What method uses gravity to distribute granules over an area?

The correct answer is the drop spreader, also referred to as a gravity spreader. This tool utilizes the principle of gravity to ensure that granules, such as fertilizers or seeds, are evenly distributed over a designated area. As the spreader moves forward, the material is released from a hopper through a drop mechanism that allows it to fall directly onto the ground below.

This method is advantageous because it provides precise control over the distribution pattern, minimizing waste and reducing the risk of applying too much product in any one area, which is essential for promoting healthy growth in turf and ornamental plants. The ability to adjust the spread width and the rate of application improves accuracy, allowing for consistent coverage.

In contrast, other methods like hand broadcasting distribute materials by hurling them by hand, which can lead to uneven application and is not reliant on gravity in the same way. Overhead spreading involves broadcasting materials from an elevated position, which can also lead to unpredictable dispersal patterns. Additionally, gravity feed systems may refer to a more general method of material delivery without the specific control and application benefits provided by a drop spreader.