It makes more food and protects the food. (If it's geneticaly modified) From: economist.Com -
A SEED of rice that could transform the developing world saved Asha Ram Pal’s farm in the Indian state of Uttar Pradesh in the summer of 2008. Mr Pal had planted rice on his small plot, not much bigger than a football field. Floods are an ever-present threat in the state, making it one of the poorest places in the world. And that year the monsoon was particularly heavy, remembers Bob Zeigler, director of the International Rice Research Institute (IRRI). Mr Pal’s fields flooded for two weeks after he planted the rice seedlings; a few weeks later, they were inundated again. He thought his crop was lost. His neighbours advised him to do what they have always done when the floods come: prepare for hunger.
But this time Mr Pal had planted an experimental seed developed by scientists from IRRI in the Philippines. The seed has a genetic sequence bred into it which puts it into a sort of suspended animation when submerged. Instead of drowning, Mr Pal’s rice sprang back when the water receded. In a normal year he gets a tonne or so from his 1-hectare (2.5-acre) plot; in a bad year nothing. In that terrible flooded season, he harvested 4.5 tonnes—as good a yield as on any rain-fed paddy in the world