Metering assembly for an air seeder

A metering assembly for use with an air seeding system for delivering one or more particulate materials to an air seeding apparatus, the air seeding system comprising a product tank, configured to hold a particulate material and having an outlet, the metering assembly comprising:

• at least one metering device, each metering device having:
• a housing,
• an inlet positioned in the housing to receive particulate material from the outlet of the product tank,
• a first loading zone and a second loading zone, and
• a rotatable flow controller provided at or near the inlet and operative to route particulate material that has entered the metering device through the inlet to either the first loading zone or the second loading zone, whereby when the flow controller is rotating in a first direction, particulate material is routed only to the first loading zone and when the flow controller is rotating in a second direction, particulate material is routed only to the second loading zone;
• a first air stream passage in communication with the first loading zone so that when particulate material is routed to the first loading zone, the particulate material enters the first air stream passage which then feeds the particulate material to a first soil engaging member;
• and
• a second air stream passage in communication with the second loading zone so that when particulate material is routed to the second loading zone, the particulate material enters the second air stream passage which then feeds the particulate material to a second soil engaging member.