, so sapwood is formed more quickly and the width around the trunk increases. Having few branch stubs or wounds means less energy spent on wound repair and compartmentalization, leaving more resources for radial growth and a wider sapwood zone. So, vigorous fast-growing trees with minimal injuries will develop the widest sapwood. Slow-growing trees allocate less to cambial expansion and more to maintenance or repair, yielding a narrower sapwood band. Soil moisture influences growth but does not by itself determine sapwood width; growth rate and injury history are the main determinants.

Vigor drives how much cambial tissue is produced and how far outward the sapwood expands. When a tree is growing vigorously, cambial activity runs strongly, so sapwood is formed more quickly and the width around the trunk increases. Having few branch stubs or wounds means less energy spent on wound repair and compartmentalization, leaving more resources for radial growth and a wider sapwood zone. So, vigorous fast-growing trees with minimal injuries will develop the widest sapwood. Slow-growing trees allocate less to cambial expansion and more to maintenance or repair, yielding a narrower sapwood band. Soil moisture influences growth but does not by itself determine sapwood width; growth rate and injury history are the main determinants.