The present invention is directed to a hopper for a seed metering system that has a series of individualized and independently controlled metering units. The hopper has a plurality of discharge openings that can be selectively opened and closed to expose an opening to a respective one of the plurality of metering units. Each seed metering unit is selectively driven by a common drive member, such as a drive shaft. When a seed metering unit is engaged with the drive member, the unit will meter granular material. On the other hand, when the seed metering unit is not engaged with the drive member, the metering unit will not meter granular material. Hence, the present invention provides a seed metering apparatus that provides effective sectional control.