7 June, 2016
Corn and soybeans are whole plant at seedling stage for tissue sampling. Corn is upper most mature leaf when it reaches approximately 12 inches tall. Wheat plant tissue samples should be the flag leaf after Feekes 10. Nitrogen soil sampling is approaching, 12 inch deep soil sample and corn 12 inches tall is the recommended time. Be sure to send at least a double fist or softball size of plant material.

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

Please note that our mailing address has changed