Aaron Heilers, Blanchard River Demonstration Farms project manager, speaks Tuesday evening at the Rockford Community Building during the Mercer County Agriculture Day event. Topics discussed during the event included using cover crops for soil health, soil characteristics, turning data into decisions for agriculture and farming in the Western Lake Erie Basin. Also included was a question-and-answer session with officials from the Mercer County Soil and Water Conservation District, the staff from the Mercer County Farm Service Agency and staff from the USDA's Natural Resources Conservation Service. Tuesday was National Agriculture Day.