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Tom Bruulsema      
Director

Bio/Contact Information

16 March 2012

What do the 4Rs really mean?

Nutrient stewardship means applying the right source at the right rate, at the right time, and in the right place. What’s “right” depends on your site-specific soils, climate, plant production system, and goals for improved sustainability. Reporting your progress to the people your enterprise impacts gives you social license to operate and raises public awareness of the benefits you bring forward through the use of plant nutrients. Learn more about implementing the 4Rs with the new 4R Plant Nutrition Manual, and see what it means for phosphorus management in the watersheds of Lake Erie in these recent Ohio presentations.


News Publications Presentations
Coming Events
Fertilizer Use and Human Health
How to spot bogus research
The NUE trait in corn
List
Potassium and soybean aphids
The consequences of cutting K
List
Managing your nutrient dollars
Peak Phosphorus?


The Right Place to Put Phosphorus in the Lake Erie Drainage Basin

Phosphorus is an essential nutrient for growing crops. But in the wrong place – in excess concentration in streams, rivers and lakes – it can lead to algal blooms. To grow crops without harming water, fertilizer P must be put in the right place.

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Crop Nutrient Response Tool - VERSION 4.1

On-farm trials can be useful for validating recommendations for most economic rates of fertilizer. This tool is designed to help interpret such fertilizer rate trials.

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Forage Fertilizer Decisions

Top yields of quality forage are crucial to the success of most ruminant livestock production systems. Both yield and quality depend on the application of the right source of nutrients at the right rate, at the right time, and in the right place.

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Crop Nutrition with Lower Emission of Nitrous Oxide

Developing a protocol provides a basis for farmers to receive carbon credits.

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Nitrous Oxide Emission Reduction Protocol (NERP)

Four presentations on 4R Nutrient Stewardship in a protocol for greenhouse gas offset payments.

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Adapting Corn Nitrogen Management to Weather

Presented at Sciences for Sustainability: Soil, Agronomy and Atmosphere in Guelph, Ontario, Canada on 5 August 2009.

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