Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Critical Turfgrass Maintenance in 2020

Micah Woods
April 27, 2020

Critical Turfgrass Maintenance in 2020

Dr. Woods discussed the way he would approach turfgrass maintenance in 2020, with the assumption that funds and labor available for turfgrass maintenance will be reduced. This webinar considers ways to save money, optimize turf conditions, and prioritize work. He will use the Short Grammar of Greenkeeping as a guide to these priorities.

Micah Woods

April 27, 2020
Tweet

More Decks by Micah Woods

Other Decks in Science

Transcript

  1. Critical Turfgrass Maintenance in 2020
    Micah Woods
    27 April 2020
    Campus del Césped
    Chief Scientist
    Asian Turfgrass Center
    www.asianturfgrass.com

    View full-size slide

  2. My front steps, southern Thailand

    View full-size slide

  3. Today’s topics
    1. Fundamental turfgrass management
    2. Growth rate
    3. Fertilizer
    4. Keeping grass alive
    5. Cost of maintenance
    6. Mowing

    View full-size slide

  4. Keep safe at work

    View full-size slide

  5. Fundamental turfgrass
    management

    View full-size slide

  6. Light: at least 6 hours per day
    Air: 20% or more, by volume, in the soil
    Water: keep grass alive
    Nutrients: to produce growth to match traffic
    Pest control: as you can afford
    Mowing: to match growth rate

    View full-size slide

  7. Proactive maintenance
    proactive, from the OED
    “creating or controlling a situation by taking the initiative and
    anticipating events or problems … innovative, tending to make
    things happen.”

    View full-size slide

  8. Reactive maintenance
    reactive, from the OED
    “responds or reacts to a situation, event, etc., especially that
    reacts to existing circumstances, rather than anticipating or
    initiating new ones.”

    View full-size slide

  9. Old Course, St. Andrews

    View full-size slide

  10. Measuring clipping volume

    View full-size slide

  11. Don’t apply fertilizer unless you need the
    grass to grow more.

    View full-size slide

  12. If you must apply, estimate plant use, and
    don’t apply more than that.

    View full-size slide

  13. This example might surprise you.
    Using 2019 La Moraleja temperatures.
    N: annual N use estimated at 17 g N/m2
    P: 2 g P/m2 (or 5 g P
    2
    O
    5
    )
    K: 8 g K/m2 (or 10 g K
    2
    O)
    Ca: 2 g Ca/m2
    Mg: 0.7 g Mg/m2
    Fe: 0.04 g Fe/m2

    View full-size slide

  14. Consider soil testing for even more efficiency

    View full-size slide

  15. Keeping grass alive

    View full-size slide

  16. Irrigation
    It depends on the course situation, but you might be able to
    let the grass go dormant.
    If not, irrigate to produce the desired growth rate.

    View full-size slide

  17. Royal Hua Hin GC, Thailand

    View full-size slide

  18. Sritrang GC, Thailand

    View full-size slide

  19. Soil surfactants
    If you can afford it, soil surfactants (wetting agents) can help
    with improved turf performance when less water is applied.
    They can help with soil rewetting too.

    View full-size slide

  20. My personal thought, perhaps influenced by the part of the
    world I’m in, is that weeds are worse than diseases or insects.
    I would not be too worried about diseases or insects, and
    would cut back on applications to control those. I would try to
    control weeds as I find them more difficult to eradicate in the
    future.

    View full-size slide

  21. Prioritize areas if you must.

    View full-size slide

  22. Cost of maintenance

    View full-size slide

  23. Nutrient cost
    Remember that example we worked through for nutrient
    requirements?
    N: That annual N amount (100% of grass use), supplied
    from urea, would cost about €126/ha.
    P: That annual P amount, supplied from diammonium
    phosphate, would cost about €56/ha.
    K: That annual K amount, supplied from potassium
    chloride, would cost about €62/ha.

    View full-size slide

  24. Nutrient cost
    Cost to supply 100% of grass N, P, and K use
    €244 per hectare per year

    View full-size slide

  25. What’s a “soil conditioner”?
    A typical putting green soil, in 1 ha, has 22,500 kg of humus in
    the top 10 cm!
    Grass growth produces another 750 kg/ha of humus every
    year.

    View full-size slide

  26. Set mowing height as high as possible

    View full-size slide

  27. • use plant growth regulators if you have the budget
    • don’t collect clippings all the time
    • remove extra tee markers, other accessories, for easier
    mowing

    View full-size slide

  28. Growth rate that is under control will save
    a lot of mowing requirement and save
    money.

    View full-size slide

  29. Extras
    If you have a chance, take the opportunity to:
    • Get some weeds under control
    • Let the Poa annua die
    • Solve some shade problems
    • Remove organic matter from the soil
    • Add sand or otherwise modify surface conditions

    View full-size slide

  30. We’ve discussed
    1. Fundamental turfgrass management
    2. Growth rate
    3. Fertilizer
    4. Keeping grass alive
    5. Cost of maintenance
    6. Mowing

    View full-size slide

  31. www.asianturfgrass.com

    View full-size slide