Agricultural, animal husbandry and horticultural services on a fee or contract basis, such as harvesting, baling, threshing, husking and shelling; preparing of tobacco for auctioning; animal shearing; pest destroying and spraying; seeding and spraying by aircraft; pruning; picking of fruits and vegetables and. packing on the farm and on the account of the producers elsewhere; and the operation of irrigation systems. The provision on a fee or contract basis, of agricultural equipment along with the services of drivers and other attendants of the equipment, is covered in this group, but the letting of agricultural equipment solely, is classified in major group 833 (Machinery rental and leasing), Veterinary services on a fee or contract basis are classified in group 9332 (Veterinary services); establishments primarily engaged in the transportation of farm products are classified in the appropriate group of division 71 (Transport and storage); and the operators of horse and dog racing stables are classified in group 9490 (Amusement and recreation services, not elsewhere classified).