A list of cereal grains includes wheat, corn, barley, rye, millet, oats, rice, sorghum and teff. Some whole grains that are considered pseudo-cereal grains include buckwheat, quinoa and amaranth.
Corn, or maize, is the highest produced cereal grain in the world with 817 million tons grown. It is an important staple crop for humans and animals. Its tolerance to various climates makes it a relatively easy crop to grow.
Rice has the second largest production worldwide with 685 million tons harvested. This crop is produced on a wide scale in many countries, primarily India, China, Pakistan and Indonesia. Despite its popularity, it requires a large amount of water during cultivation.
Wheat has the third largest production at 600 million tons. It is produced and used most widely in Europe, Africa and North America. It has been used as a major source of food for at least 8,000 years. It is also critical in the production of ethanol and starch.
Teff is a little-known cereal grain native to and consumed in Eritrea and Ethiopia. This grass species produces tiny seeds that are fermented or cooked. It requires large amounts of sunlight to grow properly.