FIELD: agriculture.
SUBSTANCE: invention relates to agricultural machine building, in particular, to soil treatment tools. Disc for berm formation is made with possibility of soil amount reducing, which accumulates on disc inner surface, as disc pushes soil out to form berm. Disc has concave body with external radial edge, forming inner concave surface and outer convex surface, as well as central hole. Through body between inner and outer surfaces multiple holes are passing, radially spaced from body radial outer end next to central hole.
EFFECT: such design solution provides for reduction of tool traction resistance.
18 cl, 11 dwg
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