- Buckeye Forest Council - A grassroots organization dedicated to the protection of Ohio's forests and their inhabitants through education, advocacy, and organizing.
www.buckeyeforestcouncil.org
- OEFFA- Ohio Ecological Food & Farm Association - A grassroots coalition which supports and promotes a healthful, ecological, accountable and permanent agriculture.
www.oeffa.org
- Ohio Agronomy Guide - Ohio State University Extension bulletin on Ohio's climate, soils and water quality, crop production and management and tillage and conservation practices.
ohioline.osu.edu/b472
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