Field corn is a North America 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),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 and waxy corn. "Corn" at Purdue Agriculture
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". Part of it is used to make corn syrup, especially with dent corn. 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.
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]].
Cargill and ADM are the two largest corn processing companies in the United States.
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