RobA, You are correct about positive results about using corn gluten meal. There is some good information on it in the "Organics" section of
http://www.lawnsite.com 2cat I think phos will be eliminated in most lawn care programs with the recent high cost of product.In the past it was a cheap way to get some "N" as products lake MAP (mono ammonia phosphate 11-52-0 and DAP (diammonia phospahte 18-46-0 had N @ 2-3 cents per lb Most formulators use a method called "least cost formulation" to get to a certain analysis 16-16-16 for example will have some 46% N urea sone 21%N (ammonia sulfate) and some Dap or Map in it to arrive at the 16% N. I have soil tested thousands of acres in NW Ohio over the last 30 years (mostly for crop production) and rarely find that an established lawn needs any phos.I applaud Michigans efforts to rid phos in lawn care.Look for "K" pot ash to go the same direction as phos in lawn care due to cost over the next 3-5 years.It seems that cost always over rides common sense when it comes to the enviroment, if it takes expensive fertilizer to curb use in lawn care high prices are a great thing. The down side is that expensive fertilizer adds to corn production being about $4.00 per bushel to break even and with a $3.60 corn market its easy to do the math on why we will subsidize agriculture for years to come.(I'll come down off of my soap box now)
