A few of the ways to get exposure to this rally include: PowerShares DB Agriculture (NYSEArca: DBA): 11.4% of DBA is corn futures Teucrium Corn (NYSEArca: CORN): Holds corn futures contracts Market Vectors Agribusiness ( MOO ): Monsanto is 8.4% Tisha Guerrero contributed to this article. Food prices and agriculture exchange traded funds (ETFs) both may reflect the news contained in the USDA's harvest projections. The U.S. Department of Agriculture cut its harvest projections for corn, soybeans and wheat, adding fuel to the commodity-rally fire .