Do contributions vary by State or sub-basin?
|Back to Top| Relative contributions of nitrogen and phosphorus delivered to the Gulf from each of the 31 States in the Mississippi River Basin vary and are provided in the Supporting Information (http://pubs3.acs.org/acs/journals/supporting_information.page?in_manuscript=es0716103). Nine of 31 States, including Illinois, Iowa, Indiana, Missouri, Arkansas, Kentucky, Tennessee, Ohio, and Mississippi (ranked in order of contribution), contribute the largest amounts of nutrients to the Gulf (>75 percent of the nitrogen and phosphorus), but comprise only one-third of the drainage area. These States are associated with the largest acreage of corn and soybeans (85% of the nitrogen), and the largest amounts of non-recoverable animal manure, primarily from pasture land (70% of the phosphorus). Graphic below shows state shares of the total nutrient mass to the Gulf of Mexico.
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- Do contributions vary by State or sub-basin?
