Which of the following best described the meaning of 'Fertilizer rate and analysis'?

• A. The time of day of application.
• B. The weather conditions during application.
• C. The amount and composition of fertilizer applied.
• D. The type of grass species.

Answer: (C)

Fertilizer rate and analysis describes two things you need to know about every fertilizer you apply: how much you are applying and what nutrients are in it. The rate is the quantity per area, typically pounds per acre (or kilograms per hectare), showing how much product is spread. The analysis, or guaranteed analysis, lists the nutrient content of the fertilizer (such as nitrogen, phosphorus as P2O5, and potassium as K2O, and sometimes other nutrients) usually shown as percentages on the bag. Together, they tell you exactly how much nutrient you’re delivering and in what composition, which helps you meet crop needs and follow labeling. It isn’t about the time of day, weather, or the grass species; those factors matter for management but are not what rate and analysis describe. For example, a fertilizer labeled 20-5-10 applied at 40 lb per acre delivers 8 lb of nitrogen, 2 lb of P2O5, and 4 lb of K2O per acre.