This might be of interest here. Posted today by Andrew McGuire. Is focused on farm scale though.
http://www.biofortified.org/2014/08/...improve-soils/
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Blog: chriskafer.wordpress.com
Ignorance more frequently begets knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science. --Charles Darwin
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