References

Lowenfels, Jeff, and Wayne Lewis. Teaming with Microbes: A Gardener's Guide to the

Soil Food Web. Timber Press, 2006.

Springen, Karen. "For a Greener Garden". Newsweek 4/9/2007: p87-p89.

"Mulching". NRCS. 2/25/08

<http://www.nrcs.usda.gov/FEATURE/backyard/mulching.html>.

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