Which method best verifies that the seed treatment unit is applying the target rate?

• A. Visual inspection of coating color
• B. Weighing exact batch after treatment
• C. Run a test with known seed quantity, measure actual product attached vs target rate, and adjust metering accordingly
• D. Rely on operator experience alone

Answer: (C)

Verifying that a seed treatment unit is delivering the intended rate hinges on calibrating the system with real measurements of what actually sticks to the seeds. By running a test with a known quantity of seed and precisely measuring how much coating ends up on those seeds, you obtain the true application rate. Comparing that measured rate to the target lets you adjust the metering settings so the unit delivers the desired amount consistently. This calibration accounts for variations in seed size, density, moisture, and how the coating flows through the equipment, giving you a reliable control factor that can be reused for future batches. Once calibrated, you can repeat the test to confirm the adjustment and maintain accuracy across lots.

Visual inspection isn’t reliable because coating color or appearance doesn’t reliably reflect how much chemical is on the seeds. Weighing an exact batch after treatment shows the total amount delivered for that batch but doesn’t reveal the rate per seed or how to fine-tune metering for future runs. Relying on operator experience alone lacks objective data to ensure consistent application.