Agriculture Business experts apply a wide range of knowledge of markets, products and laws to local, regional, national and international agricultural commerce. Producing and marketing food and fiber products is a vital and important industry in the United States. The United States is the largest producer and exporter of agricultural products in the world. The agri-business sector employs a large percentage of the U.S. labor force. These individuals assist the producer of food and fiber products in input procurement, marketing, financing, and management.