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

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

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

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

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

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

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

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

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

Wendy has problems getting flowers to grow in one of her flower beds. If she sends a soil sample to the laboratory to get recommendations to correct her problem, she should take cores or slices of soil from:

Rory is studying the pH scale. What number represents neutral?

The pH test on a soil sample determines the:

Clayey textured soils are characterized by:

When indicating or measuring pH, the lower the pH number, the:

Compared to other layers of a typical soil profile, the amount of organic matter in the O horizon is:

A soil test report with a pH of 7.2 is:

What is the texture of soils that have about equal parts of sand, clay, and silt?

Most flowers, shrubs, and lawn grasses grow best in a pH ranging from:

The most desirable soil for noncontainer outdoor plant production is:

What are the three layers of a typical soil profile starting at the soil surface?

A soil test report will include:

When measuring pH, the higher the soil pH number, the:

Which pH reading is acid?

Mark takes some soil samples from his lawn and some from a field where he grows vegetables. Compared to the field samples, his samples from the lawn should be taken:

Which pH reading is alkaline?

What is the percentage of solid soil particles in an ideal soil?