Completar Frases RICE AGRICULTUREVersión en línea Information about rice agriculture. por Alfonso Poza 1 legend eastern crop rice calories population consume countries corn cultivated flooded There are over 120 , 000 different varieties of including black and red strains as well as white ones . Rice is the world's No . 1 the world's most important food , ahead of wheat and . It is the chief source of food for about 3 billion people , half of the world's . In Asia , more than 2 billion people rely on rice for 60 to 70 percent of their . If consumption trends continue 4 . 6 billion people will rice in 2025 and production must increase 20 percent to keep up with demand . Top rice production are China , India and Indonesia . Rice is believed to have been first in China or possibly somewhere else in Asia around 10 , 000 years ago . According to a Chinese rice came to China tied to a dogs tail , rescuing people from a famine that occurred after a severe flood . Wild rice grows in forest clearings but was adapted to grow in shallow fields .