“To truly address the root cause of hunger, we must have a common path forward to tackle such pressing issues as food affordability, availability, nutritional quality and safety,” said Ellen Kullman, chief executive officer of DuPont Co. (DD) (DD), which sponsored the study. “What gets measured, gets done,” she said today in Washington where the report was released.

The research examines food security in 105 nations on the basis of affordability, availability, nutrition content and food safety. After Congo, the nations with the worst nutrition situation were Chad, followed by Burundi and Haiti. Some countries in the bottom third, including Ethiopia and Niger, may improve with rapid economic growth, according to the report.

Because food security is a politically sensitive issue, “what’s important is that these indices be independent, credible and transparent,” Leo Abruzzese, the director of the Americas and global forecasting with the Economist Intelligence Unit, based in London, said at the Washington event. “Every country, even the countries that finished first, will have strengths and weaknesses.”

Residents of wealthy nations have 55 percent more food available than people in poorer countries, 3,400 calories a person per day compared with 2,200, the study found. The United Nations recommends daily intake of 2,300 calories. In the three main areas of food security, the U.S. was first in affordability, fourth in availability and third in quality and safety.

Global food supplies were a topic of discussion at the Group of Eight summit held in the U.S. in May. Before the meeting, President Barack Obama, in his first speech on global food security, announced $3 billion in pledges from companies including Cargill Inc. and Syngenta AG (SYNN) for farm development in Africa, the world’s most food-insecure region, over the next decade.

“Fifty years ago, Africa was an exporter of food,” Obama said in May. “There is no reason why Africa should not be feeding itself and exporting food again.”