| 摘要 |
Device making it possible to ensure the aeration of the roots of trees as well as the supply of fertiliser, the device having the form of a tubular element 1 capable of being inserted into the ground around the tree. This tubular element 1 comprises, at one of its ends, a plate 2 which projects laterally and in the centre of which small perforations 5 are made. <IMAGE>
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