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What kind of soils produce the best turf today?

C62291821dac0dd5b7ef3b72a30cd137?s=47 Micah Woods
November 08, 2017

What kind of soils produce the best turf today?

My presentation slides that summarize some results from the Global Soil Survey (GSS). This presentation was delivered at the XVI Congresso APG in Tavira. The GSS samples are from good-performing turf around the world. These soil conditions are representative of those producing good turf today.

C62291821dac0dd5b7ef3b72a30cd137?s=128

Micah Woods

November 08, 2017
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Transcript

  1. What kind of soils produce the best turf today? Micah

    Woods Chief Scientist Asian Turfgrass Center www.asianturfgrass.com November 8, 2017
  2. 1. Which data will we look at? 2. How will

    we look at the data? 3. Implications for pH, OM, K, P, Ca, Mg, salinity, micronutrients, and N
  3. Which data will we look at?

  4. None
  5. GSS kit, good performing turf

  6. GSS sample locations, 2013 to 2016

  7. Samples collected from good performing turf

  8. How will we look at the data?

  9. Ile aux Cerfs Golf Club, Mauritius

  10. 87 92 86 81 87 83 86 91 86 84

    82 84 86 88 90 92 18 hole score 10 random golf scores
  11. 82 84 86 88 90 92 18 hole score Dotplot

    of 10 random golf scores
  12. 0 1 2 3 80 82 84 86 88 90

    92 18 hole score count bin width = 1 Histogram of 10 random golf scores
  13. 0 1 2 3 4 5 80 82 84 86

    88 90 92 94 18 hole score count bin width = 3 Histogram of 10 random golf scores
  14. 87 92 86 81 87 83 86 91 86 84

    88 86 81 84 87 86 87 80 88 81 81 89 87 89 75 81 86 85 87 81 90 82 83 84 87 94 84 92 81 85 88 93 80 83 82 81 92 85 79 89 81 83 87 80 96 79 83 82 87 84 86 82 85 89 88 87 81 76 86 84 91 82 84 81 74 78 84 81 83 91 88 87 91 84 86 88 83 87 87 87 86 89 81 78 82 78 91 89 90 83 74 76 78 80 82 84 86 88 90 92 94 96 18 hole score 100 random golf scores
  15. 74 76 78 80 82 84 86 88 90 92

    94 96 18 hole score Dotplot of 100 random golf scores
  16. 0 5 10 74 76 78 80 82 84 86

    88 90 92 94 96 18 hole score count bin width = 1 Histogram of 100 random golf scores
  17. 0 10 20 30 74 76 78 80 82 84

    86 88 90 92 94 96 98 18 hole score count bin width = 3 Histogram of 100 random golf scores
  18. None
  19. Implications for pH, OM, K, P, Ca, Mg, etc.

  20. median: 6.5 min: 4.6, max: 8.2 0 5 10 15

    20 25 5 6 7 8 Soil pH in 1:1 H2O count pH
  21. median: 1.76 min: 0.17, max: 10.15 0 5 10 15

    20 0.0 2.5 5.0 7.5 10.0 Soil organic ma er percent by weight count OM, all samples Loss on ignition at 360 C
  22. median: 1.44 min: 0.17, max: 4.69 0.0 2.5 5.0 7.5

    10.0 0 1 2 3 4 Soil organic ma er percent by weight count OM, pu ing green samples Loss on ignition at 360 C
  23. Soil organic matter is about 5% N. From 1 to

    4% of that N is expected to become plant available each year. That gives an estimate of about 20 kg N/ha expected release each year from the top 10 cm of soil for each 1% of soil organic matter.
  24. median: 60 min: 10, max: 296 0 5 10 15

    20 25 0 100 200 300 Soil K in ppm count Potassium Mehlich 3 extraction
  25. median: 60 min: 10, max: 296 86 percent below 0

    5 10 15 20 25 0 100 200 300 Soil K in ppm count Potassium Mehlich 3 extraction
  26. Soil K about 60 ppm

  27. median: 68 min: 6, max: 450 38 percent below 0

    10 20 30 0 100 200 300 400 Soil P in ppm count Phosphorus Mehlich 3 extraction
  28. median: 585.5 min: 125, max: 2844 58 percent below 0

    5 10 15 20 0 1000 2000 3000 Soil Ca in ppm count Calcium Mehlich 3 extraction, calcareous samples removed
  29. median: 74 min: 23, max: 516 79 percent below 0

    10 20 30 0 100 200 300 400 500 Soil Mg in ppm count Magnesium Mehlich 3 extraction
  30. median: 0.66 min: 0.5, max: 1.5 100 percent below 0

    10 20 30 40 0.0 0.5 1.0 1.5 2.0 Soil salinity (EC) in dS/m count Soil salinity saturated paste equivalent from 1:2 soil:water
  31. median: 6.7 min: 0, max: 26 98 percent below 0

    5 10 15 20 25 0 10 20 Nitrate + ammonium in ppm count Available nitrogen
  32. Micronutrient median values • Iron: 198 ppm • Manganese: 27

    ppm • Zinc: 6 ppm • Copper: 3 ppm • Boron: 0.4 ppm
  33. For more, please see www.asianturfgrass.com or @asianturfgrass on Twitter.