ISA BCMA Practice Questions - ISA Board Certified Master Arborist (BCMA) Exam

Girdling roots that wrap around the base of a tree most directly cause decline by which mechanism?

Releasing toxic exudates into the surrounding rhizosphere Compressing vascular tissue and restricting water transport Lowering soil pH throughout the confined root zone Increasing mycorrhizal colonization at the root flare

Correct Answer:

Compressing vascular tissue and restricting water transport

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