How should nozzles on the spray boom be adjusted to account for the influence of prop wash?

Repositioning the nozzles on the spray boom is crucial to accurately apply pesticides or fertilizers while accounting for the influence of prop wash. Prop wash refers to the turbulent air created by the aircraft's propeller, which can cause a drift of the spray material. By adjusting the position of the nozzles, applicators can ensure that the spray is delivered more effectively to the target area, as this adjustment allows the applicator to align the nozzles with the airflow created by the prop wash. This positioning can help minimize drift and ensure better coverage on the intended surfaces.

The other options, while they may seem plausible, do not address the specific interaction between the nozzles and the prop wash effectively. Shortening the length of the nozzles does not necessarily change their alignment with the airflow, increasing the diameter may lead to a greater volume of spray that could exacerbate drift, and angling the nozzles upward might create an inconsistent spray pattern that is less effective in reaching the target. Thus, repositioning the nozzles is the most effective method to adapt to the dynamics introduced by prop wash.