[Help] I'm writing a paper (for a class) arguing in favor of Permaculture, and I could use some help finding solid articles.

I'd also recommend looking into the nitrogen cycle, which many earth systems scientists identify as a more pressing issues than global warming, and how permaculture doesn't require large scale artificial nitrogen fixation for fertilizer (which requires a lot of energy). Permaculture systems will stop more nitrogen from running into streams, down rivers, and causing Nitrification, an issue you could find a lot of scientific writing about.

Also, any type of no-till food growing system will have a lot of benefits for soil health, especially for stopping erosion. Have a list of the sources I used to write a research paper on no-till agriculture for a soil science class a couple of years ago:

Abril, A. 2005. Efecto acumulativo de la siembra directa sobre algunas caracteristicas del suelo en la region semiarida central de Argentina. Ciencia del Suelo 23.2 pp 179 - 188

Andruschkewitsch, R. 2013. Effects of tillage on contents of organic carbon, nitrogen, water-stable aggregates and light fraction for four different long-term trials. Geoderma 192:368-377.

Baker, J. 2006. Tillage and soil carbon sequestration – What do we really know? AGEE-2834

Fenton, M. 2008. Agronomy Fact Sheet Series: Soil Organic Matter. Cornell University Cooperative Extension.

Margulies, J. 2012. No-till agriculture in the USA, in: Lichtfouse, E. (Ed), Organic Fertilisation, Soil Quality and Human Health. Springer, Dordrecht, pp 11 – 30.

Montgomery, D. 2007. Is agriculture eroding civilization's foundation? GAS Today, 17-10, pp 4 - 9

Redel, Y. 2007. Phosphorus bioavailability affected by tillage and crop rotation on a Chilean volcanic derived Ultisol. Geoderma 139.(3-4):388-396.

Sapkota, T. 2012. Conservation tillage impact on soil aggregation, organic matter turnover and biodiversity, in: Lichtfouse, E. (Ed), Organic Fertilisation, Soil Quality and Human Health. Springer, Dordrecht, pp 141 – 160.

Shaver, T. 2013. Soil sorptivity enhancement with crop residue accumulation in semiarid dryland no-till agroecosystems. Geoderma 192:254-258.

Travlos, I. S. 2010. Effects of no-till farming on global weed-related problems and weed communities of Greece and the ongoing challenges of integrated weed and crop management, in: Nardali, E.T. (Ed.), No-Till Farming. Nova Science Publishers Inc, New York, pp 145 – 157.

Uri, N. 1999. Conservation tillage in U.S. agriculture : Environmental, economic, and policy issues. Food Products Press, New York.

You, J. 2006. No-tillage and manure applications increase aggregation and improve nutrient retention in a sandy-loam soil. Geoderma 134.1-2:24-33.

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