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Voluntary efforts will never achieve Iowa's goal to curb nitrogen runoff, water quality researcher says

on Wed, 10/28/2020 - 21:45   by news

Iowa will never achieve its goal to reduce nitrate runoff from Iowa farm fields relying only on voluntary actions of farm operators, according to a hydrologist who has done extensive research on the state's waterways and water quality.

The state has not only has failed to achieve its goal to reduce nitrogen runoff by 45 percent over the past eight years, the 5-year average of nitrate flowing into the Mississippi River has increased, up more than 100 percent between 2003 and 2019, according to Larry Weber, Ph.D, a research engineer with the University of Iowa's IIHR-Hydroscience and Engineering Department.

526,000 tons of nitrates 'exported' into Iowa rivers and streams in 2016; improved monitoring network providing better tracking of farm chemical runoff

on Mon, 12/18/2017 - 23:37   by news

An estimated 526,000 tons of nitrates were "exported" into Iowa rivers and streams in 2016, eventually flowing down the Mississippi River to the Gulf of Mexico and adding to the so-called "dead zone" where fish cannot survive.

According to the Annual Progress Report of the Iowa Nutrient Reduction Strategy (NRS) group released last week (12/12), more than 29 pounds of nitrogen from each of Iowa's 35.75 million acres of crop land ended up in state waterways.

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