Topic From the fact that it is not any which prevent the damage drying and the weed etc of the root which existing is done due to invasion and the like, it has become the catching increasing of expense and the like.Then, being light conveyance easy, be able to install this device, easily, it prevents the damage and the like of the plantation tree, working capacity rises, it designates that such as the effective weed invasion where improvement of life arrival factor is assured the prevention board is offered as topic.SolutionsThis device designates the doughnut board of the disc-like of the natural vegetable fiber make which existing is done as base, it is something where size of base from the outer part circular arc belt top of base applying on the center diameter approximately 40cm the diameter of the center as approximately 7cm, inserts cutting into the width, approximately 2cm to become taking in and out in order possible uses, in basis of the plantation tree. Choice figure Drawing 1
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