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Playing with numbers

C62291821dac0dd5b7ef3b72a30cd137?s=47 Micah Woods
February 27, 2015

Playing with numbers

This presentation was given as part of the Sustainable Turfgrass Management in Asia 2015 conference at Pattaya, Thailand. The topic? Objective assessment of putting green surfaces.

What's the point of data collection? It shouldn't be just playing with numbers. One can collect reams of data about playing conditions. On their own, the data aren't useful. However, when considered in terms of how the current conditions compare to the desired conditions, and with an understanding of what maintenance work can be done to move the conditions closer to the desired ones, the data become quite useful.


Micah Woods

February 27, 2015


  1. Playing with numbers Micah Woods Chief Scientist | Asian Turfgrass

    Center Handout: Sustainable Turfgrass Management in Asia 2015 Pattaya, Thailand 9 March 2015
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  5. But what is it good for? The data are only

    useful when they can be used as a decision making tool. • Identify a target range. • Learn what affects green speed, surface hardness, and soil moisture. • Use data and that knowledge to work more efficiently and improve playing conditions. fine fescue England
  6. Green speed, measured with a stimpmeter, as ball roll distance

    in feet. seashore paspalum Thailand
  7. None
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  9. Modify the green speed by adjusting … - the mowing

    height - frequency of rolling - N rate - plant water status - grass species
  10. Lightweight rolling is very effective in increasing green speed. fine

    fescue Scotland
  11. Surface hardness, which I've measured with a Clegg hammer as

    Gmax. seashore paspalum Vietnam
  12. None
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  14. Modify the green hardness by adjusting … - soil organic

    matter - soil moisture content - sand topdressing - scarification - coring - other types of cultivation
  15. Sand topdressing is an important practice to control surface hardness.

    bermudagrass Thailand
  16. Volumetric water content measured with a Theta-probe or TDR-300 in

    %. bermudagrass Singapore
  17. None
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  19. Modify the soil moisture by adjusting … - irrigation -

    soil organic matter / sand topdressing - drainage
  20. When organic matter accumulates, soil moisture can be high, with

    soft surfaces. seashore paspalum Hong Kong
  21. To get better control of soil water, manage the accumulation

    of soil organic matter. seashore paspalum Hong Kong
  22. None
  23. Performance data can be used to improve playing conditions and

    to prioritize the maintenance work. For more information, see: bermudagrass New Delhi