PROBLEM TO BE SOLVED: To provide an apparatus for digging up and retrieving unwanted substances, despite being wild yams and/or tubers, existing in farms deep and shallow strata, and also soil lumps as unwanted substances dug up, at the same time as with wild yams and/or tubers that exist in the deep strata.SOLUTION: The apparatus works in such a way that the unwanted substances and soils/sands which are not the unwanted substances are separated during conveying of soils/sands that includes those substance that are not the unwanted substances dug up, and the soil/sand is returned to the farm C and only those that are not unwanted substances are accommodated in a container 4.COPYRIGHT: (C)2008,JPO&INPIT【課題】 圃場の深い層及び浅い層に存在する不要物である野良芋や塊茎にかかわらず、これを掘上げて回収すると共に、深い層に存在する野良芋や塊茎と同時に掘り上げられる不要物である土塊も回収する。【解決手段】 掘り取られた不要物を含む土砂の運搬中に、不要物と不要物でない土砂を分離するとともに、不要物でない土砂を圃場C上に戻し、不要物のみを収容部4へ収容する。【選択図】 図1
