LARE LARE Prep Section 3

Question 1

Which plant hardiness zone system is most commonly used in the United States to guide plant selection?

Accepted Answer

USDA Plant Hardiness Zone Map

Answer

The USDA Plant Hardiness Zone Map, based on average annual minimum winter temperatures, is the standard reference for plant selection in the US.

Question 2

A landscape architect specifies a tree with a 'caliper' measurement. Caliper refers to the trunk diameter measured:

Accepted Answer

At 6 inches above grade for trees up to 4-inch caliper

Answer

Per ANSI Z60.1, caliper is measured at 6 inches above grade for trees up to 4-inch caliper, and at 12 inches for larger trees.

Question 3

What is the primary function of a 'root barrier' installed along a sidewalk adjacent to a large-caliper tree?

Accepted Answer

To direct root growth downward and away from pavement

Answer

Root barriers redirect tree root growth downward rather than horizontally, preventing pavement heaving while keeping the tree in place.

Question 4

Allelopathy in the context of planting design refers to:

Accepted Answer

Chemical inhibition of one plant's growth by another plant's secretions

Answer

Allelopathy describes the biochemical inhibition or stimulation of one plant species by chemicals released by another, affecting planting compatibility.

Question 5

When developing a plant palette for a public plaza in a high-pedestrian urban environment, which characteristic is LEAST important to prioritize?

Accepted Answer

Seasonal wildlife habitat value

Answer

In a high-pedestrian urban plaza, wildlife habitat value is less critical than tolerance to urban stresses, maintenance, and safety concerns.

LARE Test Practice Test

LARE Test Practice Test

LARE LARE Prep Section 3