This industry comprises establishments primarily engaged in the merchant wholesale distribution of farm supplies, such as animal feeds, fertilizers, agricultural chemicals, pesticides, plant seeds, and plant bulbs. Cross-References. Establishments primarily engaged in-- ? Merchant wholesale distribution of pet food--are classified in Industry 424490, Other Grocery and Related Products Merchant Wholesalers; ? Merchant wholesale distribution of grains--are classified in Industry 424510, Grain and Field Bean Merchant Wholesalers; ? Merchant wholesale distribution of pet supplies--are classified in Industry 424990, Other Miscellaneous Nondurable Goods Merchant Wholesalers; and ? Merchant wholesale distribution of nursery stock (except seeds and plant bulbs)--are classified in Industry 424930, Flower, Nursery Stock, and Florists' Supplies Merchant Wholesalers.