Evaluation should include

combinations of substrate components (e.g., growing mixes or media)
evaluation of soil structure, moisture holding capacity, drainage ability, pH, and fertility for selected container and/or field-grown floriculture crops
analysis of possible soil amendments
chemical supplements for the soil
sterilization of field soils and substrates, using heat treatments, fumigation, and/or chemicals.

Process/Skill Questions:

What are the advantages of using commercially prepared amendments?
How do various amendments affect substrate pH?
Why are some substrates better suited to certain crops than to others?
What is the importance of using sterilized substrates?
What are the advantages and disadvantages of using planting media mixes?
What materials are used in soilless plant media mixes, and why are they used?
What are the differences between organic and inorganic fertilizers?
How does pH affect plant growth and development?
How does poor drainage in soils affect plant growth and development; and what practices can one implement to improve drainage?