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

Frost cracks (radial bark splits) on the southwest side of thin-barked trees in winter are best explained by:

Fungal cankers expanding in bark during cold periods Rapid temperature differential causing differential wood contraction Salt spray accumulation on bark during winter storms Boring insect galleries weakening the southwest trunk face

Correct Answer:

Rapid temperature differential causing differential wood contraction

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