Lawn spreaders perform the same basic function, that of spreading something over a wide area. They do this by dropping or tossing loose material from a central container while you wheel them. Lawn spreaders consist of a container sitting on wheels with a handle. As you push the spreader, movement created by the wheel axis turns a device inside the container that drops or tosses the material within the container out of the spreader. The movement of the spreader allows you to distribute the contents of the container over a large area as you walk.
You can use spreaders to distribute any loose material throughout the garden. This includes layers of soil, seeds and fertilizer. Using a spreader helps you sow seeds over a large area or distribute new soil or fertilizer throughout an entire garden or lawn without the laborious process of doing so by hand. If you make your own fertilizer through composting, you can use a spreader to distribute this compost throughout a garden or lawn. Numerous secondary uses for spreaders also exist, such as spreading salt or sawdust over large patches of ice during the winter to reduce the risk of slipping.
Ground spreader can also refer to a piece of photographic equipment used on the bottom of a tripod. The ground spreader constitutes the bottom of a tripod, where the feet connect to the legs. Spreaders allow photographers and cinematographers to adjust the distance of each tripod leg from the center of the unit. This function allows users to balance the unit on uneven terrain and adjust its stability to account for the weight of the camera.
Camera equipment manufacturers produce numerous types of ground spreaders. Some come with spikes for use on slippery or icy terrain. Others exist to extend legs to different lengths for use in staggered settings like staircases. Photographic ground spreaders are used with specific types of cameras based on the weight of the camera. Never use a spreader designed for use with lightweight cameras with heavy equipment like film or large video cameras.