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...

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This organization promotes sustainable agriculture. Their website provides publications on production practices, alternative crop and livestock enterprises, innovative marketing, and organic...

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Commercial web site for the solid waste industry provides editorials, case studies, feature articles, regulatory articles, columns, and information about products, suppliers, careers, training,...

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