Be careful to exclude surface media, particularly if fertilizer has been applied recently. As before, mix the collected materials thoroughly, and take the lab sample from this mixture. Use standard soil-sample boxes and information sheets when submitting samples to the Agronomic Division's soil testing lab. These materials are available from the Division's Raleigh office, regional agronomists, the Cooperative Extension Service, and other agricultural advisors. When testing is complete, results and recommendations are posted on the internet at agronomy.agr.state.nc.us .
Growers also receive a copy of the report in the mail.
Salt index of various fertilizer and liming materials.