Row crop planter convertible between narrow and wide row spacing

Abstract From the Canadian patent

of the Invention, An agricultural planter for row crops has conventional pull-type row units mounted to a frame at a relatively wide spacing for planting a crop such as corn. Push-type row units, each capable of planting two rows at a spacing which is one-third of the wide spacing are mounted to be pushed by the frame so that when both front and rear row units are used, a much narrower row spacing for beans or wheat, for example, can be achieved. The furrow openers on the push-type units are staggered fore-and-aft to avoid plugging of adjacent gauge wheels with field trash or clods of soil.