Which type of spreader is characterized by its reliance on air pressure?

The blower type granular spreader is characterized by its reliance on air pressure to distribute materials. This type of spreader uses a fan or blower to push air through a tube, which propels granules of fertilizer or pesticide out into the desired area. The use of air pressure allows for a more even and controlled distribution, particularly over large or uneven surfaces, which is often critical in applications such as aquatic weed control where precision is necessary to minimize chemical drift and maximize coverage.

This method is notable for its efficiency and effectiveness in spreading materials over a broad area without the need for mechanical movement of the granules themselves, providing a level of flexibility in how granules are applied. It can be particularly advantageous in environments where other methods may be less effective, such as in areas with dense vegetation or challenging terrain.