Farm units are a way of measuring the amount of produce or livestock on a farm. BUSHELS, with seven letters, is a unit of volume used to measure dry goods such as grain, fruit, and vegetables. ACRES, with five letters, is a unit of area used to measure land. PECKS, with five letters, is a unit of volume used to measure dry goods such as grain, fruit, and vegetables. Silos, with five letters, are large structures used to store grain, seed, or silage. Sties, with five letters, are small enclosures used to keep pigs.