| 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.
Laboratory Locations: |  |
| AgSource Laboratories - Bonduel, WI | 715-758-2178 | bonduel@agsource.com |
| AgSource Laboratories - Ellsworth, IA | 515-836-4444 | ellsworth@agsource.com |
| AgSource Laboratories - Jerome, ID | 208-324-7511 | jerome@agsource.com |
| AgSource Laboratories - Lincoln, NE | 402-476-0300 | lincoln@agsource.com |
| AgSource Laboratories - Umatilla, OR | 541-922-4894 | umatilla@agsource.com |
