An agricultural implement including a toolbar, a plurality of row unitsconnectedto the toolbar, and a pneumatic seeding system. The pneumatic seeding systemincludes at leastone storage tank configured for storing the particulate matter, a plurality offluid lines fluidlyinterconnecting the at least one storage tank with each row unit of theplurality of row units, afan fluidly connected to the at least one storage tank and to the plurality offluid lines, and atleast one pinch valve fluidly coupled to at least one fluid line of theplurality of fluid lines foradjustably balancing a respective airstream within the at least one fluid lineof the plurality offluid lines.
