Which statement describes why seed treatment rates may be expressed as mg ai/kg seed or per-seed dose?

• A. Because it is a mythical concept.
• B. Because two different units help ensure compatibility with all labels.
• C. Because labels may specify either milligrams per kilogram or per-seed dose.
• D. Because it is easier to measure.

Answer: (C)

Rates are given in different units because labels describe application in the unit that fits how you measure and apply the product. Some labels specify the dose as milligrams of active ingredient per kilogram of seed, while others specify a per-seed dose. Having both expressions lets you apply correctly whether you’re dosing by seed count or by seed weight. If you know how many seeds you’ll plant per kilogram, you can convert between units (per-seed dose times seeds per kilogram gives mg/kg, or mg/kg divided by seeds per kilogram gives the per-seed dose). This flexibility accommodates variations in seed size and different planting setups.