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The ATC Doublecut with Micah Woods: Daily Summaries Delivered
by Asian Turfgrass Center
I discuss ATC blog posts, with supplementary information, stories, and the reasons why I thought the topic was worth writing about, and worth reading about. Thus, a doublecut of these topics. This covers grass selection, playability, and all the work done to create a certain type of turfgrass surface.
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- 4 days ago14 min
Stressed turf and nutrient supply
This episode discusses Grime's definition of stress as "external constraints which limit the rate of dry matter production" and how this is related to nutrient supply/demand/requirement for fine turfgrass.The post discussed is https://www.asianturfgrass.com/post/does-stressed-turf-require-more-or-fewer-nutrients/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find a suite of decision-making tools at https://www.paceturf.org/Get free ATC newsletters at https://www.asianturfgrass.com/newsletter/ Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/
- 1 weeks ago19 min
What happens to sand particle sizes after topdressing
I looked at sand particle sizes at the top of putting green rootzones, and compared those particle sizes to what is in the sand topdressing. The average results of this analysis are presented in this episode.The chart discussed is available at https://www.paceturf.org/gallery/detail/particle-size-change-from-topdressing-to-om2Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find a suite of decision-making tools at https://www.paceturf.org/Get free ATC newsletters at https://www.asianturfgrass.com/newsletter/ Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/
- 2 weeks ago28 min
Wet air, summer, and dew point depression
I looked at the temperatures and dew points for a range of cities around the world during the first month of the most recent meteorological summer. June 2026 in the northern hemisphere, and December 2025 in the southern.The blog post discussed is: https://www.asianturfgrass.com/post/first-month-of-summer-dew-point-depression/Also see the day in that month with the highest average dew point: https://www.paceturf.org/gallery/detail/first-month-of-summer-2026-maximum-dew-pointRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find a suite of decision-making tools at https://www.paceturf.org/Get free ATC newsletters at https://www.asianturfgrass.com/newsletter/ Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/
- 3 weeks ago26 min
Putting green firmness and surface organic material (OM246)
The firmness of putting greens varies with the surface organic material. More organic material in the top 2 cm (0.8 inches), and greens are softer. I discuss terminology, the relationship between firmness and organic material, and what you can do about this.The blog post discussed is https://www.asianturfgrass.com/post/om2-and-firmness/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find a suite of decision-making tools at https://www.paceturf.org/Get free ATC newsletters at https://www.asianturfgrass.com/newsletter/ Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/
- Jun 1, 202649 min
Sand topdressing matched to clipping volume, with Bjarni Hannesson
I've updated my recommendation for the sand quantity to apply for every unit of clipping volume harvested, if your goal is to keep surface organic material constant. Bjarni and I discussed topdressing by this method and the new equation that finds this sand amount.We discussed this post: https://www.asianturfgrass.com/post/sand-topdressing-ratios-clipping-volume/The PACE Turf table of sand rates based on surface organic material is at https://www.paceturf.org/public/sand-and-clipping-volumeBjarni and I discussed the spring green-up and growth from adding sand: https://www.asianturfgrass.com/post/turfgrass-mystery-the-case-of-the-greener-grass/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find a suite of decision-making tools at https://www.paceturf.org/Get free ATC newsletters at https://www.asianturfgrass.com/newsletter/ Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/
- May 25, 202630 min
Post-rain growth flush: 12 mL from water, 8 from mineralized soil N, & 2.5 from N in the rain
This is about partitioning the growth flush after a rain. What's causing that growth flush? I made some calculations, using New Forest GC in the UK as an example. The increased soil water content from a 20 mm rain, in this example, would increase daily clipping volume from 10 mL/m2 to 22 mL/m2, a 12 mL increase.The blog post discussed is https://www.asianturfgrass.com/post/nitrogen-in-rain-or-nitrogen-from-the-soil/See also https://www.asianturfgrass.com/post/how-much-n-is-in-rain-and-snow/ for information on atmospheric deposition of NRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find a suite of decision-making tools at https://www.paceturf.org/Get free ATC newsletters at https://www.asianturfgrass.com/newsletter/ Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/
- May 13, 202634 min
More air in the soil with frequent irrigation
It sounds counterintuitive at first, that you can maintain a lower average water content in the soil, and a higher air content in the soil, by applying irrigation every day. Once upon a time, I thought the way to keep soils drier and with more air was to implement deep and infrequent irrigation. The blog post discussed is: https://www.asianturfgrass.com/post/deep-and-infrequent-or-light-and-frequent-irrigation-which-is-better/I also mentioned John Jordan's research, see: https://tic.msu.edu/tgif/flink/RECNO/59354Paul Johnson article about irrigation frequency: https://usgatero.lib.msu.edu/v02/n06.pdfRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find a suite of decision-making tools at https://www.paceturf.org/Get free ATC newsletters at https://www.asianturfgrass.com/newsletter/ Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/
- May 8, 202643 min
Why you should know standard sand amounts but not necessarily copy them, with Brian Whitlark
Brian Whitlark joined me to talk about sand topdressing of putting greens and especially about sand amounts.The blog post we discussed is: https://www.asianturfgrass.com/post/standard-sand-amounts/Listen to Brian's recent appearance on the Frankly Speaking podcast: https://podcasts.apple.com/lt/podcast/firm-fast-desert-with-brian-whitlark/id1793571091?i=1000743219832OM246 calculator web app with sand quantity conversion calculator: https://asianturfgrass.shinyapps.io/om246/How to measure topdressing rates: https://youtu.be/6LurONpyg5M?si=LW4IPwzzXbVAOn-mManaging salinity in putting greens article by Brian: https://www.usga.org/content/usga/home-page/course-care/green-section-record/64/issue-08/managing-salinity-in-putting-greens.htmlTerminology of turfgrass organic matter: https://youtu.be/tMfby5xR2IM?si=8aOQ-Ju6A_cLib8MWhitlark and Thompson article from 2019 on topdressing: http://gsrpdf.lib.msu.edu/ticpdf.py?file=/article/whitlark-thompson-light-5-3-19.pdfRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Find a suite of decision-making tools at https://www.paceturf.org/Get free ATC newsletters at https://www.asianturfgrass.com/newsletter/ Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/
About The ATC Doublecut with Micah Woods
I discuss ATC blog posts, with supplementary information, stories, and the reasons why I thought the topic was worth writing about, and worth reading about. Thus, a doublecut of these topics. This covers grass selection, playability, and all the work done to create a certain type of turfgrass surface.
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