US Patent 10045478 Metering system for an agricultural system

A metering system for an agricultural system includes a singulator. The singulator includes a hopper configured to provide a flow of plantlet casings from a storage tank of the agricultural system, a pair of counter-rotating rods configured to receive the plantlet casings from the hopper at a feed rate, where the pair of counter-rotating rods are spaced apart from one another to form a gap, and where the gap is configured to direct the plantlet casings from a first end of the pair of counter-rotating rods to a second end of the pair of counter-rotating rods, and a drive assembly configured to drive rotation of the pair of counter-rotating rods.