ISA Tree Selection and Planting

Question 1

Which principle best describes selecting a tree species whose mature size, form, and cultural needs match the available space and site conditions?

Accepted Answer

Right tree, right place

Answer

The 'right tree, right place' principle ensures long-term tree health by matching species requirements to existing site conditions and spatial constraints.

Question 2

When evaluating an urban planting site, which soil characteristic is most critical to assess first?

Accepted Answer

Soil drainage

Answer

Poor drainage leads to anaerobic conditions that suffocate roots and is one of the leading causes of tree decline, making it the most critical factor to assess.

Question 3

What does a USDA Plant Hardiness Zone designation primarily indicate for tree selection?

Accepted Answer

Minimum average annual temperature a plant can survive

Answer

USDA Hardiness Zones are based on average minimum winter temperatures, indicating whether a plant can survive winter cold in a given location.

Question 4

Which tree growth form is MOST appropriate for planting in corridors beneath overhead utility lines?

Accepted Answer

Columnar or fastigiate

Answer

Columnar or fastigiate trees have a narrow, upright growth habit that minimizes horizontal spread and conflict with overhead utilities.

Question 5

When selecting trees for a site with chronically compacted soils, which characteristic is MOST desirable?

Accepted Answer

Tolerance of reduced oxygen in the root zone

Answer

Compacted soils have reduced pore space and lower oxygen levels; selecting species tolerant of low oxygen ensures better establishment and long-term survival.

(ISA) ISA Certified Arborist Practice Test

(ISA) ISA Certified Arborist Practice Test

ISA Tree Selection and Planting