Low drift and documentation

When small drops can also be controlled - proven in practice

Drift is a matter of control—not just droplet size

Drift is often directly associated with small droplets. In practice, the picture is more nuanced. With Danfoil’s air-assisted spray technology, the droplets are given energy and velocity, which makes it possible to work with fine droplets while maintaining controllability.

The point is that the movement of the droplets is determined not only by their size, but also by the momentum they have when they leave the nozzle.

Why air assistance reduces drift

  • Higher droplet velocity – the droplets reach the target faster and are less affected by crosswinds.
  • Directional airflow – helps guide the droplets toward the crop.
  • Stable droplet formation – the droplet spectrum is controlled by air pressure and is less sensitive to pressure variations in the liquid.
  • Low boom height – the combination of air and the correct boom height reduces the drop height and thus the risk of drift.

Important: Low drift is not achieved by using “as much air as possible,” but by the correct air pressure for the task . Too high air pressure can increase turbulence and counteract the effect.

Documented drift reduction

Danfoil’s spraying technology has been tested under controlled conditions. In 2009, Danfoil received a 75% drift reduction certification from the German Julius Kühn Institute (JKI).

The approval documents that air-assisted spraying with Danfoil can significantly reduce wind drift compared to conventional spraying systems—even when using relatively fine droplets.

Drift in practice—not just in the lab

Documentation is important, but drift is also managed in daily operations. With Danfoil, the operator has several tools at their disposal to adjust the spraying:

  1. Air pressure – fine-tuned according to crop and wind conditions.
  2. Boom height – kept low without compromising coverage.
  3. Travel speed – adjusted so that airflow and droplet trajectory remain stable.
  4. Visual inspection – the crop should move slightly, not be “knocked down.”

The combination of these parameters makes it possible to work safely—even under conditions where conventional sprayers often have to give up or switch to coarser nozzles.

Conclusion

Low drift with Danfoil is not about avoiding small droplets, but about controlling them correctly. Air assistance enables both effective deposition and a documented reduction in wind drift—when the system is set up correctly.