Golf Course Management

JUL 2017

Golf Course Management magazine is dedicated to advancing the golf course superintendent profession and helping GCSAA members achieve career success.

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92 GOLF COURSE MANAGEMENT 07.17 John Mascaro President of Turf-Tec International Presented in partnership with Jacobsen As everyone knows, grass never dies in a straight line. While I was attending a turfgrass field day at the University of Florida's Plant Science Research and Ed- ucation Unit in Citra, I noticed this line across a section of 419 bermudagrass and knew exactly what it was. As the second photo shows, the off-color line was caused by a water hose that had been left on the turf, resulting in high- temperature leaf injury. Objects like hoses, bunker rakes and almost anything left on turf in direct sunlight can retain heat and damage the turf. Because this area is not on an actual golf course, no additional inputs were required. The hose was simply removed, and the area greened up a couple of days later. Thanks to Jason K. Kruse, Ph.D., associate professor of turfgrass science at the Univer- sity of Florida in Gainesville, Fla., for allowing me to take these shots. If you'd like to submit a photograph for John Mascaro's Photo Quiz, please send it to: John Mascaro, 1471 Capital Circle NW, Suite #13, Tallahassee, FL 32303, or email it to john@turf-tec.com. If your photograph is selected, you will receive full credit. All photos submitted become property of GCM and GCSAA. The brown circle around this sprinkler head was the result of a sprinkler head that was too low in the ground. However, it is the rest of the story that makes this photo most interesting. When I was touring this 20-plus-year-old golf course in Hawaii, I came upon an area on this paspalum fairway that had the telltale signs of poor irrigation uniformity. Looking closely at the irrigation head, the reason seemed pretty obvious — the swing joint had settled down into the soil over time and was not allowing the sprinkler to rise up high enough to achieve proper irrigation coverage. But despite the obvious signs, we decided to take a closer look, because this area of the fairway was 20-year-old sea- shore paspalum. As it turned out, the sprinkler head was actually uniform with the soil surface. Instead, the head was so low because the paspalum itself had grown up about 8½ inches above the soil surface, overgrowing the pop-up riser height of the sprinkler. Despite the agronomic oddity, the area remained firm and was not spongy. Photo from John Mascaro's collection. (photo quiz answers) (a) PROBLEM PROBLEM ( b )

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