working farm
noun1
A farm whose agricultural land and buildings are in active use for crop production and/or the raising of livestock.
- 2007, Louis Porter, "Farm deal sours over money," The Barre Montpelier Times Argus (Vermont), 4 Oct., Even though the land was being farmed and was protected from development, Pelham says it was at risk of being sold to someone who wasn't going to keep it as a working farm.