EPISODE · Jan 18, 2022 · 49 MIN
Maximum Return To Nitrogen (MRTN) approach to corn N rate guidelines
from UMN Extension Nutrient Management Podcast · host University of Minnesota Extension
University of Minnesota Extension’s two-day field School for Ag Professionals is coming up July 29 and July 30, 2026. If you’re an agronomist, a retailer, dealer or consultant, if you’re a summer field scout - we encourage you to attend these small-group, hands-on sessions led in the field by experienced instructors. 12 Certified Crop Advisor CEUs credits are available! For all the details, including info on lodging, visit z.umn.edu/AgFieldSchool2026Guests:Dan Kaiser, Extension soil fertility specialistFabian Fernandez, Extension soil fertility specialistJeff Vetsch, U of M SROC researcherBrad Carlson, Extension educator Additional resources:Corn nitrogen rate calculatorHigh nitrogen fertilizer costs: What should corn growers be thinking about?Corn fertilizer guidelinesNutrient Management Conference (Feb. 8, 2022)Nitrogen Conference (Feb. 15, 2022)Nitrogen Smart educational programMinnesota Nutrient Management Initiative
What this episode covers
In this episode of the Nutrient Management Podcast, four U of M researchers discuss the Maximum Return To Nitrogen (MRTN) approach to corn N rate guidelines. What is the MRTN and why was this system implemented? What are the pros and cons of the MRTN approach and how is it performing? What should corn growers know about alternative approaches to the MRTN? Will there be any changes made to the MRTN approach in the future? Thank you to Minnesota's Agricultural Fertilizer Research and Education Council (AFREC) for supporting the podcast.
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Maximum Return To Nitrogen (MRTN) approach to corn N rate guidelines
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