Pertanian organik: Perbedaan antara revisi

* [http://www.extension.org/organic%20production Organic Agriculture.] eOrganic Community of Practice with eXtension: America's Land Grant University System and Partners.

* [http://www.snre.umich.edu/newsroom/2007-07-10/organic-farming-can-feed-the-world-u-m-study-shows Organic farming can feed the world, U-M study shows.] University of Michigan News Service. July 10, 2007.

 

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