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Large square bales, which can weigh up to 1,000 kilograms (2,200 lb), can be stacked and easily transported on trucks. Large round bales, which typically weigh 300 to 400 kilograms (660–880 lb), are more moisture-resistant and pack the hay more densely (especially at the center). Round bales are quickly fed with the use of mechanized equipment.
A large round bale can be directly used for feeding animals by placing it in a feeding area, tipping it over, removing the bale wrap, and placing a protective ring (a ring feeder) around the outside so that animals will not walk on hay that has been peeled off the outer perimeter of the bale. The round baler's rotational forming and compaction ...
Small square bales weigh from 25 to 30 kg (55 to 66 lb) depending on moisture, and can be easily hand separated into "flakes". Cattle ranches use large round bales, typically 1.4 to 1.8 m ( 4 + 1 ⁄ 2 to 6 ft) in diameter and weighing from 500 to 1,000 kg (1,100 to 2,200 lb).
The presser closes the bale with four internal and five external metal bale fasteners, before weighing the bale, if the press does not have an inbuilt scale. Bales should weigh between 110 kg (243 lb) and 204 kg (450 lb), unless the wool is under 18.6 microns , in which case they may be a minimum gross weight of 90 kg (198 lb).
Portable Pow-R Drive, a self-propelled irrigation system, hay conditioner and cutter are introduced in the 1950s. Vermeer invents the first machine to dig, transport and replace large trees in the 1960s. The first larger round hay baler was invented by Gary Vermeer in 1971. Allis Chalmers first introduced the small round rotobaler in 1947.
Several different types of balers are commonly used, each producing a different type of bales – rectangular or cylindrical (round), of various sizes, bound with twine, netting, or wire. The round hay baler was invented by Ummo F. Luebben of Sutton, Nebraska, which he conceived with his brother Melchior in 1903, and then patented in 1910.
Fodder includes hay, straw, silage, compressed and pelleted feeds, oils and mixed rations, and sprouted grains and legumes (such as bean sprouts, fresh malt, or spent malt). Most animal feed is from plants, but some manufacturers add ingredients to processed feeds that are of animal origin.
Straw is usually gathered and stored in a straw bale, which is a bale, or bundle, of straw tightly bound with twine, wire, or string. Straw bales may be square, rectangular, star shaped or round, and can be very large, depending on the type of baler used.