Zinc (Zn) and Sulfur (S) are state-specific. For example, some states do not see a yield increase to fertilizer sulfur applications, while other states do.

For these recommendations consult:

Arkansas: http://www.uark.edu/depts/soiltest/

Kansas State: http://www.oznet.ksu.edu/library/crpsl2/mf2586.pdf

Kentucky: http://www.ca.uky.edu/agc/pubs/agr/agr1/agr1.pdf

Illinois: http://iah.aces.uiuc.edu/index.php?ch=ch11/

Iowa State: http://www.extension.iastate.edu/Publications/PM1688.pdf

Indiana (Purdue): http://www.entm.purdue.edu/entomology/ext/targets/p&c/P&C2005/P&C25_2005.pdf

Michigan State: http://www.css.msu.edu/SPNL-SoilTestReport.cfm

Mississippi State: http://msucares.com/crops/soils/index.html

Missouri: http://aes.missouri.edu/pfcs/research/prop406.pdf

Nebraska: http://www.ianrpubs.unl.edu/epublic/pages/publicationD.jsp?publicationId=142

North Carolina State: http://www.ces.ncsu.edu/plymouth/cropsci/cornguide/Chapter3.html

Ohio State: http://licking.osu.edu/agriculture/licking-county-agronomy-report/issue17.pdf

Penn State: http://www.aasl.psu.edu/SOILRecHdbks.HTM

Virginia Tech: http://www.soiltest.vt.edu/

Wisconsin: http://www.soils.wisc.edu/extension/

For more information on this or other topics related to corn production, contact your state extension corn specialist or your local extension educator/agent.

The following is the link to the corn extension specialists: state extension corn specialist