Explanation could include

identifying PPE required for the task (required)
describing laws regarding commercial fertilizer application
identifying types of fertilizers
interpreting information on a fertilizer label
describing methods of fertilizing landscape plantings
determining when plants should be fertilized
developing a fertilization schedule
describing how to fertilize plants with granular fertilizer, measuring plants (i.e., caliper or spread), and calculating the quantity of fertilizer needed
describing how to broadcast fertilizer on the surface.

Teacher Resources:

Process/Skill Questions:

What are the methods of fertilizing landscape plantings?
What calculations need to be considered when calibrating rotary and drop spreaders?
What are the advantages of the rotary and drop spreader?
Why is it important to select the appropriate fertilizer for a plant?
What are the benefits of using slow-release fertilizers?
Why should over-fertilization be avoided?
When can organic fertilizers be used in the landscape?
What are the advantages of organic fertilizer?