Practice Test Geeks(CATS) Certified Arborist Tree Service of Albuquerque Practice Test
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Tree Nutrition and Fertilization Flashcards

7 cards from real CATS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Tree Nutrition and Fertilization flashcards as text

  1. Which macronutrient is most commonly deficient in urban trees and is primarily responsible for chlorophyll production?

    Answer: Nitrogen

    Nitrogen is the most commonly deficient macronutrient in urban trees and is essential for chlorophyll synthesis, making leaves green and supporting overall growth.

  2. What is the recommended soil pH range for optimal nutrient availability in most landscape trees in the Southwest?

    Answer: 6.0–7.0

    A soil pH of 6.0–7.0 is optimal for most landscape trees because it maximizes the availability of major and minor nutrients.

  3. An arborist observes interveinal chlorosis on young leaves of a tree in an Albuquerque landscape. This symptom most likely indicates a deficiency of which nutrient?

    Answer: Iron

    Interveinal chlorosis on young leaves is a classic symptom of iron deficiency, which is common in Albuquerque's alkaline soils where iron becomes unavailable.

  4. Which fertilizer application method places nutrients directly into the root zone and is most effective for trees in compacted urban soils?

    Answer: Deep root liquid injection

    Deep root liquid injection delivers nutrients directly into the active root zone, bypassing compacted surface soils and ensuring efficient uptake.

  5. What is the primary purpose of a slow-release fertilizer formulation compared to a soluble fertilizer?

    Answer: Reduced risk of fertilizer burn and extended nutrient availability

    Slow-release fertilizers reduce the risk of fertilizer burn by releasing nutrients gradually, providing extended availability over the growing season.

  6. According to ISA best practices, the recommended nitrogen application rate for established shade trees per year is generally:

    Answer: 0.5–1.0 lb N per 1,000 sq ft of root zone

    ISA guidelines recommend 0.5–1.0 lb of actual nitrogen per 1,000 sq ft of root zone area annually for established shade trees to avoid over-fertilization.

  7. Which of the following symptoms is most associated with potassium deficiency in trees?

    Answer: Marginal leaf scorch and tip dieback

    Potassium deficiency typically causes marginal leaf scorch and tip dieback because potassium regulates water balance and stomatal function.