Corn prices on the Chicago Stock Exchange have dropped due to favorable planting weather in the United States and the expectation of a large Brazilian crop. The May price closed at $663.25, down 0.08%, and the July price at $615.25, down 1.72%. Ethanol prices varied by 3 cents last week, with regionally specific prices, and DDGS were priced between $235 and $265 regionally. Corn oil prices also increased by 1 to 3 cents on the dollar. The National Oceanic and Atmospheric Administration (NOAA) predicts rain in various regions, with some areas experiencing dry conditions.