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News Release 18-007
Study shows wetlands provide landscape-scale reduction in nitrogen pollution
"Wetland complexes" in a watershed are very effective in reducing nitrate
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![Wetlands](/news/mmg/media/images/Maple_WMA_2017_f.jpg)
Wetlands are important for reducing excess nitrate flowing downstream.
Credit: Amy Hansen
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![Agricultural ditch](/news/mmg/media/images/CH27_080514_c_cropped_f.jpg)
Agricultural ditch with a field of corn on one side and soybeans on the other.
Credit: Katie Kemmit
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![Scientists measure water velocity and collect samples in an agricultural ditch.](/news/mmg/media/images/FB_LK_ds_outlet_2013_f.jpg)
Scientists measure water velocity and collect samples in an agricultural ditch.
Credit: Amy Hansen
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![Researchers collect water samples](/news/mmg/media/images/215_June2017_f.jpg)
Researchers collect water samples for chemical analyses of nitrate concentration.
Credit: Amy Hansen
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![Ecologists collect water samples](/news/mmg/media/images/CH33_080514_c_cropped_f.jpg)
Ecologists collect water samples from an agricultural ditch as a field is readied for planting.
Credit: Katie Kemmit
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![Swans in a flooded farmed depression](/news/mmg/media/images/96_a_9-27-2016_f.jpg)
Swans rest in a flooded, farmed depression.
Credit: Amy Hansen
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