Beyond the nutrient strategies: Common ground to accelerate agricultural water quality improvement in the upper Midwest

Journal of Environmental Management
Reid ChristiansonMoira McDonald

Abstract

Nutrients in drainage waters from the Upper Mississippi River Basin states have been a well-documented contributor to the Gulf of Mexico hypoxic zone for decades, and in response, twelve states have developed strategies to address this issue, with Iowa, Minnesota, and Illinois performing rigorous science assessments which estimated nitrogen and phosphorus reduction effectiveness for numerous agricultural non-point source conservation practices. The practices identified in these strategies were compared to identify areas of consensus and discord on nutrient load reduction potentials. Additionally, each practice was assessed for (1) the suitability to stack or be layered with other practices (stackability), (2) the ability to track implementation within a state or regionally (trackability), and (3) the level of production system change required to implement the practice. Overall, there was general consensus among the state strategies in the nutrient load reduction effectiveness of most practices with the exception of cover crops (10%-31% nitrogen reduction) and bioreactors (13%-43% nitrogen reduction). The most effective water quality-improvement practices (i.e., land-use change practices) required relatively more production syst...Continue Reading

Citations

Jan 19, 2021·Journal of Environmental Management·Yupeng MaoAoxiang Fan
Mar 2, 2019·Journal of Environmental Management·E A MartinM L Soupir
Jul 23, 2021·Environmental Monitoring and Assessment·Matthew T Streeter, Keith E Schilling
Apr 14, 2019·Environmental Science & Technology·Tristan C BallardAnna M Michalak
Aug 15, 2021·Journal of Environmental Quality·Giovani Preza-FontesLaura E Christianson
Dec 7, 2021·The Science of the Total Environment·Pieter Van AkenLise Appels

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