Answer:
A nut cracker up in a tree.
A harvest sown and reaped on the same day In an unplowed field, Which increases without growing, Remains whole though it is eaten Within and without, Is useless and yet The staple of nations.
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
You can tumble in it, roll in it, burn it, animal eat it. Used to cover floors, still used beyond stall doors. Freshens whatever it is placed on. Absorbs whatever is poured into it.
What has thirteen hearts But no body or soul?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.