I planted & manage the turf for Hudson WI Soccer (45 Ac) beginning 1997 - took Master gardener class & began looking at many system. In 2002 used it's 13 acres of irrigation every 4 days, mowing mostly once every two weeks, used conventional fertilizers, could feel & see the hard soil through the grass - probe ½” to 3/4", No new young plants, used no mechanical aerification, detention pond would fill 4” on a 3” rain for at lest 6 days, and the turf was getting worse.
Two soil test from Aglabs.com helped make a proposal for next 6 yrs. The board approved more then doubling amendment of near 20 elements. Early 2003 we changed. By the end of 2004 we use 10/15% less water, after 1" rain we mow more often, have no thatch build up, and we walk on a safer carpet of grass. In 2006 mowing a few times twice a week, irrigation is off a lot, can put probe in 3” +/- into the soil, tripled plant count, August we had a 5” in 24 Hr. rain and our detention pond showed no water within 24 hrs., and have very happy customer and their 600 safer children. All we did was change the Amendments, met our goals and saved in all topics of turf management except frequency of mowing. In 2008 cut amendments by 1/3. 2009 in a warm 3 wks drought = no mowing, no water, and no dormancy.
Mike Deneen