<P> In North America, farmers commonly deliver their newly harvested grain to a grain elevator, a large storage facility that consolidates the crops of many farmers . The farmer may sell the grain at the time of delivery or maintain ownership of a share of grain in the pool for later sale . Storage facilities should be protected from small grain pests, rodents and birds . </P> <P> The following table shows the annual production of cereals in 1961, 2010, 2011, 2012, and 2013 ranked by 2013 production . </P> <Table> <Tr> <Th> Grain </Th> <Th_colspan="5"> Worldwide production (millions of metric tons) </Th> <Th> Notes </Th> </Tr> <Tr> <Th> 1961 </Th> <Th> </Th> <Th> 2011 </Th> <Th> 2012 </Th> <Th> 2013 </Th> </Tr> <Tr> <Td> Maize (corn) </Td> <Td> 205 </Td> <Td> 851 </Td> <Td> 888 </Td> <Td> 872 </Td> <Td> 1016 </Td> <Td> A staple food of people in the Americas, Africa, and of livestock worldwide; often called corn in North America, Australia, and New Zealand . A large portion of maize crops are grown for purposes other than human consumption . </Td> </Tr> <Tr> <Td> Rice </Td> <Td> 285 </Td> <Td> 703 </Td> <Td> 725 </Td> <Td> 720 </Td> <Td> 745 </Td> <Td> The primary cereal of tropical and some temperate regions . Staple food in most of Brazil (both maize and manioc / cassava were once more important and their presence is still stronger in some areas), other parts of Latin America and some other Portuguese - descended cultures, parts of Africa (even more before the Columbian exchange), most of South Asia and the Far East . Largely overridden by breadfruit (a dicot tree) during the South Pacific's part of the Austronesian expansion . </Td> </Tr> <Tr> <Td> Wheat </Td> <Td> 222 </Td> <Td> 650 </Td> <Td> 699 </Td> <Td> 671 </Td> <Td> 713 </Td> <Td> The primary cereal of temperate regions . It has a worldwide consumption but it is a staple food of North America, Europe, Australia, New Zealand, most of the Southern Cone and much of the Greater Middle East . Wheat gluten - based meat substitutes are important in the Far East (albeit less than tofu) and said to resemble meat texture more than others . </Td> </Tr> <Tr> <Td> Barley </Td> <Td> 72 </Td> <Td> 124 </Td> <Td> 133 </Td> <Td> 133 </Td> <Td> 144 </Td> <Td> Grown for malting and livestock on land too poor or too cold for wheat . </Td> </Tr> <Tr> <Td> Sorghum </Td> <Td> 41 </Td> <Td> 60 </Td> <Td> 58 </Td> <Td> 57 </Td> <Td> 61 </Td> <Td> Important staple food in Asia and Africa and popular worldwide for livestock . </Td> </Tr> <Tr> <Td> Millet </Td> <Td> 26 </Td> <Td> 33 </Td> <Td> 27 </Td> <Td> 30 </Td> <Td> 30 </Td> <Td> A group of similar but distinct cereals that form an important staple food in Asia and Africa . </Td> </Tr> <Tr> <Td> Oats </Td> <Td> 50 </Td> <Td> 20 </Td> <Td> 22 </Td> <Td> 21 </Td> <Td> 23 </Td> <Td> Popular worldwide as a breakfast food and livestock feed . In human consumption, oats can be served as porridge as oatmeal, although oats could be eaten in various different forms other than rolled oats, including unprocessed oats . </Td> </Tr> <Tr> <Td> Rye </Td> <Td> 12 </Td> <Td> 12 </Td> <Td> 13 </Td> <Td> 15 </Td> <Td> 16 </Td> <Td> Important in cold climates . </Td> </Tr> <Tr> <Td> Triticale </Td> <Td> 35 </Td> <Td> 14 </Td> <Td> 13 </Td> <Td> 14 </Td> <Td> 14.5 </Td> <Td> Hybrid of wheat and rye, grown similarly to rye . </Td> </Tr> <Tr> <Td> Fonio </Td> <Td> 0.18 </Td> <Td> 0.57 </Td> <Td> 0.59 </Td> <Td> 0.59 </Td> <Td> 0.6 </Td> <Td> Several varieties are grown as food crops in Africa . </Td> </Tr> </Table> <Tr> <Th> Grain </Th> <Th_colspan="5"> Worldwide production (millions of metric tons) </Th> <Th> Notes </Th> </Tr>

What are the three main cereal crops in the world