"Sometimes in the next few years we're going to have very serious shortages of food everywhere in the world and prices are going to go through the roof."
Cotton and coffee are good buys because they are very distressed, while sugar, despite the fact that it has gone up a lot, is still down 70 percent from its all-time high, according to Rogers.
"I don't think that the problems of the world are behind us yet," he said.
Investors shouldn't bother with stocks because commodities are likely to win in both the optimistic and the pessimistic scenario, Rogers said.
If the economy rebounds, commodities prices will rise because of increased demand, while if the economy continues to be weak, central banks will keep printing money and commodities will be used as a hedge against inflation, he explained.
Rogers is holding on to oil and he is also holding on to gold, saying they are too expensive to buy but not worth selling.
"If you want to buy precious metals I'd rather buy silver and palladium, just because they're cheaper," he said.
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