The present invention relates to a tractor fertilizer spreader for easily controlling the discharge of fertilizer during the operation of the tractor by opening and closing the opening and closing plate for opening and closing the outlet of the storage hopper automatically by the operation of the hydraulic cylinder. The present invention for this purpose is a storage hopper for storing fertilizer, a dropping device installed at the bottom of the storage hopper and discharged stored fertilizer, and rotary wings installed at the bottom of the dropping device to spray the discharged fertilizer In the tractor fertilizer spreader consisting of, the dropping device is composed of an opening and closing plate for opening and closing the outlet formed on the bottom of the storage hopper, and a lever connected to the opening and closing plate to operate the opening and closing plate, the lever It is coupled to the rod of the hydraulic cylinder operating in the switching operation of the switch installed in the driver's seat of the tractor is automatically operated in accordance with the operation of the hydraulic cylinder is characterized in that opening and closing the opening and closing plate.
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