The crop and livestock markets took note and the supply chains saw disruptions from the polar blast that’s descended upon the U.S. this week. Grain shipments have been delayed because of issues the freezing temperatures have caused for rail transportation. As the power grid has been strained in parts of the country, large ag processors including ethanol plants have had to slow down operations because of energy usage. And lapses in available energy and transportation disruptions have forced some dairy farmers to dump milk to match the hitches in the supply chain. The grain and energy markets moved higher on Tuesday on news of the disruptions, with the wheat market now tuning its attention to possible winter wheat damage from the Arctic blast that sent temperatures below zero as far south as Oklahoma and parts of Texas. See more.