The challenge for agriculture over the coming decades will be to meet the world's increasing demand for food in a sustainable way. Declining soil fertility and mismanagement of plant nutrients have made this task more difficult. In this brief, Peter Gruhn, Francesco Goletti, and Montague...

The supply of food—especially grains—in developing countries will have to rise by around 70 percent by 2020 if the 6.5 billion people who are expected to be living there are going to be food secure. Nearly all of this increase in food supply is expected to come from developing countries...