USDA Natural Resources Conservation Service (NRCS). 2012. NRCS Alerts Farmers About Dangers of Manure Agitation. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/pa/home/?cid=nrcs142p2_018239

USDA Natural Resources Conservation Service (NRCS). 2012. NRCS Alerts Farmers About Dangers of Manure Agitation. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/pa/home/?cid=nrcs142p2_018239acs-admin2022-10-07T14:22:30+00:00