Russia has more potential agricultural area than anywhere else in the world but it has run out of potatoes and onions. Even President Vladimir Putin conceded there is a problem. "It turns out we are short of potatoes," he recently said, noting the lack of sugar beet and some other vegetables too. That came after the price of potatoes soared in Russian shops, almost tripling within the last year, according to official figures. Meanwhile the price of onions has doubled. Cabbage is now 50% more expensive than it was a year ago, says statistics agency Rosstat. Russians had to pay...