CGM Horticulture Practices & Plant Health 3

Question 1

What is the primary purpose of performing a soil percolation test before installing an irrigation system?

Accepted Answer

To determine how quickly the soil drains water

Answer

A percolation test measures the rate at which water moves through the soil profile, informing irrigation scheduling to prevent over- or under-watering.

Question 2

Deadheading flowering annuals throughout the growing season is primarily done to:

Accepted Answer

Promote continued blooming by preventing seed set

Answer

Removing spent flowers before seeds mature prevents the plant from diverting energy into seed production, encouraging continuous flower production.

Question 3

Which integrated pest management (IPM) strategy should be applied first before any other control measures?

Accepted Answer

Identify the pest and establish an action threshold

Answer

IPM requires accurate pest identification and establishing an economic or aesthetic action threshold before selecting any control tactic.

Question 4

A grounds manager observes wilting in a newly seeded lawn despite adequate rainfall. The most likely cause is:

Accepted Answer

Hydrophobic soil conditions repelling water

Answer

Hydrophobic (water-repellent) soil, often caused by dry organic matter or certain fungi, can prevent water infiltration even when rainfall amounts appear sufficient.

Question 5

The ANSI A300 pruning standards recommend leaving the branch collar intact when removing a limb primarily because:

Accepted Answer

It contains protective tissue that seals the wound

Answer

The branch collar contains chemically and structurally distinct tissue that compartmentalizes decay and seals over the wound; removing it exposes the trunk to decay.

(CGM) Certified Grounds Manager Practice Test

(CGM) Certified Grounds Manager Practice Test

CGM Horticulture Practices & Plant Health 3