Food price crisis: What crisis?: Are we heading for another food price crisis?
Global inventories have fallen sharply since the turn of the century as a result - wheat stocks are down by almost a third, rice by more than 40%, and corn by a half. And these stocks are unlikely to increase. As Mr Sadler says, "even in a good year we just about produce enough food to meet consumption needs".
"The era of cheap food which we take for granted is over. Food will continue to be available, but don't expect the price to go down," he says.
The impact on those living in poverty in the developing world - those who buy the raw ingredients to make their own produce, and who spend a far greater proportion of their income on food - is far, far greater.
"The global population will soon hit nine billion and everyone has to be fed. Making sure they are is the number one challenge of this century. This is not a question of can we, can't we? We have to," says Mr Sadler.
