5.01

Perlite and vermiculite are most likely examples of:

• hydroponics

• organic growing media.

• soil growing media.

• soilless growing media.

Which is the best growing media if an inorganic media is desired?

• Leaf mold

• Perlite

• Sawdust

• Wood shavings

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

• comes from the garden.

• has a lot of weight.

• is cheap.

• is sterile.

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.

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

• Clayey soil

• Decayed organic matter

• Vermiculite

• Volcanic rock

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

Which is the best inorganic growing media?

• Bark

• Compost

• Peat moss

• Vermiculite

Of these materials, which is the best for use in an organic growing media?

• Bark

• Perlite

• Styrofoam beads

• Vermiculite

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

• acidic.

• alkaline

• basic

• neutral

Marcy mixes perlite in her soilless mix. What is perlite?

• Bark from a pecan tree

• Dead plant material

• Natural volcanic rock

• Product of seaweed