Maguire, Rory O.2020-03-042020-03-042020http://hdl.handle.net/10919/97179As excess phosphorus continues to be imported onto farms and soil tests phosphorus continues to increase, soil test concentrations will approach the regulated upper soil test threshold limits where not more phosphorus can be applied. No more phosphorus applications mean no further manure applications. Therefore, addressing the farm mass balance of phosphorus is essential to the long term sustainability of animal farming operations.5 pagesapplitcation/pdfen-USVirginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.Extension publicationhttps://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/CSES/CSES-98/SPES-178.pdfPhosphorus fertilizers