Adjustable width row unit for a planter

An agricultural planting apparatus, comprising:

• a chassis;
• a row unit carried by said chassis and defining a width, said row unit including:
• a unit body carried by said chassis;
• a metering device carried by said unit body;
• at least one furrowing disc carried by said unit body;
• at least one closing disc carried by said unit body and positioned behind said at least one furrowing disc in a direction of travel;
• a restraining member carried by said unit body;
• and
• a pressing wheel carried by said unit body, pivotally movable about an axis of rotation relative to said unit body, positionable behind said at least one closing disc in the direction of travel, and reversibly connectable to said restraining member, said pressing wheel having a constrained pivoting configuration when connected to said restraining member and a freely pivoting configuration when disconnected from said restraining member, said pressing wheel resisting pivoting in said restrained pivoting configuration and being configured to reduce said width of said row unit when pivoted in an upward direction about said axis of rotation in said freely pivoting configuration.