22 May, 2019
High amounts of nitrogen losses may have occurred in corn fields since application. When the corn is approximately 10 inches tall, that is a good time to take a preside nitrogen soil test. Now is the time to evaluate your wheat fertility program. Flag leaf is the plant part needed at this time. See the plant sample guide on our website for complete instructions on parts of plant to submit as well as approximate amount of plant material. Normally a double fist or softball size of material is sufficient. Be sure to submit in a paper bag with no plastic lining.

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