The present invention relates to a motorized weed chopper for soil preparation or weed removal having a mass M kg, said motorized weed chopper comprising a shaft comprising a first and a second end portion, wherein said first end portion comprises a handle and said second end portion comprises a blade, wherein said motorized weed chopper further comprises a drive unit arranged to oscillate said blade in a geometric plane, wherein said blade has a surface area A cm2 in said geometric plane and wherein the ratio of said surface area A cm2 to said mass M kg is 18:1 - 34:1, preferably 22:1 - 30:1, and most preferably 26:1.
