With the ever evolving advances in technology, it is easy to overlook some of the simpler ways that were once considered revolutionary. Foam markers , while considered outdated by some, are still a practical feature for many to add on to your self-propelled sprayer.

Before the days of navigation systems and AutoSteer, foam markers where one of the first precision agriculture technologies developed to assist farmers with spray applications to help increase efficiency of applications.

According to the Virginia Tech Extension publication Precision Farming Tools: GPS Navigation , foam markers are the most common form of navigation aid used during fertilizer and pesticide application.

Even though more modern technology allows for more precise accuracy and has the ability to perform more functions, many farmers still like the reassurance that the foam markers bring. It provides the applicator with a visual in the fields as well as serves as a backup plan if something were to go wrong with the GPS system.

Since malfunctioning technology can put a halt to spraying, many applicators see the value in foam markers to help prevent delays in the field.

How do foam markers work?

Using an air pump to pressurize the tank that carries the foaming agent, the fluid then flows into an accumulating chamber. Here the foam collects in the chamber until the foam overcomes the surface tension which causes the foam to fall to the ground.

Foam markers drop foam that is used to align the sprayer during the returning pass. The foam is used as a navigation aid to know where the applicator has already passed. This helps to reduce the risk of under and over application.

While there are many other more advanced options for tracking application in the field, foam markers still hold a great deal of value to many applicators. The low cost involved with purchase makes it easy to justify the added value foam markers bring to your sprayer.