Round Type Fertilizer Spreader The centrifugal fertilizer spreader is connected to the tractor with the tractor three-point hitch system. The machine works from the tractor PTO shaft by means of the shaft. It is possible to fertilize optionally by means of the adjustment lever. Equal amount of fertilization is provided on both sides thanks to specially designed outlet openings. There are five types of warehouse capacity, 250-350-300-400-500 lt.