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Sub-Surface Requirements for a High Performance Bowls Green

Perfect Soil

The Sub-Surface Requirements for a High Performance Bowls Green are pretty much set in stone. Get these right and you’re well on your way to a Performance Bowling Green.

First of all then, have a look at the diagram above. This represents the ideal make up of a performance bowls green’s rootzone.

Do you see anything remarkable?

Well, when I explain this to my clients for the first time, many of them are surprised to say the least.

If you look closely at the diagram you will see that the ideal green will be 50% nothing; yes space, just air cavities within the soil. Now, of course I am not going to tell you to get rid of half your green to achieve this, but next week I am going to share with you a program whereby you can get close to this ideal situation of ½ solids and ½ space in your green.

Of course the space isn’t just nothing; half of the space consists of “micro-pores” and half is “macro-pores”. Put simply the micro-pores contain water and the macro-pores contain air. This is very important to understand and is one of the least understood concepts within sportsturf maintenance.

The “nothing” element of the ideal green is the most important factor to get right, because this is where we get the balance between speedy drainage and good growing conditions and it is due to a fundamental misunderstanding of this concept that a very large number of UK bowling greens are in poor condition and can’t be prepared for performance consistently. The only saving grace for these greens is that the UK summer is also very inconsistent and sometimes acts in their favour; so that we occasionally get a very good season’s bowling when the “green has never been better”. This is a false reading in most cases and the problem is exacerbated by the club attributing this success to the latest fad program.

The green which has a well balanced soil as described and illustrated above will naturally:

  1. sustain a firm, fast surface with a minimal input maintenance program
  2. sustain a healthy sward of fine grasses
  3. sustain a high, year-round population of soil microbes
  4. provide a natural cycle of nutrient release from soil organisms and micro-organisms (microbes) working on fresh organic matter (thatch).
  5. resist compaction and therefore resist:
  6. shallow rooting
  7. annual meadow grass ingress
  8. flooding and puddling
  9. head skinning
  10. retain the optimum amount of soil water for healthy growth with minimum requirement for artificial irrigation.
  11. drain reasonably quickly after excessive rainfall.
  12. retain the optimum amount of plant available nutrition
  13. sustain a soil pH within the optimum range for fine turf
  14. resist attack from fungal diseases
  15. resist the onset of Localised Dry Patch and other soil and turf disorders
  16. maintain a tight, dense sward with an upright growth habit which will reduce ingress of moss, weeds and weed grasses.
  17. resist localised settlement and bumpiness due to excessive thatch and erratic thatch decomposition

Comprehensive action plan for achieving the above included in the book below. It costs less than a bag of cheap fertiliser.

Getting Bowls Green Irrigation Right

Bowls clubs are often divided on whether to water the green or not. When I visit clubs to advise on this, they are generally under-watering their greens.

This results in poor surfaces, especially when a green is still within the renovation phase as described in my book Performance Bowling Greens.

You can think of Soil Moisture Deficit in much the same way as a negative balance in your bank account.

Soil Water Balance Management…

…is almost unheard of within bowling circles or certainly the bowling circles I have been involved with but is a critical part of the management program to get right for high performance and deals with the management or Read more

Irrigation, how much is enough?

Irrigation, how much is enough?
irrigation management is critical but straight forward

Irrigation is on everyone’s mind at the moment, but how much is enough?

As a general rule greens lose approximately 3-4mm of moisture per dry day to evapo-transpiration, although this can vary with conditions; that’s approximately 25mm or 1 inch per week.

Again a very general rule is that many of the more popular automatic sprinkler systems will apply around 1mm of water for every 2 minutes of run time.

So again as a general rule to replace a week’s worth of losses you should be running the sprinklers for around 50 minutes in the week.

Now I will add a qualification or four to that:

  1. requirements can vary widely depending on location and conditions.
  2. don’t apply light applications on a nightly basis, try to group these into heavier and less frequent applications for best effect.
  3. try to move to a water balance sheet type system to manage irrigation more accurately…it will pay off quickly
  4. don’t rely on a typical bowling green irrigation system to apply water evenly or in sufficient volume…always check and measure what you are doing.

Irrigation management and water balance sheets in my book Performance Bowling Greens.

any questions please ask!

Localised Dry Patch still causing problems in autumn

Localised Dry Patch causing seed problems

Over-seeding of bowling greens seems like a straight-forward task; you put the seed on and the green’s bare areas recover.

However, one of our regular readers has raised an interesting question today about over-seeding and it is by no means isolated.

After over-seeding the green, the seed has taken well on the parts of the green that least needed it and nothing has happened on the barest areas of the green where the new grass is most needed!

This is unfortunately a very common problem and is usually related to our old friend Localised Dry Patch (LDP).

The barest areas of the green going into the autumn are usually the spots that have been affected by LDP and as such are bare due to lack of soil moisture.

This means that quite a lot of preparation is required before seeding and this might even include heavy watering to get the soil to hold enough moisture to get the seed off to a good start.

It might be necessary to do some light cultivation with a Sarrell roller or hand cultivator and, if the underlying soil is still dry and water repellent, a wetting agent would also help.

The main problem is that we are now a bit late for further seeding, although this largely depends on the weather and temperature. I have seeded successfully up to Christmas in the past, but success with this is obviously dependent on the remainder of the winter. Certainly if we were to get another one like last year, even early seedings will struggle to survive the winter.

If anybody is still having trouble getting grass cover on the green after overseeding please feel free to contribute ideas, tips or questions to the site.