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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

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  1. Critical Turfgrass Maintenance in 2020 Micah Woods 27 April 2020

    Campus del Césped Chief Scientist Asian Turfgrass Center www.asianturfgrass.com
  2. Today’s topics 1. Fundamental turfgrass management 2. Growth rate 3.

    Fertilizer 4. Keeping grass alive 5. Cost of maintenance 6. Mowing
  3. 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
  4. 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.”
  5. 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.”
  6. 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
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. Nutrient cost Cost to supply 100% of grass N, P,

    and K use €244 per hectare per year
  12. 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.
  13. • 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
  14. Growth rate that is under control will save a lot

    of mowing requirement and save money.
  15. 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
  16. We’ve discussed 1. Fundamental turfgrass management 2. Growth rate 3.

    Fertilizer 4. Keeping grass alive 5. Cost of maintenance 6. Mowing