It drives through dirt and mud. It pulls heavy machines through fields. This farm tractor is on the move! What jobs do tractors do? And how do farmers drive tractors? Read this book to find out! Learn all about mighty machines in the Vroom-Vroom series―part of the Lightning Bolt Books™ collection. With high-energy designs, exciting photos, and fun text, Lightning Bolt Books™ bring nonfiction topics to life!