soil fertility

"This guide is intended for organic gardeners and those who want to be organic gardeners. It may also be useful for small-scale organic farmers and those interested in the organic movement in general.'
Organic Gardening: A Guide to Resources: 1989-September 2003. Compiled by Stephanie M. Boehmer, Alternative Farming Systems Information Center. September 2003. (Updated Agri-Topics Series, October 1989.)
and
Agri-Topics Series. Compiled by Jane Gates, Alternative Farming Systems Information Center. October 1989.


Quick Bibliography Series: QB 93-54. Updates QB 91-103. 153 citations in English from AGRICOLA in this bibliography were entered in the AGRICOLA database between January 1991 - June 1993. By Karl Schneider, Reference Section, National Agricultural Library. July 1993. NAL Call no. aZ5071.N3 no.93-54.
and
Quick Bibliography Series: QB 96-12. Updates QB 93-54. 148 citations in English from AGRICOLA in this bibliography were entered in the AGRICOLA database between March 1993 - June 1996. By Karl Schneider, Reference Section, National Agricultural Library. September 1996. NAL Call no. aZ5071.N3 no.96-12.