Wheat, rice and corn are called the three major food crops.

1, wheat, the world's largest sown area, the highest yield, the most widely distributed food crops. 1990, the sown area of wheat was 2310.5 million hectares, accounting for about13 of the world's total sown area of grain, and the wheat output was 595,654.38+million tons, accounting for about 3 1% of the world's total grain output.

2. Rice is one of the most important food crops in the world. 1990 sown area145.8 million hectares, accounting for more than 20% of the world's total grain sown area, with an annual output of 518.5 million tons, accounting for 27% of the world's total grain output.

3, corn, people's food is also a feed crop, which is regarded as "miscellaneous grains" or "coarse grains". 1990 sown area 12965438+ 10,000 hectares, accounting for 18.5% of the total sown area of grain in the world, ranking third after wheat and rice.

The main producing area of rice is in Asia.

In terms of global rice production, the Asian continent is dominant, with China and India leading. Asian countries produce the most rice, while countries in Africa, Latin America and the Middle East have greatly increased their consumption and demand for rice.

In other countries in the world, such as sub-Saharan Africa, rice is regarded as the fastest growing staple food, and the per capita consumption of rice has almost doubled since 1970s. Decades ago, urban and rural residents in sub-Saharan Africa only ate rice on special occasions.

But in recent years, they began to eat rice every day instead of choosing other local crops, such as cassava, sweet potato and yam. In the Caribbean and Latin America, rice consumption has increased by about 40% in the past 20 years. Once again, it is attributed to the steady growth of income and the sustained growth of population.

Another area where rice consumption has increased significantly is the Middle East, as well as the United States and European Union member countries. The increase of the latter is partly due to immigration from countries that consume more rice and the increasing globalization of food supply and taste. The demand for rice is still rising.