1. Phosphorus runoff risk assessment in karstic regions of the United States. Issue 1 (18th February 2020) Authors: Sharpley, Andrew N.; Hays, Phillip D.; VanDevender, Karl W.; Daniels, Mike B. Journal: Agricultural & environmental letters Issue: Volume 5:Issue 1(2020) Page Start: n/a Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗