Tractor

Look at all the amazing machines you'll find on a farm. Take a close look at a tractor and its various attachments and learn how a crop is planted and cared for.

Looking at a variety of machines with a wide range of uses, the Machines at Work series explains how vehicles help people on farms, construction sites, and other busy places. Each of the books answers questions with bright, interesting photographs of machines in different situations to explain how they work and what they do. Compl...