The ATC Doublecut with Micah Woods

Jim Huntoon joined me from Horry-Georgetown Technical College to discuss overseeding and the hows and whys of this common practice on warm-season turf that goes dormant in winter. We discussed these two blog posts:- https://www.asianturfgrass.com/post/optimum-overseeding-time-windows/- https://www.asianturfgrass.com/post/zoysia-beats-bermuda-on-some-greens/You can see my slides and handout from the Palmetto GCSA Education Meeting at this link: https://www.asianturfgrass.com/seminar/palmetto-2024/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/Turfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter

Maggie Reiter joined me to reminisce about the grasses one can find at the back of the 7th green at Pebble Beach Golf Links, to consider soil test results for lawns, what the biggest problems are on lawns and whether solutions exists, and much more.Maggie is a Data Scientist at Sunday, https://www.getsunday.com/The blog post with the photo of grasses at Pebble Beach is: https://www.asianturfgrass.com/post/flights-turf-photos/We discussed EPA ecoregion maps, which you can read more about at https://www.epa.gov/eco-research/ecoregions and can see the especially detailed ones at https://www.epa.gov/eco-research/level-iii-and-iv-ecoregions-continental-united-statesThe original MLSN guidelines, first presented at the Bouyoucos Conference in 2012, are available at: https://www.paceturf.org/PTRI/Documents/201408_stowell_woods_mlsn.pdfMLSN calculations for micronutrients are here: https://www.paceturf.org/memberedition/mlsn-for-micronutrientsThe Carrow et al. article from 2004 on SLAN ranges is available at https://www.files.asianturfgrass.com/clarify3.pdfSoil test lab tour at Brookside Labs: https://youtu.be/PyL2bfdiBdERead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/Turfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

This is a follow-up to the episode last week when I mentioned that I was looking at snow outside, that the light would be ample for growth, but the temperatures were below freezing and thus temperature was limiting the growth. I discuss the new blog post that shows those light data.An example of ample DLI: https://www.asianturfgrass.com/post/an-example-of-ample-dli/The USGA Green Section Record with the fine podcast, frost research, Pat Jones article, and much more: https://www.asianturfgrass.com/post/breaking-the-ice/The  @TurfgrassEpistemology  episode with Travis Shaddox on K and soil testing: https://www.youtube.com/live/aSZwz75aIig?si=Ip9JcBo41Poy_RasRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/Turfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter

The growth potential converts air temperature to a 0 to 1 (or 0 to 100%) scale. Of course, there are a lot more things that affect actual growth, including light, nitrogen, and water. I discuss these and why I'm not so convinced that adding a light factor to GP makes it more useful.The blog post discussed here is https://www.asianturfgrass.com/post/light-and-gp-again/This calculator finds full sun PPFD and DLI for any location on any date: https://asianturfgrass.shinyapps.io/ppfd_by_time/Park Nobel's environmental productivity index is described in this article: https://esajournals.onlinelibrary.wiley.com/doi/abs/10.2307/1938497It's also mentioned in his text book Physiochemical and Environmental Plant Physiology: https://www.sciencedirect.com/book/9780128191460/physicochemical-and-environmental-plant-physiologyTravis Shaddox's Turfgrass Epistemology channel: https://www.youtube.com/@TurfgrassEpistemologyRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/Turfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter

This episode goes through a lot of updates from both the ATC and the PACE Turf websites. Topics discussed include OM246, the problem with frequent soil testing, the problem when getting soil tests done by some fertilizer companies, normal N content of grass leaves, and coefficient of uniformity (Cu) of rootzone sands.More information and and decision-making tools at https://www.paceturf.org/, this episode's sponsor.Blog posts discussed include:https://www.asianturfgrass.com/post/new-om246-video-script/ which corresponds with this video https://youtu.be/Tc8dcBBt1zchttps://www.asianturfgrass.com/post/nutrient-harvest-turf-math/https://www.asianturfgrass.com/post/testing-mlsn/https://www.asianturfgrass.com/post/couple-problems-with-year-round-soil-nutrient-analysis/https://www.asianturfgrass.com/post/five-down-one-to-go/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter

Adam Moeller joined me to discuss how to manage greens in 2024. We talked about his research at Purdue University on sand and bentgrass and coring and N rates, and about clipping volume and OM246 testing and how we might manage turf and look at sands today.This post got the Doublecut introduction, about how to figure out an estimate of N harvest from clippings, and how to systematically adjust N rate based on turfgrass growth ratio: https://www.asianturfgrass.com/post/growth-ratio-nitrogen-harvest-and-fertilizer-adjustment/Adam's website is https://www.moellerconsultingllc.com/He posted this chart on X showing a particle size distribution curve: https://x.com/AdamMoeller/status/1756301012392960446Here's another example of a curve from the PACE Turf gallery: https://www.paceturf.org/gallery/detail/s-curve-with-sand-particle-size-of-topdressing-sand-and-om2-sandWe discussed the 2016 article with Todd Lowe on Managing Organic Matter in Putting Greens and the sand topdressing recommendations in that article: https://gsrpdf.lib.msu.edu/?file=/article/moeller-lowe-managing-11-4-16.pdfRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/Turfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter

Brian joined me to discuss his recommended soil sampling strategy for an 18 hole golf course. We also discussed what he teaches in a 2 hour GCSAA seminar on physical testing.Mavis Consulting website with lots of resources: http://mavisconsulting.com/This blog post on soil sampling got the Doublecut treatment: https://www.asianturfgrass.com/post/composite-samples-1/Brian's article on turf testing techniques from GCM magazine: https://www.gcmonline.com/course/maintenance/news/turf-testing-techniquesRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

The 2018 article by Bryan and Tyler Hopkins, "Carbon: the next frontier in fertilization?" concludes that we "should not be fertilizing with carbon." Bryan joined me to discuss this article.The blog post about their article remains one of the top viewed on the ATC website, six years after publication: https://www.asianturfgrass.com/post/is-carbon-the-next-frontier-in-fertilization/Original article from Crops & Soils: https://doi.org/10.2134/cs2018.51.0307My calculation of how much carbon is in the soil: https://www.asianturfgrass.com/post/how-much-carbon-and-humus-are-in-the-soil/Dr. Carrow's calculations of humic material in the soil: https://www.asianturfgrass.com/post/asking-the-right-questions/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/Turfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter

Zoysiagrass can seed year round when the conditions are right. In this episode, I discuss what those conditions are, share some tools for getting a site-specific sand topdressing estimate, describe the reshuffling of top posts on the ATC website, and discuss using a line laser to measure the effective height of cut.I have also recently been the guest on The Tie podcast and on The Talking Greenkeeper. Listen to those episodes and then let me know if you think the philosophy of greenkeeping I discussed makes any sense.The Tie: https://podcasts.apple.com/us/podcast/micah-woods-leading-turf-grass-scientist/id1583596139?i=1000643868377The Talking Greenkeeper: https://podcasts.apple.com/us/podcast/the-micah-woods-annual-holiday-special/id1435947281?i=1000639222356Zoysia seeds: https://www.asianturfgrass.com/post/daylength-temperature-and-zoysia-seeds/Annual sand topdressing amounts: https://www.asianturfgrass.com/post/annual-sand-topdressing-amounts/Top post reshuffle: https://www.asianturfgrass.com/post/the-annual-reshuffling-of-top-posts/Effective cutting height with laser measurement: https://www.asianturfgrass.com/post/measuring-effective-cutting-height-with-a-laser/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://www.asianturfgrass.com/newsletter/Turfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

Joe Gulotti, The Talking Greenkeeper, joined me to discuss the ATC blog posts that received the fewest views in 2023. We give these topics one more chance, while talking about quality of ball roll, playability, fertilizer, surface firmness, seminars, translation, and much more.The blog post with these 10 blog post "bombs" is https://www.asianturfgrass.com/post/ten-posts-no-one-read-2023/Joe's The Talking Greenkeeper podcast is at https://podcasts.apple.com/us/podcast/the-talking-greenkeeper/id1435947281Our "Holiday Special" episode is at https://podcasts.apple.com/us/podcast/the-micah-woods-annual-holiday-special/id1435947281?i=1000639222356Joe's conversation with Matt Shaffer is at https://podcasts.apple.com/us/podcast/matt-shaffer/id1435947281?i=1000642712369Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

With Google Analytics I can check the pages on the ATC website that get the most views. These were the ten posts from 2023 that got the most pageviews.These posts are listed, with direct links to each, at https://www.asianturfgrass.com/post/ten-posts-no-one-read-2023/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

I looked through my "Flights and favorite turf photos" post to see what I learned, or what I was reminded of, through these photos. I discuss N rate, grass species, dormancy, traffic, leaf area, crew size, Poa annua, pesticides, and a lot more.This is the post I discussed: https://www.asianturfgrass.com/post/flights-favorite-turf-photos-2023/I mentioned my book "A Short Grammar of Greenkeeping" https://leanpub.com/short_grammar_of_greenkeepingHere are some related videos:- About spouter sprayer https://youtube.com/shorts/MvAyLk-ZQnU?feature=share- About Australian Open volunteer experience https://youtu.be/RCaf5ByHW2Y- The Tour de Fungus https://youtube.com/shorts/x36-KkZ_VFo?feature=share- Botanical walk (tropical beachgrass) https://youtu.be/divHyrH_iPs- Botanical walk (absence of seashore paspalum by the sea)  https://youtu.be/KOo6yEgi5igRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

In 2018, I delivered four presentations/classes at the Continue to Learn education conference in Harrogate, England. Deb Burnett and Sami Strutt from BIGGA joined me to discuss how an education program gets put together and evaluated.The Doublecut post was: https://www.asianturfgrass.com/post/four-presentations-at-btme/BIGGA website: https://www.bigga.org.uk/BTME website: https://www.btme.org.uk/Continue to Learn website: https://www.btme.org.uk/continue-to-learn.htmlRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

Chris Tritabaugh joined me to discuss sand topdressing, a long-running conversation we've been having with Dr. John Kaminski, the quantities of sand and N that are recommended vs. the amounts that seem to be required in modern turf maintenance, and much more.We discussed this post from the ATC website about nitrogen, coring, and sand: https://www.asianturfgrass.com/post/i-was-surprised-to-read-this-about-nitrogen-coring-and-sand/Chris and I spoke about a similar topic in this ATC Office Hours episode: https://www.youtube.com/watch?v=atipVSlT1wsYou can read Chris's Substack newsletter at https://ctunderscoreturf.substack.com?utm_source=navbar&utm_medium=web&r=dakt8Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

Janne Lehto from Hirsala Golf joined me to discuss robotic automowers. Hirsala Golf currently has a fleet of 36 machines, mowing all fairways and 75% of the rough with these autonomous mowers. We discussed mowing heights, some of the interesting benefits that come with using these types of machines, and discussed a few drawbacks.Find Janne on Intstagram at https://www.instagram.com/gcc_jannenestori/His website is https://turfgrassmastery.fi/Janne and I talked about automowers in this Cart Rides episode: https://youtu.be/efFGhteKiu0?si=klmO-SxhZvYjJDjGWe discussed the research about improved turf quality and energy savings when using automowers on manilagrass turf in Italy: https://www.asianturfgrass.com/post/produced-higher-quality-turf-autonomous/We also discussed the source of electricity and C emissions: https://www.asianturfgrass.com/post/mowing-electricity-energy/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

I talked about some recent blog posts, including updated #OM246 sampling instructions, there is no such thing as an MLSN nitrogen rate, soil samples cannot dry too much, and more.Links to these posts are:- https://www.asianturfgrass.com/post/mlsn-is-not-gp/- PACE climate appraisal form https://www.paceturf.org/journal/climate- https://www.asianturfgrass.com/post/updated-om246-sampling-instructions/- https://www.asianturfgrass.com/post/seminars-and-conferences-past-present-and-future/- https://www.asianturfgrass.com/post/how-long-can-soil-samples-dry/- https://www.asianturfgrass.com/post/quantitative-vs-qualitativea-little-goes-a-long-way/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

Can soil surfactant (wetting agent) applications be scheduled based on site temperatures? Can a growing degree day model work for this? Dr. Bill Kreuser, president of Greenkeeper, joined me to discuss his exciting progress with this research.- ATC blog post on what wetting agents really do: https://www.asianturfgrass.com/post/what-do-wetting-agents-really-do/- Greenkeeper website post on this new era in wetting agent programming: https://www.greenkeeperapp.com/marketing/index.php/a-new-era-in-wetting-agent-programming/- PACE Turf video on the water droplet penetration test: https://youtu.be/ujtvjFvKPJk?si=cHEUyCFhrDkyH4QE- Birdie dances including two from Mammoth Dunes, thanks to Bill for the fine photography https://www.micahwoods.com/post/evolution-style/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

Lake Karrinyup Country Club in Perth, Western Australia has creeping bentgrass greens and sometimes sees high temperatures over 40 °C. Course superintendent Fraser Brown joined me to discuss how he and the maintenance team manage the grass in this year-round golfing climate.Find Fraser on X at https://twitter.com/FraserJBrown_Read the ATM profile "From Kingussie to Karrinyup" about Fraser: https://files.asianturfgrass.com/2023_atm_fraser_brown.pdfWe discussed growing bentgrass in tropical temperatures: https://www.asianturfgrass.com/post/bentgrass-tropical-temperatures/We also discussed being reactive and proactive in greenkeeping: https://www.asianturfgrass.com/post/is-reactive-better-than-proactive/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

I spoke with Michael Bekken about normal nitrogen rates, why they vary so much, why that matters, what a normal N rate linked to growth potential (GP) might be, and greenhouse gas emissions from turfgrass maintenance.We talked about:- how to keep up with turf info from ATC and PACE Turf, https://www.asianturfgrass.com/post/whats-the-best-way-to-keep-up/- ATC newsletters, https://www.asianturfgrass.com/newsletter/- Bekken et al. on golf course nitrogen use efficiency: https://doi.org/10.1002/glr2.12049- Bekken et al. on  greenhouse gas emissions from golf course maintenance: https://doi.org/10.1002/its2.61- my blog post on conventional mowers, electric mowers, and electricity generation: https://www.asianturfgrass.com/post/mowing-electricity-energy/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/

Dr. Chas Schmid has been involved with many of the same topics I often study and consider---sand topdressing, potassium fertilization, soil organic matter, putting green performance, and so on. His data, and plenty of photographic evidence, also show that there can be completely different outcomes than what I might have expected. We discuss this, on a range of topics, in this episode.- Follow Chas on X: https://twitter.com/Chas_Schmid- We discussed as a starting point, this blog post: https://www.asianturfgrass.com/post/updated-sand-topdressing-by-gp/- This survey article about topdressing and OM: Organic Matter Concentration of Creeping Bentgrass Putting Greens in the Continental U.S. and Resident Management Impact: https://turf.unl.edu/Presentations/2018/the_canadian_2018_1.pdf- Potassium and Poa annua: https://doi.org/10.2134/agronj2018.03.0147- OSU 2023 summer field day book with updates on some of the projects we discussed: https://horticulture.oregonstate.edu/sites/agscid7/files/2023_osu_turf_summer_field_day_aug_31_2023_final.pdfRead more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get ATC newsletters at https://subscribepage.com/atc_newslettersTurfgrass information and decision-making tools at https://www.paceturf.org/PACE Turf YouTube channel at https://www.youtube.com/user/paceturfATC's YouTube channel at https://www.youtube.com/asianturfgrasscenterListen to the ATC Doublecut with Micah Woods podcast at https://doublecut.asianturfgrass.com/Listen to the ATC Office Hours podcast at https://office-hours.asianturfgrass.com/