query: What is Tennessee main export?
passage: Tennessee
Tennessee's major industries include agriculture, manufacturing, and tourism. Poultry, soybeans, and cattle are the state's primary agricultural products,[10] and major manufacturing exports include chemicals, transportation equipment, and electrical equipment.[11] The Great Smoky Mountains National Park, the nation's most visited national park, is headquartered in the eastern part of the state, and a section of the Appalachian Trail roughly follows the Tennessee-North Carolina border.[12] Other major tourist attractions include the Tennessee Aquarium in Chattanooga; Dollywood in Pigeon Forge; Ripley's Aquarium of the Smokies and Ober Gatlinburg in Gatlinburg; the Parthenon, the Country Music Hall of Fame and Museum, and Ryman Auditorium in Nashville; the Jack Daniel's Distillery in Lynchburg; Elvis Presley's Graceland residence and tomb, the Memphis Zoo, the National Civil Rights Museum in Memphis; and Bristol Motor Speedway in Bristol.
passage: Knoxville, Tennessee
Most commercial shipping on the Tennessee River is provided by barges, which deliver on average a half-million tons of cargo to Knoxville per year, mostly asphalt, road salt, and steel and coke. Burkhart Enterprises operates the city's most active public barge terminal at its Forks of the River facility, handling approximately 350,000 tons of barge cargo per year. Knoxville Barge and Chattanooga-based Serodino, Inc., provide barge shipping services to and from the city.