31 Mar 2017

4R Phosphorus Management Practices for Major Commodity Crops of North America

Phosphorus plays crucial roles in biology and sustainability. It's particularly important in crop nutrition. 4R practices for phosphorus management have great potential to improve both crop yields and water quality. This paper reviews a science-based effort to describe such practices.

11 May 2016

Managing Phosphorus Sustainability

IPNI Webinar presented on 11 May 2016

09 Jan 2016

Lake Erie Phosphorus Issues

Presentations and publications on practices to reduce phosphorus losses from agriculture.

02 May 2014

Crop Nutrient Balances

The crop nutrient balance--the comparison of nutrients applied in relation those removed by crops--is an important indicator of the sustainability performance of crop production. Deficits in the nutrient balance can limit crop yields and deplete soil fertility, and surpluses can cause economic waste

06 Jan 2014

Plant Nutrition Today

One-page news articles on current nutrient stewardship issues.

07 Jan 2013

4R Nutrient Stewardship Portal

Materials developed by IPNI and other cooperators on 4Rs

04 Dec 2012

4R Nutrient Stewardship Topic

Right Source, Right Rate, Right Time, Right Place

Program Profile

About the Phosphorus Program

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Regional Profile (Eastern Canada, Northeast United States)

The region has many areas with a large ratio of livestock to cropland area, leading to challenges of localized nutrient surpluses associated with managing manure as a source of plant nutrients.

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Tom Bruulsema
Vice President, Americas & Research

Tom Bruulsema has played key roles in the development of the 4R Nutrient Stewardship concept, including the co-editing of the IPNI 4R Plant Nutrition Manual. Based in Guelph, Ontario, Canada, he has led research and education programs for the Institute in Eastern Canada and the Northeastern USA since 1995. Dr. Bruulsema has been recognized as a Fellow of the American Society of Agronomy, the Soil Science Society of America, and the Canadian Society of Agronomy. Since July 2015 he has been leading the Institute's Phosphorus Program, focusing on phosphorus management for sustainable agricultural production.

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