PROBLEM TO BE SOLVED: To maintain an interval between crops seeded in a field at a desired interval and increase a speed of seeding the crops.SOLUTION: Crops S are excessively supplied onto a V-shaped conveyance part 131 and a round belt conveyance part 140. The V-shaped conveyance part 131 holds the crops S so as to form a crop row Ls and conveys the crops S along an A2 direction. The round belt conveyance part 140 supports together with the V-shaped conveyance part 131 excessive crops other than the crops S forming the crop row Ls so as to overlap the crops S forming the crop row Ls at positions along the A2 direction. Guides 156L, 156R guide the excessive crops S from the V-shaped conveyance part 131 and the round belt conveyance part 140 onto a return flow conveyance part 150.SELECTED DRAWING: Figure 5
