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Soil science / Agriculture / Natural environment / Agricultural soil science / Water pollution / Crops / Environmental soil science / Fertilizers / Nutrient management / Cover crop / Nonpoint source pollution / Dead zone


The Iowa Policy Project 20 E. Market Street • Iowa City, Iowa 52245 • (www.IowaPolicyProject.org September 2010 

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Document Date: 2012-05-18 16:46:18


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