Which body is primarily responsible for agricultural chemical regulations in Ohio?

The Ohio Department of Agriculture is primarily responsible for agricultural chemical regulations in Ohio. This department oversees the registration and use of pesticides, ensuring that they are safe and effective for agricultural use. It enforces state and federal regulations concerning agricultural chemicals, including pesticides, fertilizers, and other substances applied in farming practices. The Department's role includes educating farmers and agricultural professionals about safe handling practices and compliance with regulations, which is crucial for protecting both human health and the environment.

The other options, while involved in environmental and natural resource management, do not focus specifically on the regulation of agricultural chemicals. The Ohio Department of Natural Resources primarily manages natural resources such as wildlife and forestry; the Ohio Environmental Protection Agency focuses on broader environmental protection issues, including air and water quality; and Ohio State University is an educational institution that may provide research and outreach but does not have regulatory authority in this context.