Phosphorus Restrictions Resources
Legislation restricting phosphorus use on turfgrass in Michigan became effective Jan. 1, 2012.
Natural Resources and Environmental Protection Act (Excerpt), Act 451 of 1994, Part 85 Fertilizers: Sections pertaining to phosphorus restrictions highlighted. (PDF)
New Legislation Restricts Phosphorus Fertilizer Application on Turf, article by April Hunt, MDARD (PDF)