Russian Grain Markets: 27-31 August 2018 Grain prices were mainly on an upward trend as sellers limited offer.  Milling wheat export prices fell $3/MT to $225/MT FOB Black Sea, and purchase prices at seaports again increased in RUB expression but decreased in USD expression to $186-191/MT CPT-Black Sea port. The average feed barley export price rose to $235/MT FOB, and the average CPT-Black Sea port price increased to $189/MT. GEOGRAPHICALLY 3rd grade soft milling wheat prices grew in Central and Volga Valley (+$0.80-1.30/MT), the South and Black Soil (+$2.70-3.20/MT), Siberia (+$2.30/MT), and Ural (+$8.30/MT). 4th grade soft milling wheat prices rose in Central (+$0.50/MT), Black Soil and Volga Valley (+$3.60/MT), and Ural (+$2.7...