CGM Grounds Maintenance & Landscape Management 3

Question 1

A CGM is evaluating a soil test that shows a pH of 5.2 for a cool-season turfgrass area. Which amendment should be applied?

Accepted Answer

Lime

Answer

Lime (calcium carbonate) raises soil pH, and most cool-season turfgrasses perform best between pH 6.0 and 7.0.

Question 2

What is the primary function of a backflow preventer in an irrigation system?

Accepted Answer

To prevent contaminated water from flowing back into the potable supply

Answer

A backflow preventer stops reverse flow that could introduce fertilizers, pesticides, or contaminants into the drinking water supply.

Question 3

Which grass species is best suited for a high-traffic athletic field in a warm-season climate?

Accepted Answer

Bermudagrass

Answer

Bermudagrass is highly traffic-tolerant, heat-hardy, and recovers rapidly from wear, making it ideal for warm-season athletic fields.

Question 4

When applying pesticides near a water body, which label requirement takes precedence over all other application decisions?

Accepted Answer

The pesticide label as a legal document

Answer

The pesticide label is a legal document under FIFRA, and all applicators must follow its instructions, including buffer zones near water bodies.

Question 5

What is the recommended practice for managing clippings on a healthy, well-fertilized lawn?

Accepted Answer

Mulch clippings back into the turf to return nutrients

Answer

Mulching clippings returns nitrogen and organic matter to the soil, reducing fertilizer needs without contributing significantly to thatch.

(CGM) Certified Grounds Manager Practice Test