Nursery 2019

1 Which of these is NOT a benefit of using mulch around landscape plants 

• add nutrients to the soil

• help control weeds

• help prevent bark damage when string trimming

• Conserve soil moister

2 Propagating plants using seeds that have a hard seed coat often involves scratching the seed coat in a process known as:

• Grafting

• Stratification

• Gradation

• Scarification

3 Correcting low soil pH can be achieved by applying

• Lime

• Potassium

• Phosphorus

• Nitrogen

4 Fertilizer is often applied through the irrigation system. This is often referred to as 

• Fertigation

• Chemigation

• Post-fertilization

• Fertilizer enhancement

5. While the desirable soil pH for plants varies by species, a general range for
most landscape plants is:

• 1.0 to 7.0

• 5.0 to 10

• 5.5 to 6.5

• 1.0 to 14

6. Which of the following is a naturally occurring plant hormone which causes the
elongation of cells in shoots and is often used as a root-promoting substance
on cuttings used for propagation?

• Ethylene

• Auxin

• Citric acid

• Portulaca

7. The amount of a pesticide required to kill half of a population is referred to as

• LD50

• The re-entry level of a pesticide

• The half-life of the pesticide

• The 50-50 rating

8. A tree planted in the landscape that will grow up to 70 feet tall at maturity
should be planted no closer than _____ feet from the hous

• 5 to 10

• 10 to 15

• 20 to 25

• 80 to 90

9. Iron chlorosis may be effectively treated with a product called ___________
iron.

• Chlorotic

• Anti-deficiency

• Chelated

• Formosan

10. This is a common disease caused by fungi and found throughout the United
States. It is easily recognized by a white to gray powdery growth, usually on
the upper leaf surface

• Mealy fungi syndrome

• Powdery mildew

• Cedar-apple rus

• Powdery scale