News Detail

MAT Staff August 3, 2020

Fall Nitrogen Fertilizer Restrictions begin September 1, 2020

MDA is providing this as a reminder that the fall nitrogen fertilizer restrictions begin September 1, 2020 as part of the Groundwater Protection Rule. Below are resources to help explain where the restrictions apply and the exceptions to the rule. Please let me know if you have any questions and feel free to share this message with your staff or local contacts.

Where does the restriction apply?
The application of nitrogen fertilizer in the fall and on frozen soil will be restricted in areas vulnerable to groundwater contamination. This will also apply to Drinking Water Supply Management Areas (DWSMAs) with elevated nitrate levels. Vulnerable groundwater areas include coarse textured soils, karst geology, and shallow bedrock. Approximately 12 to 13 percent of Minnesota’s cropland is vulnerable to groundwater contamination. View a map showing the vulnerable groundwater areas as well as a list of exceptions to the restrictions.

Prerecorded Presentation or Live Webinar
We’ve prepared a presentation to explain the purpose of the Groundwater Protection Rule, where the nitrogen fertilizer restrictions apply, and the exceptions to the rule. View the prerecorded presentation or join us for a live webinar through WebEx on August 12, 2020 from 10:00 to 11:00. The video and webinar details are available online.

Thanks in advance for your help to share this information and please don’t hesitate to reach out for more information.

Note that several counties are not subject to the Groundwater Protection Rule.  These are:

Climate Exclusion Less than 3% cropland exclusion
Beltrami Cook
Clay Itasca
Clearwater Koochiching
Kittson Lake
Lake of the Woods Ramsey
Mahnomen St. Louis
Red Lake  
Wilkin (only 1/2 the county)  
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