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Nitrogen fertilizers > Environmental aspects
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Nitrates

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1.
Concentrations and possible sources of nitrate in water from the Silurian-Devonian aquifer, Cedar Falls, Iowa
Author
Schaap, Bryan D.
Published
Iowa City, Iowa : U.S. Department of the Interior, U.S. Geological Survey, 1999.
Online
https://purl.fdlp.gov/GPO/gpo141104
Location
Yale Internet Resource >> None
Format
Books / Online
2.
Concentrations and possible sources of nitrate in water from the Silurian-Devonian aquifer, Cedar Falls, Iowa
Author
Schaap, Bryan D.
Published
Iowa City, Iowa : U.S. Department of the Interior, U.S. Geological Survey, 1999.
Online
https://purl.fdlp.gov/GPO/gpo141104
Location
Yale Internet Resource >> None
Format
Books / Online