Few farm machines have met with such rapid acceptance as the field baler. Baling machines have been in existence for many years, but were usually considered as a necessary part of the equipment needed to process hay for shipment. It was not likely that the individual farmer thought baling a necessary step in preparing hay for farm consumption. Today, the field baler, with pick-up attachments and self-tying mechanisms, has became a farm tool to process the hay crop to be feel on the farm. The hay baler compresses the product and facilitates its transportation. Loose hay weighs from 4 to 5 pounds per cubic foot, but when baled weighs from 12 to 14 pounds per cubic foot. The held baler also is used in a system of farming operations whereby the...