| Time: 1 - 3 weeks after black layers have formed on 80% of the kernels of most ears. Where: 8 inch segment of stalk found between 6 and 14 inches above the soil. Void damaged stalks and remove sheaths. Amount: Within an area not larger than 10 acres, fifteen 8 inch segments should be collected at random For laboratory specific information regarding plant tissue analysis, procedures, guidelines, test packages/supplies or analysis kits, please contact one of our laboratories nearest you listed below: Laboratory Locations: |
to form one composite sample to be evaluated. Areas of differing soil types or management should be sampled separately. | 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 |
