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United States Department of Agriculture

Agricultural Research Service

Nitrogen Decision Aid
 

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Nitrogen Decision Aid

Each Year more than 10 billion kg of nitrogen fertilizer are applied to croplands in the United States at a cost of more that $3.5 billion (USDA Economics and Statistics System, 1998). It is estimated that the efficiency of this applied nitrogen (N) ranges from about 30% to about 70% (Pilbeam, 1998); thus, large amounts of fertilizer N are lost or wasted each year.

The Nitrogen Decision Aid is a computerized program that predicts the amount of N mineralized from planting to side-dress or 5-leaf growth-stage. By applying just enough N-fertilizer to reach the critical soil nitrate concentration it is possible reduce this waste. This model is designed for Northern climates that will have some frost in the soil during the winter.

The resulting output from the Nitrogen Decision Aid should be used as a guide to assist the user in making Nitrogen Management decisions. The USDA - ARS is not liable for any damages resulting from the use or misuse of the Nitrogen Model, its output and its accompanying documentation.

Author's Advisories

Contributors:

Science:

Dr. Alan Olness : Lead Scientist
Soil Scientist
USDA-ARS
North Central Soil Conservation Research Laboratory
803 Iowa Avenue
Morris, MN 56267
Ward B. Voorhees
Soil Scientist, Research Leader and Location Coordinator
USDA-ARS
North Central Soil Conservation Research Laboratory
803 Iowa Avenue
Morris, MN 56267
Dr. David Archer
Agricultural Economist
USDA-ARS
North Central Soil Conservation Research Laboratory
803 Iowa Avenue
Morris, MN 56267




Computer Programming

Dr. Dian Lopez
Computer Scientist
University of Minnesota Morris
600 E 4 Street
Morris, MN 56267
Jason Cordes
Computer Programming Student
University of Minnesota Morris
600 E 4 Street
Morris, MN 56267
Colin Sweeney
Computer Programming Student
University of Minnesota Morris
600 E 4 Street
Morris, MN 56267
Neil Mattson
Computer Programming Student
University of Minnesota Morris
600 E 4 Street
Morris, MN 56267



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Last Modified: 7/25/2014
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