us geological survey

Agriculture
9:39 am
Tue August 27, 2013

Scientists detect high levels of nitrogen in Midwest waterways

Joe Schatz, a hydrologist with the U.S. Geological Survey, cranks up a sample of Missouri River water near Hermann, Mo.
Abbie Fentress Swanson/Harvest Public Media

This spring and summer, U.S. Geological Survey scientists waded into 100 Midwest streams to test for hundreds of chemicals used in farming, including nutrients, pesticides like atrazine and glyphosate, and livestock hormones. The results from the study are trickling in. But preliminary findings indicate that from May through early July, 21 percent of the region’s streams contained very high levels of nitrogen in the form of nitrates.

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Agriculture
3:13 pm
Mon June 17, 2013

Scientists check Corn Belt waters for effects of ag runoff

One of the U.S. Geological Survey teams collecting water samples and checking cages for fish eggs in Missouri this summer: biologist Diana Papoulias, chemist Dave Alvarez, hydrologist Peter Van Metre, biologist Diane Nicks and toxicologist Don Tillitt.
Abbie Fentress Swanson/Harvest Public Media

Eleven miles northeast of Centralia, Mo., five U.S. Geological Survey scientists don waders and bright reflective life jackets to wade into Goodwater Creek. Plenty of fish live in the stream’s murky slow-moving waters, along with snakes, crayfish, mussels and snapping turtles. On this overcast morning, the team collects water samples and checks submerged cages of fathead minnows for eggs.

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