October 2017

SportsTurf provides current, practical and technical content on issues relevant to sports turf managers, including facilities managers. Most readers are athletic field managers from the professional level through parks and recreation, universities.

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Page 17 of 51

www.spor 18 // October 2017 results have demonstrated it is such a small amount that it hasn't impacted water infi ltration or changed the rootzone organic matter to any degree. Many athletic fi eld managers will use solid tine aerifi cation with a light topdressing several times during the playing season to help maintain the playing surface. Some athletic fi eld managers will perform solid tine aerifi cation weekly during the season, or every time the fi eld has a couple days of downtime. The key is balancing being aggressive enough with solid tine aerifi cation, while not being over aggressive and ruining the stability of the fi eld. Also keep in mind not to open the rootzone up to the elements right before a major change in temperatures, as you will do more harm than good. Incorporating topdressing sand into the rootzone is typically done only with solid- or hollow-tine aerifi cation; however there are a couple of other machines that have demonstrated some success for athletic fi eld managers. One is the DryJect, which uses a blast of water to create an aeration hole, which is immediately fi lled with sand supplied from a hopper on the machine. DryJect has a Maximus nozzle to allow for a larger aeration hole than traditionally used on golf greens, which will allow for more sand incorporation. Keep in mind this machine uses a blast of water to incorporate the sand, so the fi eld may have higher soil moisture levels for a day or two after treatment. Another device that can be used is the Imants ShockWave, which will cut slits into the fi eld, going perpendicular directions will create channels for the sand to fall into when topdressing (Figure 6). This device creates very little surface damage and could be used during the season to help with topdressing incorporation. Figure 4. This picture shows a good transition for topdressing and aerification holes. Figure 6. The Imants ShockWave can be used to incorporate some topdressing sand into the rootzone while causing minimal amount of disruption to the playing surface. Figure 5. The Wiedenmann Core Recycler separating the organic matter and sand from hollow tine cores on athletic field turf. Figure 7. Topdressing can help dilute the paint layers left behind in the rootzone after painting field logo's each year. Along with aerification and topdressing water will continue to infiltrate into these areas.

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