This seed spreader is perfect for quickly and evenly distributing seed over large areas. It is designed with a wide hopper that can hold up to 50 pounds of seed, and a large, adjustable spreader plate that can be adjusted to spread seed from a narrow to a wide pattern.
From Wikipedia
A broadcast seeder, alternately called a broadcaster, broadcast spreader or centrifugal fertilizer spreader (Europe) or "spinner" (UK), is a farm implement commonly used for spreading seed where no row planting is required, lime, fertilizer, sand, ice melt, etc., and is an alternative to drop spreaders/seeders. Apart from spinners there is also a type of broadcast spreader called "wagtail spreader", used with tractors.