Fine Turgrass Management

Fine Turgrass Management

Steve Cook, CGCS, MG - Director of Agronomy

Tuesday, July 19, 2016

Monday Maintenance

Here are the Member Service items we completed on Monday when both courses were closed:

  • South greens/tees/fairways sprayed with fungicide
  • Topdress North/South greens
  • Apply "grub" control on South green banks
  • Sand added to #3 South greenside bunkers
  • Trimmed all South bunkers
  • Verify all greenside irrigation heads for proper rotation
  • All routine mowing
  • North greens/tees sprayed with fungicide
  • Hand water bunker capes North Course
  • Tree pruning/maintenance/removals
  • Driving range maintenance

Thursday, May 12, 2016

Weather Averages

Average precipitation in April - 2.76"
Precipitation at Oakland Hills April 2016 - 2.76"

May has started off cool and wet, 1.31" has been recorded here since May 1.

Monday, May 9, 2016

Update Monday, May 9th

The South greens look great only 5 days after aerification. The North greens are a little slower to recover, but should be good for Men's League this week.

Weather prevented us from finishing South fairway aerification last week, we'll finish that today.

Herbicide applications are complete for the spring and will resume during the optimal window for weed control, October.

Monday, April 25, 2016

Growing Degree Days

Thank you Purdue and MSU for this explanation, which I think is pretty good:

What is a Growing Degree Day (GDD)? A growing degree day (GDD) is a method to track the heat units that have accumulated and are needed for plant growth and development. The formula for calculating GDD is:
GDD = ((max temperature °F + min temperature °F) ÷ 2) - base temperature °F, where the base temperature is normally either 22, 32 or 50 °F but varies based on the model.

For example, if the high today was 74°F and the low was 52°F and we used a base temperature of 50°F, our calculation would be, GDD= ((74°F + 52°F) ÷ 2) - 50°F = 13 

Models that help us predict plant development use accumulated GDD which is simply adding the GDD calculated each day and determining how many GDD units have accumulated thus far.

In some cases accumulated GDD can be used to monitor when weeds might germinate or flower or when grasses might produce a seedhead while in other cases accumulated GDD can be used to help optimize application timing such as with preemergence crabgrass applications or the selection of amines or esters for spring broadleaf applications. Research into plant development and optimal herbicide application timing has determined a window of accumulated GDD needed to best predict when to time these applications or when these events might occur.

Friday, April 22, 2016


North greens are healing nicely. We can focus a little more attention on course detailing - bunkers etc. - now that aerification on the North is finished.


Thursday, April 21, 2016

Aerification Update

The North Course aerification of greens, tees and fairways went great! Perfect weather - dry, low humidity and 65 deg - helped make this process flow perfectly. Thanks to the staff for the long hours and attention to details.

Monday, April 18, 2016

North Aerification


CORE AERATION is one of the “dirty” words of golf course maintenance. With a golf season of seven months, many would question the necessity of disrupting play each spring and fall.

An important purpose behind core aerification is the removal of unwanted organic matter, allowing roots to grow. 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 rule of thumb for what percentage of surface area should be impacted each year. It would be safe to say however that it is difficult to “over aerify”. The USGA suggests that 15-20% of the surface should be aerified each year. This would dictate a larger hole size – and closer spacing between holes during the aerification process – both spring and fall. Changing from a 1/4” tine to a 1/2” tine increases the surface area impacted by four times. Using a 5/8” tine versus a 1/2” tine increases the surface area impacted by approximately 50%.

How long after aerification before the greens are back to normal?

With cooperative weather, the healing process will take 10 - 14 days. Extra fertilizer and water are applied at this time to expedite recovery.

Wednesday, April 13, 2016


.70" over the weekend left the golf courses very wet, particularly the South. We should be able to start mowing today and tomorrow and anticipate allowing carts on Saturday.

Saturday, April 2, 2016


.25" on March 31st and .66" on April 1st

Total for March = 4.38"

The forecast is still slow and I would not anticipate much work on the golf course this week.

Monday, March 28, 2016

Monday, March 28

.47" last night.

4.03" for the month of March in 2016. The average precip for March is 2.17".

Carts will be allowed on the North tomorrow, weather permitting. The South Course will open to walkers only - no carts - on Wednesday the 30th.

5 green south 1920's