A drone plane flies over a crop field on May 6, 2014 in Caulieres, northern France, during a demonstration of the French Somme department Chamber of Agriculture of the drone it acquired at the end of 2013, as the test period nears to and end. The GPS guided drone surveys an area by measuring the supply nitrogen necessary to improve productivity, allowing farmers to adjust and limit the use of crop treatment products. AFP PHOTO / DENIS CHARLET (Photo credit should read DENIS CHARLET/AFP/Getty Images)
