CATS Tree Nutrition and Fertilization

Question 1

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

Accepted Answer

Nitrogen

Answer

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

Question 2

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

Accepted Answer

6.0–7.0

Answer

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

Question 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?

Accepted Answer

Iron

Answer

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

Question 4

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

Accepted Answer

Deep root liquid injection

Answer

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

Question 5

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

Accepted Answer

Reduced risk of fertilizer burn and extended nutrient availability

Answer

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

(CATS) Certified Arborist Tree Service of Albuquerque Practice Test

(CATS) Certified Arborist Tree Service of Albuquerque Practice Test

CATS Tree Nutrition and Fertilization