Field corn

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Field corn, also known as cow corn, is a North American term for maize (Zea mays) grown for livestock fodder (silage and meal), ethanol, cereal, and processed food products. The principal field corn varieties are dent corn, flint corn, flour corn (also known as soft corn) which includes blue corn (Zea mays amylacea), [1] and waxy corn. [2]

Contents

Field corn primarily grown for livestock feed and ethanol production is allowed to mature fully before being shelled off the cob and being stored in silos, pits, bins, or grain "flats". Field corn can also be harvested as high-moisture corn, shelled off the cob and piled and packed like silage for fermentation; or the entire plant may be chopped while still very high in moisture, with the resulting silage either loaded and packed in plastic bags, piled and packed in pits, or blown into and stored in vertical silos.

People may pick ears of field corn when its sugar content has peaked and cook it on the cob or eat it raw. Ears of field corn picked and consumed in this manner are commonly called sweet corn, or "roasting ears" due to the most commonly used method of cooking them.

Uses

Large-scale applications for field corn include: [2]

In some parts of Latin America and Mexico, field corn consumption far exceeds that of sweet corn. In the United States, field corn is not generally regarded as desirable for human food without commercial pre-processing. An exception is "roasting ears", similar in appearance to corn on the cob, although it is necessarily roasted (rather than boiled or steamed as is usual with sweet corn), and is neither tender nor sweet even after the roasting. A variety of field corn is also commonly eaten in Andean South America and is known as Cuzco corn.

Wet mills

Field corn is processed for its various uses in what are known as "wet mills". [3] These types of mills are different from traditional mills in that they take apart a cob of corn and process its various parts into products for consumption. The yellow skin of the kernel, for example, is separated from the dark germ, which is essentially the seed. While the yellow skin is usually used to produce nutritional supplements and vitamins, the germ is used to produce oil. The endosperm, which is the largest part of a corn kernel, has the most uses. Its carbohydrate molecules are taken apart to produce the organic compounds used in many products. Examples of these organic compounds include citric and lactic acid, glucose, fructose, and ethanol.

Cargill and ADM are the two largest corn processing companies in the United States.

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<span class="mw-page-title-main">Flour</span> Cereal grains ground into powder

Flour is a powder made by grinding raw grains, roots, beans, nuts, or seeds. Flours are used to make many different foods. Cereal flour, particularly wheat flour, is the main ingredient of bread, which is a staple food for many cultures. Corn flour has been important in Mesoamerican cuisine since ancient times and remains a staple in the Americas. Rye flour is a constituent of bread in both Central Europe and Northern Europe.

<span class="mw-page-title-main">Corn syrup</span> Syrup made from corn used as food additive

Corn syrup is a food syrup which is made from the starch of corn and contains varying amounts of sugars: glucose, maltose and higher oligosaccharides, depending on the grade. Corn syrup is used in foods to soften texture, add volume, prevent crystallization of sugar, and enhance flavor. Corn syrup is not the same as high-fructose corn syrup (HFCS), which is manufactured from corn syrup by converting a large proportion of its glucose into fructose using the enzyme D-xylose isomerase, thus producing a sweeter substance.

<span class="mw-page-title-main">Sweet corn</span> Variety of corn

Sweet corn, also called sweetcorn, sugar corn and pole corn, is a variety of corn grown for human consumption with a high sugar content. Sweet corn is the result of a naturally occurring recessive mutation in the genes which control conversion of sugar to starch inside the endosperm of the corn kernel. Sweet corn is picked when still immature and prepared and eaten as a vegetable, rather than field corn, which is harvested when the kernels are dry and mature. Since the process of maturation involves converting sugar to starch, sweet corn stores poorly and must be eaten fresh, canned, or frozen, before the kernels become tough and starchy.

<span class="mw-page-title-main">Popcorn</span> Variety of corn kernel which expands and puffs up on heating

Popcorn is a variety of corn kernel which expands and puffs up when heated; the same names also refer to the foodstuff produced by the expansion.

<span class="mw-page-title-main">Silage</span> Fermented fodder preserved by acidification

Silage is a type of fodder made from green foliage crops which have been preserved by fermentation to the point of acidification. It can be fed to cattle, sheep, and other such ruminants. The fermentation and storage process is called ensilage, ensiling, or silaging. Silage is usually made from grass crops, including maize, sorghum, or other cereals, using the entire green plant.

<span class="mw-page-title-main">Corn starch</span> Starch derived from corn (maize) grain

Corn starch, maize starch, or cornflour is the starch derived from corn (maize) grain. The starch is obtained from the endosperm of the kernel. Corn starch is a common food ingredient, often used to thicken sauces or soups, and to make corn syrup and other sugars. Corn starch is versatile, easily modified, and finds many uses in industry such as adhesives, in paper products, as an anti-sticking agent, and textile manufacturing. It has medical uses as well, such as to supply glucose for people with glycogen storage disease.

<span class="mw-page-title-main">Forage harvester</span> Harvesting machine

A forage harvester – also known as a silage harvester, forager or chopper – is a farm implement that harvests forage plants to make silage. Silage is grass, corn or hay, which has been chopped into small pieces, and compacted together in a storage silo, silage bunker, or in silage bags. It is then fermented to provide feed for livestock. Haylage is a similar process to silage but using grass which has dried.

<span class="mw-page-title-main">Corncob</span> Central core of corn ear

A corncob, also called corn cob, cob of corn, or corn on the cob, is the central core of an ear of corn. It is the part of the ear on which the kernels grow. The ear is also considered a "cob" or "pole" but it is not fully a "pole" until the ear is shucked, or removed from the plant material around the ear. It is also the green husk that goes outside the corn.

<span class="mw-page-title-main">Corn stover</span> Maize plant parts left in field after harvest

Corn stover consists of the leaves, stalks, and cobs of maize (corn) plants left in a field after harvest. Such stover makes up about half of the yield of a corn crop and is similar to straw from other cereal grasses; in Britain it is sometimes called corn straw. Corn stover is a very common agricultural product in areas of large amounts of corn production. As well as the non-grain part of harvested corn, the stover can also contain other weeds and grasses. Field corn and sweet corn, two different types of maize, have relatively similar corn stover.

<span class="mw-page-title-main">Distillers grains</span>

Distillers grains are a cereal byproduct of the distillation process. Brewer's spent grain usually refers to barley produced as a byproduct of brewing, while distillers grains are a mix of corn, rice and other grains.

<span class="mw-page-title-main">Glucose syrup</span> Syrup made from the hydrolysis of starch

Glucose syrup, also known as confectioner's glucose, is a syrup made from the hydrolysis of starch. Glucose is a sugar. Maize (corn) is commonly used as the source of the starch in the US, in which case the syrup is called "corn syrup", but glucose syrup is also made from potatoes and wheat, and less often from barley, rice and cassava.p. 21

Corn construction refers to the use of corn (maize) in construction. The tassel, leaf, silk, cob in husks, and the stalk are the parts of corn. According to the Michigan Department of Agriculture, "corn can be made into fuel, abrasives, solvents, charcoal, animal feed, bedding for animals, insulation, adhesives, and more. The kernel is used as oil, bran, starch, glutamates, animal feed, and solvents. The silk is combined with other parts of the corn plant to be used as part of animal feed, silage, and fuels. Husks are made into dolls and used as filling materials. The stalk is used to make paper, wallboard, silage, syrup, and rayon ."

<span class="mw-page-title-main">Corn kernel</span> Fruit of corn

Corn kernels are the fruits of corn. Maize is a grain, and the kernels are used in cooking as a vegetable or a source of starch. The kernel comprise endosperm, germ, pericarp, and tip cap.

<span class="mw-page-title-main">Corn ethanol</span>

Corn ethanol is ethanol produced from corn biomass and is the main source of ethanol fuel in the United States, mandated to be blended with gasoline in the Renewable Fuel Standard. Corn ethanol is produced by ethanol fermentation and distillation. It is debatable whether the production and use of corn ethanol results in lower greenhouse gas emissions than gasoline. Approximately 45% of U.S. corn croplands are used for ethanol production.

<span class="mw-page-title-main">Maize</span> Genus of grass cultivated as a food crop

Maize, also known as corn in North American- and Australian- English, is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. The leafy stalk of the plant gives rise to inflorescences which produce pollen and separate ovuliferous inflorescences called ears that when fertilized yield kernels or seeds, which are botanical fruits. The term maize is preferred in formal, scientific, and international usage as the common name because this refers specifically to this one grain whereas corn refers to any principal cereal crop cultivated in a country. For example, in North America and Australia corn is often used for maize, but in England and Wales it can refer to wheat or barley, and in Scotland and Ireland to oats.

<span class="mw-page-title-main">Dent corn</span> Variety of corn

Dent corn, also known as grain corn, is a type of field corn with a high soft starch content. It received its name because of the small indentation, or "dent", at the crown of each kernel on a ripe ear of corn. Reid's Yellow Dent is a variety developed by central Illinois farmer James L. Reid. Reid and his father, Robert Reid, moved from Brown County, Ohio, to Tazewell County, Illinois, in 1846 bringing with them a red corn variety known as "Johnny Hopkins", and crossed it with varieties of flint corn and flour corn. Most of today's hybrid corn varieties and cultivars are derived from it. This variety won a prize at the 1893 World's Fair.

<span class="mw-page-title-main">Corn wet-milling</span> Method of breaking down corn kernels

Corn wet-milling is a process of breaking corn kernels into their component parts: corn oil, protein, corn starch, and fiber. It uses water and a series of steps to separate the parts to be used for various products.

Dry milling of grain is mainly utilized to manufacture feedstock into consumer and industrial based products. This process is widely associated with the development of new bio-based associated by-products. The milling process separates the grain into four distinct physical components: the germ, flour, fine grits, and coarse grits. The separated materials are then reduced into food products utilized for human and animal consumption.

References

  1. Jian Li, p. 3 in Total Anthocyanin Content in Blue Corn Cookies as Affected by Ingredients and Oven Types, 2009, dissertation in Department of Grain Science and Industry, College of Agriculture, Kansas State University, Manhattan, Kansas
  2. 1 2 "Corn" at Purdue Agriculture
  3. Pollan, Michael (2006). The Omnivore's Dilemma. New York: Penguin Press. pp. 85–90. ISBN   9781429535823.