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30 Year Old Trial Finds Organic Farming Outperforms Conventional Agriculture | Permaculture Magazine
permaculture.co.uk/news/1006156357/30-year-old-trial-finds-organic-far..
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Comparing the yields of organic and conventional agriculture : Nature : Nature Publishing Group
nature.com/nature/journal/v485/n7397/full/nature11069.html
meta-analysis comparing efficiency of Organic with conventional agriculture
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permaculture biodiversity agricultural yield Organic agriculture
Link by John Stumbles

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