 Armed with a smartphone in todays ever more connected world, farmers can remotely monitor the health of their fields, the level of feed in their silos or even the aging of wine in barrels. Both start-ups and agro-industry giants are exhibiting such cutting-edge tools -- tools to help farmers collect and analyze data and improve decision-making -- at the huge CES electronics show in Las Vegas, which closes Sunday.Thus, Olivier Lepine, who heads the French start-up Brad, has developed a sensor th... 