Spring 2021 S2 Hort 1 Unit 5

Which is the best inorganic growing media?

• Bark

• Compost

• Peat moss

• Vermiculite

Perlite and vermiculite are most likely examples of:

• hydroponics.

• organic growing media.

• soil growing media.

• soilless growing media.

Tamicka uses a commercial blend of horticulture soil because she can depend on the pH of the product being:

• acidic.

• alkaline.

• basic.

• neutral.

While the pH of most commercial horticulture soilless mixes is neutral, the pH of bark, peat moss, and sphagnum moss is:

• acid.

• alkaline.

• basic.

• neutral.

What can Vijay add to his soilless mix at planting to add weight and keep his gallon nursery stock from blowing over?

• Bark

• Peat moss

• Perlite

• Vermiculite

The high carbon-to-nitrogen ratio of nondecomposed sawdust and wood shavings affects nitrogen in growing media by:

• acting as a fertilizer.

• increasing availability for plant use.

• making it unavailable for plant use.

• stimulating plant growth.

Zoey uses a soilless horticultural mix for her greenhouse because it:

• comes from the garden.

• has a lot of weight.

• is cheap.

• is sterile.

Which is a lightweight, inorganic mica mineral capable of absorbing a large amount of water in growing media?

• Bark

• Compost

• Leaf mold

• Vermiculite

Which is the most likely effect of adding perlite to the growing media?

• Decreases drainage

• Increases drainage

• Increases weight

• Makes media acid

Pedro adds compost to condition his soil. What is compost?

• Clayey soil

• Decayed organic matter

• Vermiculite

• Volcanic rock