Big River Keeps on Rollin’ – Study Finds Little Nitrate Retention in the Upper Mississippi
A new study says that, despite dozens of locks and dams and backwater habitats that slow it’s flow, the Upper Mississippi River isn’t good at retaining the nitrates that run into its waters from intensively farmed states like Minnesota, Illinois and Iowa. Published July 12th in Environmental Research Letters, the study finds that only12.5% of …