Putting controlled drainage to the test
Can controlled drainage make that big of a difference in drainage flow, nitrogen loss, and overall yields? A research project in the Midwest has been studying that question since 2017, and the findings might surprise you.
Guest host Trey Allis sits down with Jeppe Kjaersgaard, a research scientist studying drainage, nitrogen management, and irrigation. Jeppe traces his journey from the family farm in Denmark to the Minnesota Department of Agriculture, shares results from his controlled drainage field study, and makes a compelling case for collaborating with people across the ag industry.
Jeppe and Trey talk through the methods and findings of a controlled drainage comparison study in Wilkin County, Minnesota. The project includes two sites: a 160-acre field used to gather data on controlled drainage and a 65-acre plot used to explore the impacts of a saturated buffer. Jeppe shares what he’s learning about how different water management methods impact drainage flow, nitrogen loss, and overall yields.
Trey and Jeppe also discuss the Conservation Drainage Network, an organization made up of researchers, drainage professionals, and interest organizations, as well as federal, state, and local conservation district staff. Jeppe talks about the benefits of such a network and how it can help increase adoption of different conservation drainage practices.
Learn more about the Red River Drainage Water Management Project: https://www.mda.state.mn.us/protecting/cleanwaterfund/onfarmprojects/rrvdwmproject [https://www.mda.state.mn.us/protecting/cleanwaterfund/onfarmprojects/rrvdwmproject]
Check out the Conservation Drainage Network: https://conservationdrainage.net/
[https://conservationdrainage.net/]
Chapters:
00:00 - Introductions
01:42 - From Denmark to Minnesota
04:50 - Local differences and global similarities
06:45 - Minnesota Department of Agriculture work
08:27 - Controlled drainage comparison project
13:20 - Highlights and learnings of project
17:38 - Measuring drainage flow, nitrogen loss, and yields
20:00 - Cost analysis and planning for the future
21:58 - Saturated buffer impacts on nitrogen and water flow
26:19 - Using project data to set standards
27:47 - The Conservation Drainage Network
35:47 - Drainage is a key piece of the whole ag picture
41:40 - Closing
Related Content:
* #142: Minnesota's coolest drainage plots [https://www.watertable.ag/podcast/minnesotas-coolest-drainage-plots/]
* #98: Exploring Discovery Farms: A lesson in doing the homework [https://www.watertable.ag/podcast/exploring-discovery-farms-a-lesson-in-doing-the-homework/]
* #110: Bridging the gap between water management research and application [https://www.watertable.ag/podcast/bridging-the-gap-between-water-management-research-application/]
* Jeppe Kjaersgaard on the 2026 Discovery Farms Minnesota Controlled Drainage Webinar [https://youtu.be/tO0XfF5dZTE?si=WDbL3Z82yb5_UfMZ&t=2038]
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