Cereals are the world's largest crops by tonnage of grain produced. Three cereals, maize, wheat, and rice, together accounted for 89% of all cereal production worldwide in 2012, and 43% of the global supply of food energy in 2009, while the production of oats and rye has drastically fallen from their 1960s levels.
Cereals are the world's larges,t crops by tonnage of grain produced. Three cereals maize, wheat, and rice, together accounted for 89% of all cereal production worldwide in 2012 and 43% of the global supply of food energy in 2009, while the production of oats, and rye has drastically fallen from their 1960s levels.