CGM Horticulture Practices & Plant Health 2

Question 1

Which pruning technique involves removing a branch back to its point of origin at the trunk or parent branch?

Accepted Answer

Thinning cut

Answer

A thinning cut removes a branch entirely back to its point of origin, maintaining natural branch structure and promoting airflow.

Question 2

What does the term 'hardening off' refer to in horticulture?

Accepted Answer

Gradually acclimating greenhouse-grown plants to outdoor conditions

Answer

Hardening off gradually exposes plants to outdoor temperature, light, and wind fluctuations before transplanting to reduce transplant shock.

Question 3

A grounds manager notices yellowing between leaf veins on newly planted azaleas in high-pH soil. The most likely cause is:

Accepted Answer

Iron chlorosis

Answer

Iron chlorosis causes interveinal yellowing on acid-loving plants like azaleas when high soil pH makes iron unavailable for uptake.

Question 4

Which of the following best describes the function of mycorrhizal fungi in plant health?

Accepted Answer

They extend root surface area to improve water and nutrient uptake

Answer

Mycorrhizal fungi colonize plant roots and extend hyphae into the soil, dramatically increasing the effective absorptive surface area for water and phosphorus uptake.

Question 5

When transplanting a balled-and-burlapped tree, the planting hole should be:

Accepted Answer

Same depth as the root ball and twice as wide

Answer

Planting holes should be the same depth as the root ball but two to three times wider to allow roots to establish in loosened soil without settling below grade.

(CGM) Certified Grounds Manager Practice Test

(CGM) Certified Grounds Manager Practice Test

CGM Horticulture Practices & Plant Health 2