CATS Tree Nutrition and Fertilization 2

Question 1

What is the best time of year to apply fertilizer to deciduous trees in the Albuquerque area to maximize uptake?

Accepted Answer

Late fall after leaf drop or early spring before bud break

Answer

Midsummer during peak heat

Answer

During drought stress periods

Answer

Immediately after heavy pruning

Question 2

A soil test in an Albuquerque urban landscape reveals pH of 8.2. What amendment would an arborist most likely recommend to improve micronutrient availability?

Accepted Answer

Elemental sulfur

Answer

Lime (calcium carbonate)

Answer

Potassium chloride

Answer

Superphosphate

Question 3

Which nutrient is classified as a secondary macronutrient and plays a critical role in cell wall structure and root tip development?

Accepted Answer

Calcium

Answer

Iron

Answer

Manganese

Answer

Zinc

Question 4

When conducting a foliar nutrient spray for iron deficiency in Albuquerque, which iron chelate formulation performs best in high-pH soils?

Accepted Answer

FeEDDHA

Answer

FeEDTA

Answer

FeDTPA

Answer

FeCitrate

Question 5

What does the N-P-K ratio on a fertilizer label represent?

Accepted Answer

Nitrogen, Phosphorus, Potassium percentages by weight

Answer

Number of applications, pH, and Kilogram weight

Answer

Net nutrients, plant-available portion, and known compounds

Answer

Nitrogen, Potassium, and Phosphate molecular weights

Question 6

Which fertilization method is most appropriate for a large mature oak tree on a property with a well-maintained lawn where surface disturbance must be minimized?

Accepted Answer

Deep root liquid injection outside the drip line

Answer

Broadcast granular fertilizer over the lawn surface

Answer

Trunk implant capsules

Answer

No fertilization is needed for mature trees

Question 7

Over-fertilizing a tree with excessive nitrogen can lead to which of the following negative outcomes?

Accepted Answer

Stimulated excessive soft growth susceptible to pests and disease

Answer

Increased drought tolerance

Answer

Improved root-to-shoot ratio

Answer

Enhanced fruit and seed production