a tubular supporting member for varying the angle of the supporting member relative to the horizontal for controlling the depth of penetration of the two and a tubular arm telescopically mounted on the tubular supporting member and extendible and retractable relative thereto and a single spring based mechanism mounted within the tubular supporting member and connected to the extendible and retractable arm moving the arm relative to the supporting member and a supporting housing mounted for pivotal movement for transverse horizontal pivot on the end of said arm and a suspension system single spring loaded cultivating tool mounted on said supporting housing and extending downwardly there from into engagement with the surface and a single spring based mounted on said housing and operatively connected to the suspension system single spring loaded tool for rotating the same as it moves over the surface.
