By the Natural Resources Conservation Service, this is more oriented towards natural environments. However, researchers and students in agriculture could find some of it useful, especially scrolling down to the "cover crops" section of the database from the homepage could be fruitful.
A large database containing scholarly journal articles and conference papers on any topic in science, technology, medicine, social sciences, and arts & humanities. Includes cited references and h-index information. Click here for tutorial
Please note that for members of the public visiting Parks Library, this resource is only available from a Parks Library workstation, and not from a mobile device connected to the campus wireless network: