» This article describes the farm machinery. For the municipality in Aurora, Philippines, see Baler, Aurora. A baler is a piece of farm machinery used to compress a cut and raked crop (such as hay, silage or straw) into compact bales that are easy to handle, transport and store. Several different types of balers are commonly used, each producing a different type of bales – rectangular or cylindrical, of various sizes, bound with twine, wire or netting. Balers are also used in material rec… (More on Baler)