Assertion: fertilizer's nutrient | /r/HasProperty | u.s. geological survey
Facets:
Source sentences:
text: Specifically, the USGS, through its Toxics and National Stream Quality Accounting Network programs, is addressing two issues: (1) the loads and sources of nutrients delivered to the Gulf of Mexico, and (2) the relative importance of specific human activities such as agriculture, atmospheric deposition, and point-source discharges in contributing these nutrients (U.S. Geological Survey, December 18, 1998, Hypoxia in the Gulf of Mexico, accessed May 4, 1999 at URL http://www.rcolka.cr.usgs.gov/ midconherb/hypoxia.html).