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Corn Stalk Nitrate Analysis
Basis for Testing
How To Sample
Interpretation of Results

Corn Stalk Nitrate Analysis

Fall Testing: Evaluating Nitrogen Management 

Research conducted at Purdue University and Iowa State University (ISU) show that the nitrogen (N) status of a corn crop can be assessed by measuring nitrate concentrations in the lower portion of cornstalks at the end of the growing season.

Surveys indicate that a high percentage of corn fields receive substantially more N fertilizer than is needed. Click here for Four Facts about Corn Stalk Nitrate Analysis. 

For laboratory specific information, please contact the location nearest you.  

AgSource Locations:

AgSource Laboratories - Bonduel, WI715-758-2178 bonduel@agsource.com 
AgSource Laboratories - Ellsworth, IA 515-836-4444ellsworth@agsource.com 
AgSource Laboratories - Lincoln, NE 402-476-0300 lincoln@agsource.com 
AgSource Laboratories - Umatilla, OR541-922-4894 umatilla@agsource.com