Optimum Nitrogen Fertilizer Management Strategies for Modern Corn Hybrids in Manitoba

Optimum Nitrogen Fertilizer Management Strategies for Modern Corn Hybrids in Manitoba – 2017-2020

MCGA funding was provided for soil testing by John Heard in 2017, $106,219 in 2018 & $103,919 in 2019), and Dr. Don Flaten, Department of Soil Sciences, University of Manitoba

This research project is being run concurrently with work by John Heard, Crop Nutrition Specialist, Manitoba Agriculture. Manitoba farmers are planting corn hybrids with much greater yield potential than when the last corn N fertilization trials were conducted by the University of Manitoba almost 35 years ago. Studies in the US have shown that today’s high yielding hybrids are much more efficient than old hybrids with respect to nitrogen use efficiency, i.e. that modern corn hybrids produce more grain per lb of N than old hybrids. This study will test the hypothesis that similar improvements in nitrogen use efficiency have reduced the N requirements per bushel of grain yield for modern corn hybrids grown in Manitoba.

Read the interim report, including preliminary data from 2018, here.

View the poster highlighting the preliminary results below:

Past results are also available, including work with John Heard, Crop Nutrition Specialist with Manitoba Agriculture and Curtis Cavers, Research Agronomist with Agriculture and Agri-Food Canada out of Portage la Prairie. Click on the links if you missed their talk at CropConnect 2018 – (CropConnect Talk on Corn N) or if you want another look at the Research Results Poster that John put together (Nitrogen for Manitoba Corn: Rates and Splits).