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Bill Deen

University of Guelph

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IPNI-2008-CAN-ON29Long-term Optimum Nitrogen Rate for Corn Yield and Soil Organic Matter

North America

Please Note

The agronomic programs of IPNI outside Canada ceased operations on April 1, 2019. This website remains online to provide a repository of past IPNI publications. Questions about past IPNI operations and projects can be forwarded to the International Fertilizer Association, The Fertilizer Institute, or Fertilizer Canada.

IPNI's Mission

The mission of IPNI is to develop and promote scientific information about the responsible management of plant nutrition for the benefit of the human family.

IPNI is a global organization with initiatives addressing the world's growing need for food, fuel, fiber and feed. There is widespread concern for issues such as climate change and relationship of crop production to the environment and ecosystems, and IPNI programs are achieving positive results. Best management practices (BMPs) for nutrient stewardship encourage the concept of applying the right product (source), at the right rate, at the right time, and in the right place.

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