Which is the best source of information about wind direction when sensitive crops are adjacent to the target area?

The best source of information about wind direction when sensitive crops are adjacent to the target area is the use of an aircraft smoker. An aircraft smoker is specifically designed to release visible smoke, allowing for a clear visualization of wind direction and movement during aerial application. This is crucial in ensuring that sensitive crops are not adversely affected by drifting chemicals or fertilizers.

In contrast, weather reports may not provide real-time or localized wind conditions that are directly applicable to the specific aerial application scenario, as they typically reflect broader regional weather patterns. Ground indicators, while helpful, may not accurately capture the wind conditions at the altitude at which aerial applications occur. Aerodynamic sensors are also useful, but they are more specialized instruments that might be less accessible or practical for real-time monitoring during the application process. The aircraft smoker provides a direct and immediate assessment of wind direction, which is essential for making informed decisions during aerial applications around sensitive areas.