ISA Certified Arborist Practice Exam

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Prepare for the ISA Certified Arborist Exam with detailed flashcards and multiple-choice questions, each offering hints and explanations. Ace your certification test!

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What does liquid injection typically involve in arboriculture?

  1. Injecting air into the roots

  2. Spraying leaves with nutrients

  3. Inserting solid fertilizer into the soil

  4. Hydraulic spraying method into soil

The correct answer is: Hydraulic spraying method into soil

Liquid injection typically involves using a hydraulic spraying method to directly inject liquid nutrients or other substances into the soil around a tree's roots. This method is often preferred for its precision and efficiency, and is not the same as injecting air (option A) or spraying leaves (option B). Inserting solid fertilizer into the soil (option C) is also a common practice in arboriculture, but this is different from the liquid injection method mentioned in the question.

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