http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Soil health in field and forage crop production
written by Sjoerd W. Duiker, Joel C. Myers, and Lisa C. Blazure.
"[A] combined effort among partners at the USDA Natural Resources Conservation Service, Penn State University Extension, Capital Resource Conservation and Development, and Clinton County Conservation District"--Cover verso.
"Improve your bottom line using: continuous no-till, cover crops, cropping diversity."