Amazon.com description: Product Description: A baler is an important piece of farm machinery that transforms cut crops, such as hay, into compact bales that are easy to transport and store. Readers who have seen a picturesque field dotted with yellow bales of hay will love exploring balers and how different shapes of bales meet the needs of a farm. Bales and the machines that make them are shown in bright, colorful photographs. The straightforward text explains the parts of the machines, how the machines work, and the role they play in a working farm.