fallow, unploughed, untilled, unbroken, kept.
No farmer goes out and plants grain on the unplowed field.
He bumped over rutted paths through rough, plowed and unplowed fields several miles before he finally arrived.
The outlying, unplowed land also bore, mile upon mile, marks of the ravages of an army of badgers; but the north end of the wheat- field was the concentration camp.