What defines a centrifugal granular spreader?

A centrifugal granular spreader is characterized by its use of mechanical energy to propel granules outward in a circular motion. This type of spreader typically relies on a rotating disc or plate that flings the granules as it spins, allowing for even distribution over a designated area. This mechanical action means that the spreader can cover larger areas more efficiently than manual or non-mechanical methods.

In contrast, options that describe human effort to cast granules refer to more manual methods without mechanical assistance. The description of a device designed solely for liquid herbicides does not apply to a centrifugal granular spreader since it specifically relates to granular materials. Similarly, a non-motorized tool for spreading seeds and fertilizers would not qualify as it lacks the mechanical component that defines a centrifugal spreader. The key feature of using mechanical energy distinguishes it clearly and highlights its effectiveness in applications such as aquatic weed control.