Oats redirects here. It may mean either the common cereal oat discussed here, or any cultivated or wild species of the genus Avena.

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Oat
Oat plants with inflorescences
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
(unranked):	Commelinids
Order:	Poales
Family:	Poaceae
Genus:	Avena
Species:	A. sativa
Binomial name
Avena sativa L. (1753)

The common oat (Avena sativa) is a species of cereal grain grown for its seed, which is known by the same name (usually in the plural, unlike other grains). While oats are suitable for human consumption as oatmeal and rolled oats, one of the most common uses is as livestock feed. Oats make up a part of the daily diet of horses, about 20% of daily intake or smaller, and are regularly fed to cattle as well. Oats are also used in some brands of dog food and chicken feed. Oat seeds are commonly marketed as cat grass to cat enthusiasts, since cats readily harvest and eat tender young oat, wheat, and some other grass sprouts.^[1]

Origin[link]

The wild ancestor of Avena sativa and the closely related minor crop, A. byzantina, is the hexaploid wild oat A. sterilis. Genetic evidence shows the ancestral forms of A. sterilis grew in the Fertile Crescent of the Near East. Domesticated oats appear relatively late, and far from the Near East, in Bronze Age Europe. Oats, like rye, are usually considered a secondary crop, i.e., derived from a weed of the primary cereal domesticates wheat and barley. As these cereals spread westwards into cooler, wetter areas, this may have favored the oat weed component, leading to its eventual domestication.^[2]

Cultivation[link]

Top Ten Oats Producers—2005 (million tonne)
Russia	5.1
Canada	3.3
United States	1.7
Poland	1.3
Finland	1.2
Australia	1.1
Germany	1.0
Belarus	0.8
China	0.8
Ukraine	0.8
World Total	24.6
Source: FAO
EU figures from 2007 include Poland, Finland and Germany.

Oats are grown throughout the temperate zones. They have a lower summer heat requirement and greater tolerance of rain than other cereals, such as wheat, rye or barley, so are particularly important in areas with cool, wet summers, such as Northwest Europe; they are even being grown successfully in Iceland. Oats are an annual plant, and can be planted either in autumn (for late summer harvest) or in the spring (for early autumn harvest).

Oat output in 2005

Worldwide oat production

Uses[link]

Closeup of oat florets (small flowers)

Oats have numerous uses in food; most commonly, they are rolled or crushed into oatmeal, or ground into fine oat flour. Oatmeal is chiefly eaten as porridge, but may also be used in a variety of baked goods, such as oatcakes, oatmeal cookies, and oat bread. Oats are also an ingredient in many cold cereals, in particular muesli and granola. Oats may also be consumed raw, and cookies with raw oats are becoming popular.

Oats are also occasionally used in several different drinks. In Britain, they are used for brewing beer. Oatmeal stout is one variety brewed using a percentage of oats for the wort. The more rarely used oat malt is produced by the Thomas Fawcett & Sons Maltings, and was used in the Maclay Oat Malt Stout before Maclays Brewery ceased independent brewing operations. A cold, sweet drink called Avena made of ground oats and milk is a popular refreshment throughout Latin America. Oatmeal caudle, made of ale and oatmeal with spices, was a traditional British drink and a favourite of Oliver Cromwell.^[3][4]

Historical attitudes towards oats have varied. Oat bread was first manufactured in Britain, where the first oat bread factory was established in 1899. In Scotland, they were, and still are, held in high esteem, as a mainstay of the national diet.

In Scotland, a dish called sowans was made by soaking the husks from oats for a week, so that the fine, floury part of the meal remained as sediment to be strained off, boiled and eaten.^[5] Oats are also widely used there as a thickener in soups, as barley or rice might be used in other countries.

Oats are also commonly used as feed for horses when extra carbohydrates, and the subsequent boost in energy, are required. The oat hull must be crushed ("rolled" or "crimped") for the horse to digest the grain, and may be given alone or as part of a blended food pellet. Cattle are also fed oats, either whole, or ground into a coarse flour using a roller mill, burr mill, or hammer mill.

Oat straw is prized by cattle and horse producers as bedding, due to its soft, relatively dust-free, and absorbent nature. The straw can also be used for making corn dollies. Tied in a muslin bag, oat straw was used to soften bath water.

Oat extract can also be used to soothe skin conditions. It is the principal ingredient for the Aveeno line of products.^[6]

Oat grass has been used traditionally for medicinal purposes, including to help balance the menstrual cycle, treat dysmenorrhoea, and for osteoporosis and urinary tract infections.^[7]

Health[link]

Oat grains in their husks

Oats are generally considered "healthful", or a health food, being touted commercially as nutritious. The discovery of the healthy cholesterol-lowering properties has led to wider appreciation of oats as human food.

Soluble fibre[link]

Oat bran is the outer casing of the oat. Its consumption is believed to lower LDL ("bad") cholesterol, and possibly to reduce the risk of heart disease.

Oats contain more soluble fibre than any other grain, resulting in slower digestion and an extended sensation of fullness.^{[citation needed]} One type of soluble fibre, beta-glucans, has proven to help lower cholesterol.

After reports of research finding that dietary oats can help lower cholesterol,^[8] an "oat bran craze" swept the U.S. in the late 1980s, peaking in 1989, when potato chips with added oat bran were marketed. The food fad was short-lived and faded by the early 1990s. The popularity of oatmeal and other oat products again increased after a January 1998 decision by the Food and Drug Administration (FDA), when it issued a final rule that allows food companies to make a health claim on labels of foods that contain soluble fibre from whole oats (oat bran, oat flour and rolled oats), noting that 3.00 grams of soluble fibre daily from these foods may reduce the risk of heart disease. To qualify for the health claim, the whole oat-containing food must provide at least 0.75 grams of soluble fibre per serving. A class of polysaccharides known as beta-D-glucans comprise the soluble fibre in whole oats.

Beta-D-glucans, usually referred to as beta-glucans, comprise a class of indigestible polysaccharides widely found in nature in sources such as grains, barley, yeast, bacteria, algae and mushrooms. In oats, barley and other cereal grains, they are located primarily in the endosperm cell wall.

Oat beta-glucan is a soluble fibre. It is a viscous polysaccharide made up of units of the monosaccharide D-glucose. Oat beta-glucan is composed of mixed-linkage polysaccharides. This means the bonds between the D-glucose or D-glucopyranosyl units are either beta-1, 3 linkages or beta-1, 4 linkages. This type of beta-glucan is also referred to as a mixed-linkage (1→3), (1→4)-beta-D-glucan. The (1→3)-linkages break up the uniform structure of the beta-D-glucan molecule and make it soluble and flexible. In comparison, the indigestible polysaccharide cellulose is also a beta-glucan, but is not soluble. The reason it is insoluble is that cellulose consists only of (1→4)-beta-D-linkages. The percentages of beta-glucan in the various whole oat products are: oat bran, greater than 5.5% and up to 23.0%; rolled oats, about 4%; and whole oat flour about 4%.

Oats, after corn (maize), have the highest lipid content of any cereal, e.g., greater than 10% for oats and as high as 17% for some maize cultivars compared to about two to three per cent for wheat and most other cereals. The polar lipid content of oats (about 8–17% glycolipid and 10–20% phospholipid or a total of about 33%) is greater than that of other cereals, since much of the lipid fraction is contained within the endosperm.

Protein[link]

Oats are the only cereal containing a globulin or legume-like protein, avenalin, as the major (80%) storage protein.^[9] Globulins are characterised by solubility in dilute saline. The more typical cereal proteins, such as gluten and zein, are prolamines (prolamins). The minor protein of oat is a prolamine, avenin.

Oat protein is nearly equivalent in quality to soy protein, which World Health Organization research has shown is equal to meat, milk, and egg protein.^[10] The protein content of the hull-less oat kernel (groat) ranges from 12 to 24%, the highest among cereals.

Coeliac disease[link]

Coeliac disease (celiac disease) is often associated with the ingestion of wheat, or more specifically, a group of proteins labelled prolamines, or more commonly, gluten. Oats lack many of the prolamines found in wheat; however, oats do contain avenin.^[11] Avenin is a prolamine that is toxic to the intestinal mucosa of avenin-sensitive individuals, and can trigger a reaction in these coeliacs.^[12]

The most recent research indicates that some cultivars of oat can be a safe part of a gluten-free diet, because different varieties of oat have different levels of toxicity.^[13] Although oats do contain avenin, there are several studies suggesting that this may not be problematic for all coeliacs. The first such study was published in 1995.^[14] A follow-up study indicated it is safe to use oats even in a longer period.^[15]

Additionally, oats are frequently processed near wheat, barley and other grains, such that they become contaminated with other glutens. Because of this, the FAO's Codex Alimentarius Commission officially lists them as a gluten-containing crop. Oats from Ireland and Scotland, where less wheat is grown, are less likely to be contaminated in this way.^{[citation needed]} Oats are part of a gluten-free diet in countries like Finland and Sweden. Suppliers in both those countries offer "pure oat" products.

Agronomy[link]

Oats in Saskatchewan near harvest time

Oats are sown in the spring or early summer, as soon as the soil can be worked. An early start is crucial to good yields, as oats go dormant in summer heat. In warmer areas, oats are sown in late summer or early fall. Oats are cold-tolerant and are unaffected by late frosts or snow.

Seeding rates[link]

Typically, about 125 to 175 kg/ha (between 2.75 and 3.25 bushels per acre) are sown, either broadcast, drilled, or planted using an air seeder. Lower rates are used when underseeding with a legume. Somewhat higher rates can be used on the best soils, or where there are problems with weeds. Excessive sowing rates lead to problems with lodging, and may reduce yields.

Winter oats may be grown as an off-season groundcover and ploughed under in the spring as a green fertilizer, grazed as winter forage, or harvested in early summer.

Fertilizer requirements[link]

Oats remove substantial amounts of nitrogen from the soil. They also remove phosphorus in the form of P₂O₅ at the rate of 0.25 pound per bushel per acre (1 bushel = 38 pounds at 12% moisture);^{[citation needed]} Phosphate is thus applied at a rate of 30 to 40 kg/ha, or 30 to 40 lb/acre. Oats remove potash (K₂O) at a rate of 0.19 pound per bushel per acre, which causes it to use 15–30 kg/ha, or 13–27 lb/acre. Usually, 50–100 kg/ha (45–90 pounds per acre) of nitrogen in the form of urea or anhydrous ammonia is sufficient, as oats use about one pound per bushel per acre. A sufficient amount of nitrogen is particularly important for plant height, and hence, straw quality and yield. When the prior-year crop was a legume, or where ample manure is applied, nitrogen rates can be reduced somewhat.

Weed control[link]

The vigorous growth of oats tends to choke out most weeds. A few tall broadleaf weeds, such as ragweed, goosegrass, wild mustard, and buttonweed (velvetleaf), occasionally create a problem, as they complicate harvest and reduce yields. These can be controlled with a modest application of a broadleaf herbicide, such as 2,4-D, while the weeds are still small.

Pests and diseases[link]

Oats are relatively free from diseases and pests with the exception being leaf diseases, such as leaf rust and stem rust. A few lepidopteran caterpillars feed on the plants—e.g. rustic shoulder-knot and setaceous Hebrew character moths, but these rarely become a major pest. See also List of oats diseases.

Harvesting[link]

Harvesting of oats in Jølster, Norway ca. 1890.
(Photo: Axel Lindahl/Norwegian Museum of Cultural History)

Modern harvest technique is a matter of available equipment, local tradition, and priorities. Farmers seeking the highest yield from their crop time their harvest so the kernels have reached 35% moisture, or when the greenest kernels are just turning cream-colour. They then harvest by swathing, cutting the plants at about 10 cm (4 inches) above ground, and putting the swathed plants into windrows with the grain all oriented the same way. They leave the windrows to dry in the sun for several days before combining them using a pickup header. Finally, they bale the straw.

Oats can also be left standing until completely ripe and then combined with a grain head. This causes greater field losses as the grain falls from the heads, and to harvesting losses, as the grain is threshed out by the reel. Without a draper head, there is also more age to the straw, since it is not properly oriented as it enters the combine's throat. Overall yield loss is 10–15% compared to proper swathing.

Historical harvest methods involved cutting with a scythe or sickle, and threshing under the feet of cattle. Late 19th and early 20th century harvesting was performed using a binder. Oats were gathered into shocks and then collected and run through a stationary threshing machine.

Storage[link]

After combining, the oats are transported to the farmyard using a grain truck, semi, or road train, where they are augered or conveyed into a bin for storage. Sometimes, when there is not enough bin space, they are augered into portable grain rings, or piled on the ground. Oats can be safely stored at 12% moisture; at higher moisture levels, they must be aerated, or dried.

Yield and quality[link]

In the United States, No.1 oats weigh 42 pounds per US bushel (541 kg/m³); No.3 oats must weigh at least 38 lb/US bu (489 kg/m³). If over 36 lb/US bu (463 kg/m³), they are graded as No.4, and oats under 36 lb/US bu (463 kg/m³) are graded as "light weight". In Canada, No.1 oats weigh 42.64 lb/US bu (549 kg/m³); No.2 oats must weigh 40.18 lb/US bu (517 kg/m³); No.3 oats must weigh at least 38.54 lb/US bu (496 kg/m³) and if oats are lighter than 36.08 lb/US bu (464 kg/m³) they do not make No.4 oats and have no grade.^[16]

Note, however, that oats are bought and sold, and yields are figured, on the basis of a bushel equal to 32 pounds (14.5 kg or 412 kg/m³) in the United States and a bushel equal to 34 pounds (15.4 kg or 438 kg/m³) in Canada. Yields range from 60 to 80 US bushels per acre (5.2–7.0 m³/ha) on marginal land, to 100 to 150 US bushels per acre (8.7–13 m³/ha) on high-producing land. The average production is 100 bushels per acre, or 3.5 tonnes per hectare.

Straw yields are variable, ranging from one to three tonnes per hectare, mainly due to available nutrients, and the variety used (some are short-strawed, meant specifically for straight combining).

Processing[link]

Porridge oats before cooking

Oats processing is a relatively simple process:

Cleaning and sizing[link]

Upon delivery to the milling plant, chaff, rocks, other grains, and other foreign material are removed from the oats.

Dehulling[link]

Centripetal acceleration is used to separate the outer hull from the inner oat groat. Oats are fed by gravity onto the centre of a horizontally spinning stone, which accelerates them towards the outer ring. Groats and hulls are separated on impact with this ring. The lighter oat hulls are then aspirated away, while the denser oat groats are taken to the next step of processing. Oat hulls can be used as feed, processed further into insoluble oat fibre, or used as a biomass fuel.

Kilning[link]

The unsized oat groats pass through a heat and moisture treatment to balance moisture, but mainly to stabilize them. Oat groats are high in fat (lipids), and once removed from their protective hulls and exposed to air, enzymatic (lipase) activity begins to break down the fat into free fatty acids, ultimately causing an off-flavour or rancidity. Oats begin to show signs of enzymatic rancidity within four days of being dehulled if not stabilized. This process is primarily done in food grade plants, not in feed grade plants. Groats are not considered raw if they have gone through this process; the heat disrupts the germ, and they cannot sprout.

Sizing of groats[link]

Many whole oat groats break during the de-hulling process, leaving the following types of groats to be sized and separated for further processing: whole oat groats, coarse steel cut groats, steel cut groats, and fine steel cut groats. Groats are sized and separated using screens, shakers and indent screens. After the whole oat groats are separated, the remaining broken groats get sized again into the 3 groups (coarse, regular, fine), and then stored. "Steel cut" refers to all sized or cut groats. When there are not enough broken groats to size for further processing, whole oat groats are sent to a cutting unit with steel blades that evenly cut groats into the three sizes mentioned above.

Final processing[link]

Three methods are used to make the finished product:

Flaking[link]

This process uses two large smooth or corrugated rolls spinning at the same speed in opposite directions at a controlled distance. Oat flakes, also known as rolled oats, have many different sizes, thicknesses and other characteristics depending on the size of oat groats passed between the rolls. Typically, the three sizes of steel cut oats are used to make instant, baby and quick rolled oats, whereas whole oat groats are used to make regular, medium and thick rolled oats. Oat flakes range from a thickness of 0.36 mm to 1.00 mm.

Oat bran milling[link]

This process takes the oat groats through several roll stands to flatten and separate the bran from the flour (endosperm). The two separate products (flour and bran) get sifted through a gyrating sifter screen to further separate them. The final products are oat bran and debranned oat flour.

Whole flour milling[link]

This process takes oat groats straight to a grinding unit (stone or hammer mill) and then over sifter screens to separate the coarse flour and final whole oat flour. The coarser flour is sent back to the grinding unit until it is ground fine enough to be whole oat flour. This method is used often in India and other countries.

Naming[link]

In Scottish English, oats may be referred to as corn.^[17]

Oats futures[link]

Oats futures are traded on the Chicago Board of Trade, and have delivery dates in March (H), May (K), July (N), September (U) and December (Z).^[18]

See also[link]

• Export hay
• Muesli
• Oat milk
• Oatmeal
• Oatcake
• Porridge
• Mornflake Oats
• Quaker Oats Company
• Rolled oats
• Steel-cut oats

References[link]

External links[link]

Wikimedia Commons has media related to: Avena sativa

• How Oats Are Processed
• Oat Bran foundation

Gregory and the Hawk
Meredith Godreau in summer 2007
Background information
Origin	New York, USA
Genres	Acoustic, indie pop, indie folk[1]
Years active	2003–present
Labels	FatCat Records, Pearly Gates!
Website	http://www.gregoryandthehawk.com/

Meredith Godreau is an American singer-songwriter performing under the pseudonym Gregory and the Hawk. Active since 2003, Godreau initially enjoyed independent success with 2 EPs and a full length album selling a total of 15,000 copies.

Biography[link]

Originally from Medfield, Massachusetts, Godreau moved to upstate New York when she was twelve. This was where she learned a number of instruments, including piano, clarinet, oboe, violin and viola before settling on her "$70 Christmas gift": the guitar.

Godreau then took on the pseudonym Gregory and the Hawk in 2003 to avoid being pigeonholed as a singer-songwriter, despite citing her influences as Nick Drake, Liz Phair and PJ Harvey. The name was derived from her brother, Gregory, and his imaginary childhood hawk. This was when she released her demo EP, including early versions of the popular "Boats and Birds" and "Isabelle".^[2] When asked about going by her real name, Godreau responds, "There is no reason for it. But, I’d walk by places and it’d say ‘Playing Tonight – Joe Jones’ and I think that was super-boring and I’d never want to go to that show".

Godreau began playing solo shows in small venues around New England until 2005 when she met Mike McGuire in New York. The two played live shows together for several months before bassist Jeff Ratner and drummer Adam Christgau (both of New York band Paper And Sand) joined the band. The four of them recorded the Boats And Birds EP.^[3]

Boats and Birds[link]

In 2006, Gregory and the Hawk self released the Boats and Birds EP as a home-studio project containing the songs "Isabelle" and "Boats and Birds". Both songs received a great amount of attention on social networking website MySpace, increasing Gregory and the Hawk's popularity. Soon after the release, the four friends moved apart, and so Godreau began playing live with just Ratner on upright bass, and herself on acoustic guitar and vocals.

FatCat Records[link]

In Your Dreams, Gregory and the Hawk's first full length album, was self released the following year with Mike McGuire and Susan Ambrose as the only other players. The album received many positive reviews but it wasn't until a show in Godreau's native Brooklyn that FatCat Records stumbled across her. Before Gregory and the Hawk was signed, Godreau already sold 15,000 copies of her demos and full length album, had 18 pages of cover versions on YouTube, and had several solo shows. As stated by FatCat Records, "[we] discovered our newest signing, Gregory and the Hawk, entirely by accident, whilst out one night at a bar in Brooklyn. An unknown band came on stage and Meredith Godreau began to sing, instantly stunning everyone in the room". A month later, she was in the studio recording her first FatCat single, Ghost and debut album, Moenie and Kitchi, which were both released in September and October 2008, respectively.

During an interview with AU Magazine, Godreau was asked about her work with FatCat Records and responded, "I wasn’t really aiming to be on a record label, but now that I am, there have been so many great people that I’ve met in the last couple of years because of it that I would never, ever say that I wouldn’t want to have that. I’m very glad about the people I’ve met, and not necessarily the technicalities of being on a label". ^[4]

Moenie and Kitchi[link]

In the recording of Moenie and Kitchi, many of the instruments were played by the album's producer, Adam Pierce (Mice Parade), with most vocals and guitars recorded simultaneously in just one take. Gregory and the Hawk took a three-continent tour for this album, taking in support slots for múm, The Album Leaf, Mice Parade, Frightened Rabbit, Asian Kung Fu Generation and other bands.^[5] "Moenie and Kitchi was not produced by me... and I really like[d] it, but it wasn’t very personal to me. I wrote the songs but I felt like it was not something I could have made on my own," Godreau told AU Magazine. Godreau decided to create her most recent album back in her own garage/studio.

Leche[link]

Godreau started working on Leche throughout the winter of 2009, writing and self-recording, then taking her music to a team of friends, engineers, and collaborators including Pierce, as well as Jeremy Backofen (Felice Brothers) and Rob Laakso (Amazing Baby, Diamond Nights, Mice Parade, Swirlies). Godreau writes, "it turned out the idea behind the album was about traveling all around - both physically and psychologically - and observing many different places, people, and behaviors but always from a detached perspective, never directly involved. Traveling was a major influence on the album, as was personal change and growth". The album was released in Canada and the United States on November 9, 2010 and in the UK and Europe on November 15, 2010. ^[6]

Come, Now[link]

Godreau has a new album coming up in June 5 2012 and has posted 3 of her new songs from the new album. Two of them, Cause it's cold and Been too long had been posted in January 2012 while First Flying V had been posted in November 2011. First Flying V can be downloaded for free and those who download can get a bonus track.

Discography[link]

Albums[link]

• In Your Dreams (2007)
• Moenie and Kitchi (2008)
• Leche (2010)
• Come, Now (June 5, 2012^[7])

EPs[link]

• Gregory and the Hawk (Demo) EP (2005)
• Boats and Birds EP (2006)
• Huckleberry Cherry and Boules EP (2010)

Singles[link]

• Ghost (2008)
• Olly Olly Oxen Free (2010)

Compilations[link]

• The Lonesome Call of the... WHPRWHIL, Whprwhil Records (2006)
• Pickathon, Pickathon Roots Music Festival (2006)
• Nano-Mugen Compilation 2009, Ki/oon Records (2009)

^[8]

References[link]