As much as growers long for an end to the trade war with China, there are long-term threats to demand for corn, soybeans and other crops that could depress commodity prices for years to come and lead to calls for higher government spending, economists say.

Biofuel advocates may be fuming about the Environmental Protection Agency's recent actions granting small refinery exemptions to oil refineries, but they'd better check their rearview mirror. Electric vehicles may soon have policy in place to put them in the energy passing lane as climate talks in Congress move ahead.

A new USDA study finds that corn-based ethanol is 39 percent lower in greenhouse gas emissions on average than conventional gasoline.