Residents (farmers in particular).
But according to my observations that absolutely all residents do not collect from the floor food, wheat, seedlings to sow plants on the beds.

Checked by me in creative, I created a new farmer and tried to give him the seeds of wheat, potatoes and carrots, none of this he collected from the floor, even fertilizer does not want to take, most likely this is a bug, since all 8 slots are free