CLARB Planting Design and Ecology

Question 1

Which USDA Plant Hardiness Zone map resource is most commonly referenced when selecting plants for a CLARB exam project in the continental US?

Accepted Answer

USDA ARS Plant Hardiness Zone Map

Answer

The USDA ARS Plant Hardiness Zone Map is the standard reference for determining minimum winter temperatures and plant cold-hardiness in the US.

Question 2

A landscape architect specifies a 'plant community' approach for a restoration site. What does this primarily mean?

Accepted Answer

Plants are grouped based on their native ecological associations and environmental tolerances

Answer

A plant community approach groups species that naturally co-occur and share ecological relationships, supporting habitat function and long-term resilience.

Question 3

What is the primary purpose of specifying a soil amendment such as compost at a rate of 3 inches tilled to 12 inches depth in a planting bed?

Accepted Answer

To improve soil structure, drainage, and nutrient content for plant establishment

Answer

Incorporating compost improves aeration, water retention, and nutrient availability, creating better conditions for root development and plant establishment.

Question 4

Which term describes the gradual replacement of one plant community by another over time?

Accepted Answer

Ecological succession

Answer

Ecological succession is the process by which the structure of a biological community evolves over time through predictable stages.

Question 5

On a CLARB planting plan, what does the abbreviation 'B&B' typically indicate about a plant specimen?

Accepted Answer

Balled and burlapped — the root ball is wrapped in burlap for transplanting

Answer

B&B (balled and burlapped) specifies that the plant is dug with a soil ball around the roots and wrapped in burlap to retain moisture during transport.

CLARB - Council of Landscape Architectural Registration Boards Practice Test

CLARB - Council of Landscape Architectural Registration Boards Practice Test

CLARB Planting Design and Ecology