PROBLEM TO BE SOLVED: To simultaneously dig out field crops such as potatoes and perform seeding of a cover crop.SOLUTION: An earth screening conveyer 2, the front end of which has a hoe 3, is mounted to a traveling machine body with a stoop, and a hopper 4 storing seeds S is provided on the traveling machine body. A discharge opening 6a is provided to discharge the seeds S on the earth raised at the forward end of the earth screening conveyer 2. When the hoe 3 is buried in the ridge ground G and the traveling machine is travelled, the field crop P in the earth is picked up while some of the ridge ground G is raised to the forward end of the earth screening conveyer 2 by the hoe 3. The dug out field crop P is picked up by the earth screening conveyer 2, and adhering earth is shaped off by the earth screening conveyer 2. Simultaneously with digging out and picking up, the seeds S in the hopper 4 is discharged on the raised earth, and the seeds S and the earth are mixed by the earth screening conveyer 2 and also fallen in the ridge ground G.COPYRIGHT: (C)2013,JPO&INPIT【課題】 馬鈴薯等の農作物の掘り取りとカバークロップの播種を同時に行う。【解決手段】 前端に鍬3を備えた土篩コンベヤ2を走行機体に前屈みに取り付け、種子Sを貯溜したホッパー4を走行機体に設け、その吐出口6aを土篩コンベヤ2の先端部で隆起した土上に種子Sが吐出されるように設ける。鍬3を畦土Gに埋入して走行機体を走行させると、鍬3で畦土Gの一部が土篩コンベヤ2の先端部に隆起しながら土中の農作物Pが掘り取られる。掘り取られた農作物Pは土篩コンベヤ2に拾い上げられ、付着している土は土篩コンベヤ2で振い落とされる。その掘り取りと並行して、ホッパー4内の種子Sが隆起した土上に吐出され、その種子Sと土が土篩コンベヤ2で混和しながら畦土Gに落下する。【選択図】 図3
