Drainage

This is an extraordinarily good video about grasses, mowing, construction, irrigation, soils, playability, maintenance cost, and more. If you are interested in these topics, watch this interview with Don Mahaffey.

I use the terms surface hardness and surface firmness interchangeably, but I usually prefer surface hardness. In the report I prepared in August 2012 I included this figure, showing the relationship I measured between soil water content (using a Delta-T Device Theta Probe with 6 cm rods) and surface hardness (using a 500 g Clegg Impact Soil Tester).

Sand rootzones are common the world over for golf course putting greens. Many athletic fields are also built with a sand rootzone, and in Asia, many of the tees, fairways, and even roughs are grown in a sand rootzone.