Nutrient Indicator Models for Determining Biologically Relevant Levels : A case study based on the Corn Belt and Northern Great Plain Nutrient Ecoregion - Morris, Charles Clarence; Simon, Thomas Paul.; SpringerLink (Online service) (Dordrecht : Springer Netherlands : Imprint: Springer, 2012)
1. Introduction -- 2. Methods -- 3. Results -- 4. Discussion -- 5. Conclusion .
Keywords: Environmental health; Applied ecology; Ecotoxicology; Environmental management; Agriculture; Environmental Health; Applied Ecology; Ecotoxicology; Environmental Management; Agriculture