What does the color yellow signify in terms of nozzle classification?

The classification of nozzles by color is a systematic approach used to signify the droplet size produced by different nozzle types. Yellow nozzles are specifically designed to produce medium-sized droplets, which are generally considered to be effective for a wide range of agricultural applications. Medium droplets help achieve a balance between adequate coverage of the target area and minimizing drift, which is essential when applying pesticides or fertilizers.

Medium droplets are typically around 200-400 microns in diameter. This size is advantageous for many aerial applications as it allows enough spray to reach the foliage while reducing the risk of smaller droplets being carried away by wind or evaporation. Consequently, yellow nozzles are commonly chosen for their versatility and effectiveness in various weather and application conditions.

The other colors signify different droplet sizes, with fine droplets being smaller and designed for precise applications, while very fine and coarse droplets have specific uses that cater to particular spraying conditions or products.