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!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Which term describes organic materials that are carbon-based and decompose slowly?

Leaching
Organic Fertilization
Urea-formaldehyde
Complete Fertilizer

The correct answer is: Organic Fertilization

Organic fertilization is the term used to describe organic materials that are carbon-based and decompose slowly. Leaching (choice A) refers to the process of nutrients being washed away from the soil, which does not directly relate to organic material. Urea-formaldehyde (choice C) is a synthetic fertilizer that does not fall under the category of organic materials. Complete fertilizer (choice D) refers to a type of fertilizer that contains all three primary nutrients (nitrogen, phosphorous, and potassium) but does not necessarily have to be organic. Therefore, organic fertilization is the most accurate term to describe the given description.