Iowa

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Soil Is Much More Than 'Dirt'


● http://civileats.com/2017/05/05/the-leopold-center-for-sustainable-agriculture-faces-a-shut-down/ (2017)

● http://e360.yale.edu/features/why-its-time-to-stop-punishing-our-soils-with-fertilizers-and-chemicals

https://www.greenpolicy360.net/w/Soil_Loss
https://www.greenpolicy360.net/w/Category:Soil
https://www.greenpolicy360.net/w/Category:Agriculture


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