Winter wheat

An ear of winter wheat.

Winter wheat with fall colors in the eastern United States

Winter wheat (usually Triticum aestivum) are strains of wheat that are planted in the autumn to germinate and develop into young plants that remain in the vegetative phase during the winter and resume growth in early spring. Classification into spring or winter wheat is common and traditionally refers to the season during which the crop is grown. For winter wheat, the physiological stage of heading is delayed until the plant experiences vernalization, a period of 30 to 60 days of cold winter temperatures (0° to 5 °C; 32–41 °F).^[1]

Winter wheat is usually planted from September to November in the Northern Hemisphere and harvested in the summer or early autumn of the next year. In some places (e.g. Chile), winter wheat even celebrates a "birthday", meaning it is harvested more than a year after it was planted. Winter wheat usually provides higher yields compared to spring wheat.

So-called "facultative" wheat varieties need shorter periods of vernalization time (15 – 30 days) and temperatures of 3° to 15 °C (37–59 °F). In many areas facultative varieties can be grown either as winter or as a spring, depending on time of sowing.

In countries that experience mild winters, such as in South Asia (India, Pakistan, Nepal, Bangladesh), North Africa, the Middle East and the lower latitudes (e.g. Sonora in Mexico), spring wheat (not requiring a period of vernalization) is also sown in the autumn (November/December) and harvested in late spring (April - May) the next year. This spring wheat planted in the autumn and grown over the winter is sometimes also incorrectly called "winter wheat".

Hard winter wheats have a higher gluten protein content than other wheats. They are used to make flour for yeast breads, or are blended with soft spring wheats to make the all-purpose flour used in a wide variety of baked products. Pure soft wheat is used for specialty or cake flour. Durum, the hardest wheat, is primarily used for making pasta. Almost all durum wheat grown in North America is spring-planted.^[2]

Winter wheat is grown throughout Europe, North America, and in Siberia.

United States

Winter wheat was brought to Kansas by German-Russian Mennonites in the 19th century. Bernhard Warkentin and Mark A. Carleton played a major part in the spread of winter wheat as a commercial crop. Warkentin organized mills in central Kansas and imported seed from Ukraine to meet growing demand. Carleton worked for the United States Department of Agriculture (USDA) as a crop explorer. He went to Russia to find other wheat varieties and worked with Kansas State University researchers to develop new ones. Winter wheat production quickly spread throughout the Great Plains, and was, as it still is, usually grown using the techniques of dryland farming.

Literature

• Olaf Christen, ed. (2009), Winterweizen. Das Handbuch für Profis (in German), DLG-Verlags-GmbH, ISBN 978-3-7690-0719-0 

References

External links

• Carver, Brett F. (2009). "Early Triumph Wheat". Encyclopedia of Oklahoma History and Culture. Oklahoma Historical Society. 

Wheat
Types	Common Durum Einkorn Emmer Khorasan Norin 10 Red Fife Spelt Winter wheat
Agronomy	Wheat diseases list Wheat mildew Hessian fly
Trade	Australian Wheat Board Canadian Wheat Board Corn exchange Exports International Wheat Council Peak wheat Production statistics Protein premium Wheat pools in Canada
Plant parts and their uses	Stalk Straw Seed Bran Germ Chaff (husk) Endosperm Gluten
Basic preparation	None Berries or groats Milling Farina Flour Middlings Semolina Parboiling Bulgur
As an ingredient	Bread Couscous Cracker Flatbread Pasta Wheat beer Wheat germ oil Wheat gluten
Associated human diseases	Anaphylaxis Gluten-related disorders coeliac disease non-celiac gluten sensitivity wheat allergy dermatitis herpetiformis ataxia
Related concepts	Bread riot Plant breeding Refined grains Staple food Wheatpaste Whole grain Shattering Tell Abu Hureyra Tell Aswad
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