Machines for transplanting of seedlings

The manually operated drum seeder is used for some wet seeding in eastern Asia. The drum seeder operates best on a seedbed that is very level, smooth and wet. The drum seeder is very heavy to pull and can leave gaps and multiple seedlings in the planted row. Uneven seeding occurs: many seeds are dropped when the operator stops, and then no seeds are dropped until the seeder has moved forward for a small distance. Uneven seeding leads to a very uneven plant stand and follow up transplanting may be required.