19 September, 2014
End of season corn stalk nitrate testing is here in many areas. We now have an online end of season corn stalk nitrate analysis form under the "sample type" drop box. Remember the best time to take the sample is 1-3 weeks after black layer. See our library for sampling instructions. Soil sample season is around the corner, call or email us for your supply needs.

Spectrum Analytic Inc.
1087 Jamison Rd NW
Washington Court House, OH 43160-8748

Please note that our mailing address has changed