An opener unit having a pair of single disc openers mounted upon a parallel linkagewhich may be mounted onto a tool bar or drawbar is disclosed and claimed. The pairof single opener discs may be used for controlled creation of a pair of furrowsto which seed, fertilizer or other soil amendments may be delivered. The openerunit may be mounted in combination with a row clearing or cleaning unit. The openerunit may also be mounted in combination with an auxiliary depth tire or a ski, andor a furrow closing means such as a wheel, a chain or a strap.
