I was in Korea a couple weeks ago for this seminar on putting green maintenance. That seminar lasted just an hour, and after lunch I spoke for a few hours with superintendents and course maintenance staff from the Golfzon County group.

The afternoon session was informal, and the questions were universally applicable. Here's what we discussed, with links to additional reading on these topics:

• the use of plant growth regulators during summer and the growing degree day model of Kreuser et al.
• the best way to irrigate greens, how much soil moisture should be kept in the soil, and should irrigation be applied frequently or infrequently? 
• timing of nitrogen applications through the year, specifically in autumn
• how one might core aerify greens, what the standard method is, and how to minimize disruption to golfers by maximizing the surface area affected at each time of aerification
• optimum mowing heights for creeping bentgrass on busy golf courses, when busy means more than 100,000 rounds for 18 holes; I don't know the answer to this one, but I suggested something in the range of 4 to 4.5 mm.