As of my last knowledge update in October 2023, maize (or corn) is grown in many parts of the world, but the primary regions for maize cultivation include:
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United States: The U.S. is the largest producer of maize, with major growing areas concentrated in the Midwest, particularly in states like Iowa, Illinois, Nebraska, Indiana, and Ohio.
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China: China is also a leading producer, with significant cultivation in provinces such as Henan, Shandong, and Sichuan.
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Brazil: Brazil has rapidly increased its maize production, primarily in the central-west region, including states like Mato Grosso and Goiás.
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Argentina: Another major producer in South America, with primary cultivation in regions like Buenos Aires and Córdoba.
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Mexico: As the native land of maize, Mexico continues to grow significant amounts, particularly in states such as Sinaloa, Jalisco, and Puebla.
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Ukraine: Ukraine is a key player in maize production in Europe, with its fertile soil, particularly in the central and southern regions.
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India: Maize is an important crop in India, especially in states like Karnataka, Andhra Pradesh, and Punjab.
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South Africa: The primary maize-growing areas include the Free State and North West provinces.
These regions are known for their favorable climates, soil conditions, and agricultural practices that support high maize yields. However, production levels can vary year by year due to factors such as climate conditions, market demand, and changes in agricultural policy.