Landscape Design Soil Science and Site Preparation

Question 1

What is the ideal soil texture for most landscape plantings, balancing drainage and water retention?

Accepted Answer

Loam

Answer

Sand

Answer

Clay

Answer

Silt

Question 2

What soil test result is most important before amending soil for a new landscape installation?

Accepted Answer

pH and nutrient levels (N, P, K)

Answer

Compaction depth only

Answer

Organic matter percentage only

Answer

Microbial activity count

Question 3

What does soil compaction do to plant root development?

Accepted Answer

Restricts oxygen flow and root penetration, stunting growth

Answer

Improves water retention for drought tolerance

Answer

Increases nutrient availability

Answer

Promotes faster establishment

Question 4

Which organic matter amendment is most commonly incorporated into planting beds to improve soil structure?

Accepted Answer

Compost

Answer

Perlite

Answer

Vermiculite

Answer

Sand

Question 5

What is a soil horizon relevant to landscape grading and planting?

Accepted Answer

A distinct vertical layer of soil with different characteristics

Answer

The top layer of mulch above soil

Answer

The slope angle of a graded site

Answer

The depth to the water table

Question 6

What is the purpose of soil aeration in landscape management?

Accepted Answer

Relieve compaction and improve air, water, and nutrient movement

Answer

Apply fertilizer to the root zone

Answer

Remove thatch from turfgrass

Answer

Control soil pH