Editing Fertilizer (section)

=====Radioactive elements=====
The radioactive content of the fertilizers varies considerably and depends both on their concentrations in the parent mineral and on the fertilizer production process.<ref name=Chaney2012 /><ref name=Mortvedt2014>{{cite web|last1=Mortvedt|first1=JJ|last2=Beaton|first2=JD|title=Heavy Metal and Radionuclide Contaminants in Phosphate Fertilizers|url=http://www.scopenvironment.org/downloadpubs/scope54/6mortvedt.htm|access-date=16 July 2014|url-status=dead|archive-url=https://web.archive.org/web/20140726193234/http://www.scopenvironment.org/downloadpubs/scope54/6mortvedt.htm|archive-date=26 July 2014}}</ref> Uranium-238 concentrations can range from 7 to 100 pCi/g (picocuries per gram) in phosphate rock<ref name=EPA2016>{{cite web|url=https://www.epa.gov/radiation/tenorm-fertilizer-and-fertilizer-production-wastes|title=TENORM: Fertilizer and Fertilizer Production Wastes|date=2016|publisher=US EPA|access-date=30 August 2017}}</ref> and from 1 to 67 pCi/g in phosphate fertilizers.<ref name=Khater2008>{{cite web|last1=Khater|first1=A. E. M.|title=Uranium and heavy metals in phosphate fertilizers|url=http://www.radioecology.info/Bergen2008/proceedings/26.%20Khater%20Uranium%20P.pdf|website=radioecology.info|access-date=17 July 2014|date=2008|archive-url=https://web.archive.org/web/20140724225807/http://www.radioecology.info/Bergen2008/proceedings/26.%20Khater%20Uranium%20P.pdf|archive-date=24 July 2014|url-status=dead}}</ref><ref name=NCRP1987>{{cite book|last1=NCRP|title=Radiation Exposure of the U.S. Population from Consumer Products and Miscellaneous Sources|date=1987|publisher=National Council on Radiation Protection and Measurements|pages=29–32|url=http://f3.tiera.ru/1/genesis/575-579/575000/1160670d5da187ab055c34ebc07487cf|access-date=17 July 2014}}{{dead link|date=January 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref>{{cite journal |author=Hussein EM |title=Radioactivity of phosphate ore, superphosphate, and phosphogypsum in Abu-zaabal phosphate |journal=Health Physics |year=1994 |volume=67 |pages=280–282 | doi = 10.1097/00004032-199409000-00010 |pmid=8056596 |issue=3}}</ref> Where high annual rates of phosphorus fertilizer are used, this can result in uranium-238 concentrations in soils and drainage waters that are several times greater than are normally present.<ref name=NCRP1987 /><ref>{{cite journal |vauthors=Barisic D, Lulic S, Miletic P |title=Radium and uranium in phosphate fertilizers and their impact on the radioactivity of waters |journal=Water Research |year=1992 |volume=26 |pages=607–611 | doi = 10.1016/0043-1354(92)90234-U |issue=5|bibcode=1992WatRe..26..607B }}</ref> However, the impact of these increases on the [[Sievert#Dose examples|risk to human health]] from radinuclide contamination of foods is very small (less than 0.05 m[[Sievert|Sv]]/y).<ref name=NCRP1987 /><ref name=Hanlon2012>{{cite web|last1=Hanlon|first1=E. A.|title=Naturally Occurring Radionuclides in Agricultural Products|url=http://edis.ifas.ufl.edu/ss441|website=edis.ifas.ufl.edu|publisher=University of Florida|access-date=17 July 2014|date=2012|archive-date=25 July 2014|archive-url=https://web.archive.org/web/20140725171240/http://edis.ifas.ufl.edu/ss441|url-status=dead}}</ref><ref name=Sharpley1987>{{cite journal|last1=Sharpley|first1=A. N.|last2=Menzel|first2=R. G.|title=The impact of soil and fertilizer phosphorus on the environment|journal=Advances in Agronomy|date=1987|volume=41|pages=297–324|doi=10.1016/s0065-2113(08)60807-x|isbn=9780120007417|s2cid=83005521 }}</ref>