Illinois Field Crop Applicators Practice Test

What information must the operator input into the spray rate controller?

1. Duty cycle

2. Soil type

3. Wind speed

4. Crop type

The correct answer is: Duty cycle

The operator must input the duty cycle into the spray rate controller because it is a critical factor that helps determine the timing and efficiency of the spraying operation. The duty cycle indicates the ratio of active spraying time to the total operational time, which directly affects how much pesticide or fertilizer is applied during application. This setting allows for precise control over the application rate to ensure that the intended amount of product is delivered to the crop while reducing the risk of over-application or environmental contamination. Other factors like soil type, wind speed, and crop type can influence the overall spraying strategy but are not parameters that need to be inputted directly into the spray rate controller. Soil type may affect how crops respond to the spray, wind speed can impact drift and application accuracy, and crop type may inform the operator about the sensitivities and appropriate products to use. However, the duty cycle is specifically related to controlling the equipment's operation and application rate, making it essential for optimal performance.