It has been a busy policy day for agriculture with the EPA’s release of the proposed biofuel volumes for 2019 and the Senate taking up the farm bill. The EPA’s proposed Required Volume Obligations (RVOs) under the Renewable Fuel Standard (RFS) boost the overall biofuels volume to 19.88 billion gallons, which would be 10.88 percent of total over-the-road fuel, including gasoline and diesel.

The conventional ethanol volume was maintained at the statutory maximum of 15 billion gallons. The entire 590 million-gallon increase proposed in the overall RVO was provided by the advanced category. Within the overall advanced category, cellulosic fuel was raised by 93 million gallons. The balance of the increase could be met by either un...