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Supertopics:
Efficiency of Organic Farming

Organic Farming As Efficient

Subtopics:
webChelsea HarveyWashington Post2015-06-02
webDavid Blumepermaculture.com2015-05-18
webLand Stewardship Project2008-04-01
webUnep-Unctad2008-01-01
webNicole WinfieldAssociated Press2007-05-05
webBiology News Net2005-07-01