Jim Rogers is a long-term bull on commodities based on scarcity in a growing world. Silver and gold "will both go much higher over the next few years," he tells Economic Times. Oil prices will recover as "known quantities of crude continue to decline." Sugar is going to "at least double or triple before this all is over." But there's only one sector he would buy right now: I am thinking about buying agriculture right now. I am not thinking about buying base metals or gold or oil right now, but I am thinking of buying agriculture maybe this afternoon....