Processed wheat flour samples sit in containers during testing in a laboratory run by Druzhva-Nova, a unit of Kernel Holding SA, in Varva, Ukraine, on Tuesday, July 26, 2016. Russia's wheat-export prices resumed declines last week amid bumper crops in Black Sea nations including Ukraine and Romania, according to the Institute for Agricultural Market Studies, or Ikar. Photographer: Vincent Mundy/Bloomberg via Getty Images