Join me, along with Chris Tritabaugh from Hazeltine National GC, as we review autumn soil test results. We especially look at the #OM246 total organic material results, and discuss those in the context of maintenance work done, changes in the test results from past years, and most importantly, the relation of the tests to putting green performance.

• This video shows how to measure sand amounts: https://youtu.be/6LurONpyg5M?si=Von0kewt3gzi4wme
• This OM246 calculator finds the OM accumulation rate: https://asianturfgrass.shinyapps.io/om246/
• Find the climate appraisal form and more about GP at https://www.paceturf.org/
• Sign up for ATC newsletters at https://www.asianturfgrass.com/newsletter/
• About textbook N rates https://www.asianturfgrass.com/post/i-was-surprised-to-read-this-about-nitrogen-coring-and-sand/
• Summer cultivation and summer bentgrass decline https://www.asianturfgrass.com/post/hollow-tine-solid-tine-both-fail-alleviate-summer-bentgrass-decline/

Jason and Bjarni joined me to talk about some useful turfgrass math, especially  the turfgrass growth ratio, which you can read more about at https://www.asianturfgrass.com/tag/growth-ratio/

• Find more infomation at PACE Turf: https://www.paceturf.org/ 
• And at the ATC website: https://www.asianturfgrass.com/

For the third consecutive autumn, Chris Tritabaugh joined me to review the OM246 (total organic material by depth) test results from the greens at Hazeltine National Golf Club. We discussed playing conditions, maintenance work, and testing.

Here are some links.

• Chris's Substack: https://ctunderscoreturf.substack.com?utm_source=navbar&utm_medium=web&r=dakt8
• ATC website: https://www.asianturfgrass.com/
• ATC's OM246 page (with link to sampling recommendations): https://www.asianturfgrass.com/project/om246/
• PACE Turf: https://www.paceturf.org/
• Tim VanLoo's article on "Organic matter accumulation in sand-based [sports field] rootzones:" https://sportsfieldmanagementonline.com/2010/08/02/organic-matter-accumulation-in-sand-based-rootzones/4463/
• Tim VanLoo's thesis about OM and OM testing on sand-based sports fields: https://d.lib.msu.edu/etd/39253/OBJ/view
• My report about composite soil sampling for turfgrass: https://www.asianturfgrass.com/publication/woods-2020-sampling/

Richard Forsyth is the director of courses at Royal Melbourne Golf Club. We discussed playing conditions, maintenance work, and grass types in relation to production of firm putting surfaces.

Chris Tritabaugh and Doug Soldat also spoke about putting green firmness in this podcast: https://open.substack.com/pub/ctunderscoreturf/p/doug-soldat

A note about soil surfactants: https://www.asianturfgrass.com/post/what-do-wetting-agents-really-do/

Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
See ATC's YouTube channel at https://www.youtube.com/asianturfgrasscenter
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/

Eric Johnson joined from his office at Chambers Bay to discuss everyday golfing conditions, championship playing surfaces, and workflow using techniques such as clipping volume (#ClipVol), total organic material testing by depth (#OM246), and nutrient supply using #MLSN.

You can find Eric on Twitter at https://twitter.com/altshot2

Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/

Dr. Roch Gaussoin and I discussed soil organic matter, soil organic material, and a lot of things related that that topic.

Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find turfgrass information and decision-making tools at https://www.paceturf.org/
See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
See the ATC newsletters at https://subscribepage.com/atc_newsletters
Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/

Find out more about #OM246 testing at https://www.asianturfgrass.com/tag/om246/
Read Chris's blog with more about this topic at https://ct-turf.medium.com/

• Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
• Find turfgrass information and decision-making tools at https://www.paceturf.org/
• See the PACE Turf YouTube channel at https://www.youtube.com/user/paceturf
• See the ATC newsletters at https://subscribepage.com/atc_newsletters
• Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/
• Listen to the ATC Office Hours podcast at https://atc-office-hours.transistor.fm/

Jackie's thesis at Michigan State University was titled "Effects of Different Soil Testing Philosophies on Creeping Bentgrass and Annual Bluegrass Putting Greens." She looked at how much P and K were applied by different interpretation philosophies, how the grass stood up to traffic, and what happened to the elements that were applied. 

• All about #MLSN: https://www.asianturfgrass.com/mlsn/ 

Three blog posts with links to Jackie Guevara's research: 

• https://www.asianturfgrass.com/post/soil-test-showdown/  
• https://www.asianturfgrass.com/post/mlsn-and-turfgrass-nutrient-recommendations/ 
• https://www.asianturfgrass.com/post/adding-potassium-does-not-increase-soil-ability-to-store-it/ 

• Follow Jackie on Twitter at https://twitter.com/jackofallturf 
• Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/ 
• See the ATC newsletters at https://subscribepage.com/atc_newsletters 
• Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/ 

• Ball bounce clip from Dan Dinelli: https://youtube.com/clip/UgkxbIlZVkgZyANVSbtpaKnYkPk4xEeDGCyi
• Playability-tagged posts on the ATC website: https://www.asianturfgrass.com/tag/playability/
• Chris Tritabaugh's blog: https://ct-turf.medium.com/the-data-says-cc7defa451f0
• Office Hours with Andrew McDaniel sharing no change in OM despite only 1 sand topdressing event in a year: https://youtu.be/QxNAOcxzsYM
• 8 minute video showing tournament conditions with only one sand topdressing in a year, plus an absurd amount of rain leading into the tournament: https://youtu.be/bbcJhA1zqNo
• Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
• See the ATC newsletters at https://subscribepage.com/atc_newsletters
• Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/

• We discussed the ball reaction video from the 2021 KBC Augusta tournament: https://youtu.be/bbcJhA1zqNo
• Watch this episode on YouTube: https://youtu.be/QxNAOcxzsYM
• Follow Andrew McDaniel on Twitter: https://twitter.com/drumcturf
• OM246 project page: https://www.asianturfgrass.com/project/om246/
• Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
• See the ATC newsletters at https://subscribepage.com/atc_newsletters
• Listen to the ATC Doublecut with Micah Woods podcast at https://atc-doublecut.transistor.fm/