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Nitrogen surplus from agriculture impacts groundwater, according to 70 years of monitoring

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September 26, 2017 Aarhus University  Read full ScienceDaily article here
A new study based on 70 years of monitoring data highlights the importance of a consistent national groundwater monitoring program and the need for development of future effective nitrogen mitigation measures in intensive agriculture worldwide in order to protect groundwater resources….

…In the years 1946 to the mid-1980s nitrogen surplus increased continually. Increasing environmental awareness and national environmental plans have since then curbed this trend — while economic growth continues. Like the nitrogen surplus, the nitrate concentrations in oxic (oxygen present) water reached its peak around the turning point in the 1980s….

Birgitte Hansen, Lærke Thorling, Jörg Schullehner, Mette Termansen, Tommy Dalgaard. Groundwater nitrate response to sustainable nitrogen management. Scientific Reports, 2017; 7 (1) DOI: 10.1038/s41598-017-07147-2

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