This University of California Sustainable Agriculture Research and Education Program provides several links to articles on earthworms. These describe the earthworm's importance to ecosystems and...
Most of the research to develop seed varieties specifically for organic production is in public and participatory breeding, and good technical material from such research is increasingly available....
This organization promotes sustainable agriculture. Their website provides publications on production practices, alternative crop and livestock enterprises, innovative marketing, and organic...
This .pdf document, available through the The National Sustainable Agriculture Information Service, provides an overview of basic soil science and how natural methods can be employed to improve soil...
This California site gives tips and legal information on gardening and lawn care for both the homeowner and the professional. Topics include compost, mulch, xeriscape, food scraps, worms, and erosion...
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