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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 outIt 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 outIt 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