By Ben Aris in Berlin Tit-for-tat sanctions imposed by Russian President Vladimir Putin on imports of EU agricultural products in 2014 following the annexation of the Crimea have seen Russia’s agricultural sector flourish. Heavily dependent on the import of nearly two thirds of its food products in the 1990s, Russia is now a net exporter of food and a global grain powerhouse, after domestic entrepreneurs stepped into the breach left by the departing EU suppliers, and heavy investment into the sector by the state. The most famous example was the creations of a domestic cheese industry following…