Horticulture I 5.01

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

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

• acidic

• alkalne

• basic

• neutral

Perlite and vermiculite are most likely examples of:

• hydroponics

• organic growing media

• soil growing media

• soilless growing media

Which is the best inorganic growing media?

• bark

• compost

• peat moss

• vermiculite

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

• Decreases drainage

• increases drainage

• increases weight

• makes media acid

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

• bark

• compost

• Leaf mold

• Vermiculite

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

• comes from the garden

• has a lot fo weight

• is cheap

• is sterile

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

• Clayey soil

• Decayed orgnaic matter

• Vermiculite

• Volcanic rock