Getting Nitrogen Management Right: The 4 R's · Getting Nitrogen Management Right: The 4 R's Rob...

INTERNATIONAL

PLANT NUTRITION INSTITUTE

Getting Nitrogen Management Right: The 4 R's

Rob Mikkelsen, PhD, CCA, CPH Director, Western North America

Administrative Record Page 6942

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Compass Minerals Specialty Fertilizers

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Qatar Fertiliser Company (QAFCO)

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Arab Potash Company

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The Mosaic Company

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Belarusian Potash Company

International Raw Materials LTD.

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CF Industries Holdings, Inc.

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Intrepid Potash, Inc.

PotashCorp

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Started in 1935, the International Plant Nutrition Institute is supported by the leading global fertilizer manufacturers.

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Nitrogen Fertili.zer Plays a Vital Role in Civilization

"Without the use of N fertilizers, we could not secure enough food for the prevailing diets of nearly 45°/o of the world's population, or roughly 3 billion people ... " [Smil, 2011]

Smil, V. 2011. Nitrogen cycle and world food production. World Agriculture 2:9-13. 'liD

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ATMOSPHERIC) FIXATION ~

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DENITRIFICATION

LEACHING LOSS

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Administrative Record 947

Reality:

Agricultural Nitrogen Management Challenge

[INPUTS I Irrigation Water

I N2 Fixation ~

Soil Nitrate & Organic Matter

Fertilizer

Added Organics

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Soil N

Plant Biomass I OUTP-UTS]

Crop Harvest

Soil Organic Matter

Nitrate Leaching

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Nitrogen Management is both Science and Art

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Nitrogen Management- Rate Alone?

The ''4R'' strategy

Right Source at

Right Rate Right Time Right Place

For the crop, field or field zone, and nutrient

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Challenges in Understanding the Fate and Transport of Nitrogen

Some examples:

• What is the fertilizer replacement value of irrigation water nitrate?

• How fast do organic materials release nitrogen?

• Poor water management can negate the best nitrogen plan

• Account for complex rotations and low harvest index (removal)

• Wide range of soil conditions throughout the Valley

• Rooting zone for crops? [from 1 foot to 7 feet]

• How can enhanced-efficiency fertilizers improve N recovery?

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How to determine nitrogen moving past the root zone?

Direct measurement under each field ? -- Enormous data collection -- Impractical and expensive

Mass loading estimates based on field trials ? -- Must be representative sites in trials -- Requires many assumptions ... indirect measure -- Needs new science to quantify components -- More practical, but still not quantifiable

Fate and transport? -- New science and data needed to validate results

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Many interacting factors to adjust to get nitrogen fertilization "right"

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Next Steps? The science of nitrogen fertilizer management is complex and still developing

Fertilizer industry is working with academic experts, coalitions, and commodity groups to develop tools for nitrogen management

Improved 4R practices need to be matched with specific crops and soils- then put tools in hands ·of decision makers and CCA's

Rushing the process ahead of the science will not produce desired water quality results

All partners are committed to rapid progress in improved nitrogen fertilizer management

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nutrient stewardship

4R CONSISTENT SYSTEMS

These systems are consistent with the 4Rs and can help you create a comprehensive 4R nutrient stewardship plan. Learn more about what it means for a nutrient management system to be 4RConsistent.

WILBUR-ELLIS COMPANY 14300 Nicollet Ct., suite 203 Burnsville, MN 55306 ph 952-898-5562

THE ANDER SONS, INC. The Andersons, Inc PO Box 119 Maumee, OH 43537 ph: 800-537-3370

SIMPLOT 999 Main Street, Suite 300AVAIL Boise, 10 83702

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nutrientstewardship.com

IMPLEMENT THE 4RS 4R Nutrient Stewardship represents an innovative approach to fertilizer best management practices (BMPs). The 4Rs imply there are four aspects to every fertilizer application and it provides a framework to assess whether a given crop has access to the necessary nutrients. Asking "Was the crop given the right source at the right rate, at the right time, and in the right place?'' helps identify opportunities to improve fertilizer efficiency and prevent nutrient movement from each field.

To learn more, please download our brochure: ~ Implementing 4R Nutrient Stewardship on the Farm Right Now

This is an example of an unpublished revision.

PARTNERS

CAHADtAN Fnl"nLIZ•R INSTtT\ITI!

I NSTTn.n CANAD4t.N 0«..: E.rcRALS

I"'TT'R"'A110\if> PLAI\:T NUTHITION lhST T\J'L

The Fertilizer Institute 1425 Third Street, S.W., Suite 950 1 Washington, D.C. 200241 ph. 202.962.0490 1 fax: 202.962.0577 Copyright~ 2012 The Fertilizer Institute, AU Rights Reserved.

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