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continued Feature StoryTable 2. Total estimated days of disrupted putting quality in 2009 and 2010 (averaged) as affected by percent surface removal by various corecultivation and verticutting treatmentsSpring %removalFall %removal# Treatment Details MarchDays to99% coverSept.Days to99% coverTotal %removalAverageDisruptedDays1 Control (sand only) 0%% 0 0% 0 0% 02 0.25" id core, 2 passes, Spring & Fall 5%% 32.5* 5% 31* 10% 323 Verticut 3 mm blade, Spring & Fall 11.8% 29.5 11.8% 25.5 23.6% 27.540.25" id + verticut 3 mm blade, Spring;0.25" id core, Fall2.5% +11.8%35.5 2.5% 8.5 16.8% 2250.5" id core, Spring; 0.25" id core,2 passes, Fall9.8% 38.5* 5% 30.5* 14.8% 34.56 0.5" id core, Spring & Fall 9.8% 40 9.8% 34 19.6% 3770.5" id core, Spring; verticut, 3 mm blade +0.25" id core, 2 passes, Fall9.8% 38.55% +11.8%41.5 26.6% 40*Two passes with the 0.25" inside diameter (id) tines resulted in undue tearing, hole overlap and furrowing on the putting surface that served todelay recovery in Treatments 2 and 5 in September.Table 3. Ratings of putting green visual quality at various dates over the three-year trial.Putting Green Visual Quality Rating* 1 to 9 (9 = best)# Treatment DetailsTotal %removalJuly 2008 Sept. 2008 Aug. 2010 Nov. 20101 Control (sand only) 0% 6.5 ab 7.5 ab 7.1 ab 7.8 a2 0.25" id core, 2 passes, Spring & Fall 10% 6.3 b 6.9 c 6.8 b 7.8 a3 Verticut 3 mm blade, Spring & Fall 23.6% 6.3 b 7.1 bc 6.6 b 7.5450.25" id + verticut 3 mm blade, Spring; 0.25"id core, Fall0.5" id core, Spring; 0.25" id core,2 passes, Fall16.8% 6.3 b 7.3 abc 7.3 a 7.6 ab14.8% 6.5 ab 7.8 a 6.6 b 7.5 ab6 0.5" id core, Spring & Fall 19.6% 6.1 b 7.1 bc 6.8 b 7.5 ab70.5" id core, Spring; verticut, 3 mm blade +0.25" id core, 2 passes, Fall26.6% 6.8 a 7.8 a 6.8 b 7.4 bLSD (0.10) 0.4 0.5 0.4 0.3*These ratings represent putting green quality either before cultivation treatments or after complete recovery from cultivation.18| VIRGINIA TURFGRASS JOURNAL January/February 2012 www.vaturf.org
Cover Story continuedaerification or deep verticutting forthree consecutive years. Statistically,the control plots finished with thegreatest thatch/mat OM (4.3%), butthis 0.5% to 1% increase (relative tothe more aggressive treatments) didnot result in lower visual quality.These results point to the importanceof sand topdressing in dilutingOM and in maintaining a high-qualityputting green. Would only applyingsand-topdressing of at least 24 ft 3 /M/yrcontinue to provide acceptable puttinggreen quality at this site near Richmondfor another one, three or five years?Unfortunately, we do not have thisinformation and cannot use these datato confidently look into the futture.These results do demonstrate the need,however, for conducting long-term(5- to 15-year) field research trials.Key pointsOur ultimate goal was to determinecultivation treatments that are sufficientto adequately reduce thatch/mat %OM,Journal of the Virginia Turfgrass Council | 19
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Page 10: VTF ReportNEW LEADERSHIPOPPORTUNITI
Page 13 and 14: examples of each product, however,t
Page 15 and 16: Cover Story continued1,000 ft 2 ) a
Page 17: Table 1. Treatment details and that
Page 22 and 23: Turf TalkPerennial grassy weeds —
Page 24 and 25: continued Turf Talkproper rate has
Page 26: Applied ResearchBetter Turf fora Be
Page 29 and 30: Industry NewsGood News from TPI…E

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