Various business and financial news organizations, as well as stock exchanges, list current commodities prices on their websites. While the data from both are accurate, financial news sites such as Bloomberg present the information in a more casual style, which some may find more comfortable to read.
Crops like corn are priced by a unit defined as a bushel. Therefore, market data presents corn prices in the format of United States Dollar per bushel. News sites like Bloomberg typically display the data in tables or charts along with other commodities in the particular category. Exchanges like Nasdaq, however, often list commodity prices individually in conjunction with related data pertaining to the commodity in question.