Abstract: A wheeled trailer frame is provided including front and rear ends and equipped with a forwardly projecting tongue for releasable coupling to and support from a draft vehicle. A rearwardly and upwardly inclined elongated guide structure is supported from the frame and an upstanding forwardly facing splitting wedge is supported from the rear portion of the guide structure. A pressure member is supported on the guide structure forward of the wedge for guided movement along the guide structure toward and away from the wedge and power structure is operatively connected between the frame and the pressure member for moving the latter along the guide structure toward the wedge. The guide structure has elongated trough structure supported relative thereto defining a trough extending along and having the guide structure as its bottom. The trough structure extends both to the front and rear of the wedge and includes a transverse portion rearward of the guide structure forming a continuation thereof.