Why are food prices rising?

Food prices have been rising steadily in the past few months and the effects are being felt globally. As agricultural commodities such as wheat and dairy trade at record highs, some governments, such as Russia, are implementing price controls on selected types of bread, cheese, milk, eggs and vegetable oil.

But why is food getting more expensive? What role do biofuels play and how has the weather affected crop yields this year? How does the cost of oil factor into the price of food?

More here from the excellent Financial Times