Reuters: German oil mills fear supplies of rapeseed for biodiesel production may be disrupted by new European Union rules requiring feedstocks come from certified sustainable farming, an oilseeds industry leader said on Friday. Germany will from January 1 2011 impose the EU renewable energy directive, a measure originally aimed at protecting tropical rain forests from being cut down for palm and soyoil production. But other EU countries will not follow in January, so technically German biodiesel producers…