From The Economist:
Barbarians at the farm gate
Hardy investors are seeking a way to grow their money
IN THE next 40 years, humans will need to produce more food than they did in the previous 10,000 put together. But with sprawling cities gobbling up arable land, agricultural productivity gains decreasing, and demand for biofuels increasing, supply is not keeping up with demand. Clever farmers, scientists and entrepreneurs are bursting with ideas. But they need money to make this jump.