With spring right around the corner, it is time to start shifting away from our winter related tasks to more turf related jobs in an effort to prepare everything for spring. A big part of that program for our Bentgrass greens at Irving Park begins with aerification.
"WHY AERIFY?" CORE AERATION is one of the “dirty” words of golf course maintenance. With a busy golf season of around eight months in our area of the world, many would question the necessity of disrupting play each year in the spring and the fall on Bentgrass greens.
An important purpose behind core aerification is the removal of unwanted organic matter, allowing improved growing conditions for the roots. With a healthier root system heading into the golf season, the grass plant is better able to withstand the stress of traffic. Aeration also relieves compaction, promotes air exchange and helps with water infiltration.
How much aerification is enough?
There is no specific rule of thumb for what percentage of surface area should be impacted each year. It would be safe to say however that it would be difficult to “over aerify” if plant health was the only factor. The USGA suggests that 15-20% of the surface should be aerified each year. Our program of a 3/8” tine in late winter, a 1/2” tine in late spring and early fall comes very close to achieving the USGA objective of 20% annual surface removal.
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3/8"tine on a 2.5 " spacing |
How long after aerification before the greens are back to normal?
With cooperative weather, the healing process will take 28 days in late winter and 21 days in spring and fall to return the greens to optimal putting condition. Extra fertilizer and water are applied at this time to expedite recovery." Smaller tines are used in late winter to speed the recovery during what is typically a slower growing time of the year.
Weed Control
Springtime is also the time of year where the turfgrass is treated with preventative summer weed control products. Ideally these treatments are applied beginning in late February with a completion date of no later than March 15. The timing of these treatments is primarily dependent upon soil temperatures with certain summer weeds such as Crabgrass germinating when soil temperatures approach 60 degrees. Between the two courses we treat over 200 acres of turf each spring and depending on weather conditions these treatments can take anywhere between 2-3 weeks from start to finish.
Winter Damage Update
While we expect a certain amount damage on the warm season turfgrass each year coming out of winter, some years can certainly be worse than others. While we did experience a very cold month of January it does appear this year won't be witness to any widespread turf loss. The Farm ultradwarf greens appear to be very healthy as we are currently mowing them several times a week and getting more clippings than normal for this time of the year. My biggest concern coming out of January was more so in the fairways and roughs where growing conditions such as compaction, shade and poor drainage make the turf more susceptible to winter extremes. After exploring several of these areas prone to damage we are seeing a good amount of healthy white live stolons, which is a very good indicator that the turf will be fine once it breaks dormancy. While we still have several more weeks before we are in the clear things are looking good for a normal spring transition.
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White/Tan Succulent Healthy Stolon from Shady/Wet Area Prone to Winterkill |