(under subclass 681) Apparatus in which a single earth working element is adapted to move soil transversely from opposite directions to form a hill or ridge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
176, for a furrowing or ridging implement followed by a furrow or ridge roller.
686, for separate tools of the right and left hand type.
SEE OR SEARCH CLASS
111, Planting, appropriate subclasses for ridgers combined with planting means.
