Applying the Grammar of Greenkeeping

C62291821dac0dd5b7ef3b72a30cd137?s=47 Micah Woods
December 02, 2019

Applying the Grammar of Greenkeeping

I discussed, in a seminar held at Copenhagen Golf Club, the principles described in my book A Short Grammar of Greenkeeping: https://leanpub.com/short_grammar_of_greenkeeping

C62291821dac0dd5b7ef3b72a30cd137?s=128

Micah Woods

December 02, 2019
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  1. Applying the Grammar of Greenkeeping Micah Woods Chief Scientist Asian

    Turfgrass Center www.asianturfgrass.com 2 December 2019
  2. maintenance office, Toride Kokusai GC

  3. korai (Zoysia) & bentgrass greens at Toride Kokusai GC

  4. tee sign at Toride Kokusai GC

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  9. Old Course at St. Andrews

  10. Golf Course Seminar magazine, Japan

  11. “The BOOK”, photo by Jonathan Smith

  12. available at https://leanpub.com/short_grammar_of_greenkeeping

  13. Some chapters … ▶ Defining turfgrass management ▶ Two uncontrollable

    factors ▶ Water ▶ Air ▶ Soil organic matter ▶ Roots
  14. Defining turfgrass management

  15. Kashima Stadium, Japan

  16. Royal Bangkok Sports Club, Thailand

  17. creeping bentgrass, Japan

  18. bermudagrass and seashore paspalum, Thailand

  19. Greenkeeping is managing the growth rate of the grass to

    create the desired playing surface for golf.
  20. manilagrass putting green, Thailand

  21. seashore paspalum and bermudagrass, Thailand

  22. Penn A-1 creeping bentgrass, K deficiency

  23. creeping bentgrass, PGA Catalunya

  24. Two uncontrollable factors

  25. What affects growth? Growth is a function of photosynthetic light,

    plant water status, temperature, and a nutrient index.1 This can be represented as the environmental productivity index (EPI). 1Each of these factors can be represented by an index that takes a value from 0 to 1. Thus, the EPI will also have a value in the range of 0 to 1. The nutrient index is primarily a function of leaf N content.
  26. What affects growth? Growth is a function of photosynthetic light,

    plant water status, temperature, and a nutrient index.1 This can be represented as the environmental productivity index (EPI). (light)(water)(temperature)(nutrient) = EPI 1Each of these factors can be represented by an index that takes a value from 0 to 1. Thus, the EPI will also have a value in the range of 0 to 1. The nutrient index is primarily a function of leaf N content.
  27. Poa annua & kikuyugrass, Gran Canaria, November

  28. storm approaching, Bangkok, September

  29. Light — 3 terms 1. PAR – photosynthetically active radiation

    2. PPFD – photosynthetic photon flux density, measured per second 3. DLI – daily light integral, sum of PPFD from sunrise to sunset
  30. creeping bentgrass 5 cm soil temperature, Japan, July

  31. Festuca & Poa annua near Reykjavik, May 4

  32. Simplified EPI  XXXX (light)(water)(((((((( ( hhhhhhhh h (temperature)(nutrient) =

    EPI
  33. Temperature-based growth potential PACE Turf developed the temperature-based GP to

    express the actual temperature in terms of its proximity to optimum temperatures for shoot growth. GP = e−0.5(t−to var )2 where, GP = growth potential, on a scale of 0 to 1 e = 2.71828, a mathematical constant t = average temperature for a location, in celsius to = optimum temperature, 20 for C3 grass, 31 for C4 grass var = adjusts the change in GP as temperature moves away from to ; I suggest 5.5 for C3 and 7 for C4
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  40. Implications and use of GP ▶ mowing frequency ▶ fungicide

    duration ▶ heat-related stress ▶ topdressing requirement ▶ nutrient use
  41. Water in the soil

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  46. Air in the soil

  47. Novotek bermudagrass, Thailand

  48. The best playing surface will be produced when the soil

    has just enough water to keep the grass from wilting, and the remaining soil volume will be filled with air.
  49. creeping bentgrass, Kunming, China

  50. Managing soil organic matter

  51. in the USGA Green Section Record, November 2019

  52. Recommend records of … Key performance indicators ▶ Green speed

    ▶ Clipping volume Cultural inputs & conditions ▶ Nitrogen applications ▶ Sand topdressing applications ▶ Growth regulator applications ▶ Daily high & low temperature ▶ Daily precipitation Surface maintenance practices ▶ Mowing height ▶ Mowing frequency ▶ Vertical mowing ▶ Grooming ▶ Brushing ▶ Rolling
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  54. Keya GC, Fukuoka

  55. Fuji Classic GC, Yamanashi

  56. Keya GC, Fukuoka

  57. Bangsai CC, Thailand

  58. Bangsai CC, Thailand

  59. at Brookside Labs, Ohio

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  62. Roots on putting greens

  63. creeping bentgrass, Japan

  64. Golf is played on the surface, not on the roots.

  65. 4 things to increase roots on putting greens 1. Mow

    the grass as high as possible
  66. 4 things to increase roots on putting greens 1. Mow

    the grass as high as possible 2. Apply the right amount of N, at the right time
  67. 4 things to increase roots on putting greens 1. Mow

    the grass as high as possible 2. Apply the right amount of N, at the right time 3. Make sure there is plenty of air in the soil
  68. 4 things to increase roots on putting greens 1. Mow

    the grass as high as possible 2. Apply the right amount of N, at the right time 3. Make sure there is plenty of air in the soil 4. Make sure there is enough P in the soil
  69. www.asianturfgrass.com