How does a rotary spreader distribute fertilizer?

A rotary spreader distributes fertilizer effectively by utilizing a rotating impeller. As the impeller spins, it flings the fertilizer outward in a broad pattern. This mechanism allows for uniform coverage over a wider area compared to other methods of application. The centrifugal force generated by the rotating impeller ensures that the granules are spread evenly across the intended surface, facilitating optimal nutrient distribution for plants.

Other methods of application, such as moving the spout side to side, applying in confined areas, or spreading over a very narrow swath, do not leverage the mechanical advantages provided by the impeller. Instead, these methods could lead to uneven distribution and may not cover large areas as efficiently as a rotary spreader does.