Were did staples crops such as wheat barley and oats grown at?

Staple crops such as wheat, barley, and oats were primarily grown in temperate regions, particularly in areas with suitable climates for agriculture, like parts of Europe, Asia, and North America. The Fertile Crescent, which includes modern-day countries such as Iraq, Syria, and Turkey, is historically significant for the early cultivation of these grains. Additionally, these crops are also cultivated in regions with similar climatic conditions, such as the Great Plains in the United States and parts of Canada.