Agricultural use including the keeping of livestock, animal and/or poultry, customarily incidental to such use or nursery; provided, however, that the following specialized uses will be permitted only when authorized as a special exception: animal farms, riding academy, mushroom house, commercial greenhouse, permanent roadside stand for sale of farm products, and provided any such use is in compliance with state statutes and Township ordinances, and provided, further, that no piggery shall be permitted. The minimum lot area for agricultural use is 10 acres. A veterinary office is permitted by special exception.