The Doublecut with Micah Woods

Turfgrass soil test interpretation and the fertilizer recommendations that come from that have been highlighted as "arbitrary" and "based on other crops" and "needing more research." I suggest the #MLSN method as a way to bypass a lot of these problems, and Dr. Beth Guertal joined me to talk about this fascinating topic.

We discussed the post "Best judgment of the agronomist" which has a link to the #MLSN cheat sheet, plenty of quotes from the past 50 years about this problem, and links to plenty of information about making sure you apply just the right amount of fertilizer: https://www.asianturfgrass.com/post/best-judgment-of-the-agronomist/ 

• A discussion about potassium with Doug Soldat is at https://youtu.be/ilPhk30NQlQ
• Follow Dr. Guertal on Twitter at https://twitter.com/AUTurfFert
• Watch this episode at https://youtu.be/_xvII52YsZQ
• 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/

Bjarni Hannesson has been using the temperature-based turfgrass growth potential (GP) for ten years. We discussed how he makes use of it in Iceland, and how the GP can be used to predict when and how much N fertilizer may be required to produce the desired growth rate.

We discussed this blog post, to begin with: https://www.asianturfgrass.com/post/which-more-effect-growth-light-or-temperature/
We also discussed the link to download slides and a handout from my 2013 presentation about GP and its link to N rate through probable growth: https://www.asianturfgrass.com/post/method-for-estimating-turfgrass-nutrient-requirements-iceland-report/
For photos of turfgrass and golf courses in Iceland, I've put a photo gallery here: https://www.asianturfgrass.com/post/turfgrass-in-iceland/
Watch this episode at: https://youtu.be/jSPJ0mGLZ7k

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/

The temperature-based turfgrass growth potential (GP) is a utility function that expresses the potential of temperature to affect shoot growth. Without going into too many numbers or the GP equation, I explained what GP is and how it is used.

I discussed these posts and shows about GP:

- https://www.asianturfgrass.com/post/gp-explained-photos/
- https://www.asianturfgrass.com/post/gp-as-proxy-for-season-length/
- The ATC Office Hours episode with Larry Stowell about GP: https://www.youtube.com/live/oZgXv3ZaHkQ?feature=share
- PACE Turf climate appraisal forms with the GP equation embedded: https://www.paceturf.org/journal/climate

• Watch this episode at https://youtu.be/RK8hzJcep40
• 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/

Doug Soldat is a professor in the soil science department at the University of Wisconsin-Madison. We discussed a recent photo he shared showing dramatically increased snow mold where K fertilizer was applied. Or perhaps it was dramatically reduced snow mold where K fertilizer was not applied.

- See the photo we discussed: https://www.asianturfgrass.com/post/k-fertilizer-and-more-snow-mold/
- Watch this episode at https://youtu.be/ilPhk30NQlQ
- Bier et al. article on K supply from topdressing sand: A long term evaluation of differential potassium fertilization of a creeping bentgrass putting green, https://doi.org/10.1007/s11104-018-3765-8
- If you are in the USA and would like to send your topdressing sand for an analysis of K content, you can send to Dr. Soldat at this address:

Dept of Soil Science
Attn: Doug Soldat
1525 Observatory Dr.
Madison, WI  53706-1299

Regarding samples, these have to come from the USA. Soils require an import permit to enter the USA and he doesn't have a permit for samples for this project. US samples only, please.

- Dest and Guillard on non-exchangeable K, Bentgrass response to K fertilization and K release rates from eight sand rootzone sources used in putting green construction, available at https://opencommons.uconn.edu/plsc_articles/13/
- The pH chart article we discussed is by Hartemink and Barrow, Soil pH - nutrient relationships: the diagram, https://doi.org/10.1007/s11104-022-05861-z

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/

Detailed answers are at https://www.asianturfgrass.com/post/soil-sampling-and-interpetation-questions-om246-mlsn/

I also recommended these blogs/newsletters:

Chris Tritabaugh's ct_turf newsletter: https://ctunderscoreturf.substack.com/
Jason Haines' Fusariummy blog: https://fusariummy.blogspot.com/
See the ATC newsletters at https://subscribepage.com/atc_newsletters

• 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
• 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/

Paul B. Hurst joined me to discuss the Turfgrass Twitter 2022 analysis. Read more about that at https://www.asianturfgrass.com/post/turf-twitter-analysis-2022/

See the Turf Twitter 2022 app to find any and all accounts: https://asianturfgrass.shinyapps.io/turf_twitter_2022/

Follow Paul on Twitter: https://twitter.com/GreensPro

See the Rock Star video: https://twitter.com/GreensPro/status/1604139659730325506

Watch this episode on YouTube: https://youtu.be/qOo9JookSLE

• 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/

Joe Gulotti joined me to discuss ten blog posts from the ATC blog that got the fewest views in 2022. It's easy to understand why some of these are on the list. A few deserve another chance to be seen. We discuss a range of topics, from maintenance Mondays to 19th holes.

Here's the list we were talking about. These are the ten posts no one read last year (in relative terms): https://www.asianturfgrass.com/post/ten-posts-no-one-read-last-year-2022/

Listen to Joe's "The Talking Greenkeeper" podcast at https://podcasts.apple.com/us/podcast/the-talking-greenkeeper/id1435947281

Watch this episode at https://youtu.be/bGzc31TwR24

• 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/

I discussed the philosophy behind this post: https://www.asianturfgrass.com/post/is-two-tenths-of-a-pound-of-nitrogen-a-lot-or-a-little/
On a related topic, see this one about organic matter that was never there: https://www.asianturfgrass.com/post/what-if-it-was-never-there/
Watch this episode at https://youtu.be/8Eh_RkE1HGQ

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/

I showed photos from this post: https://www.asianturfgrass.com/post/flights-favorite-turf-photos-2022/
Watch this episode at https://youtu.be/eZIzaF7g6w8

• 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/

These posts were discussed in this episode:

• https://www.asianturfgrass.com/post/measuring-backwards-and-planning-forwards/
• https://www.asianturfgrass.com/post/key-moments-automatically-added-on-videos/
• https://www.asianturfgrass.com/post/pace-turf-updates-in-2022/
• https://www.asianturfgrass.com/post/some-surprising-results/
• https://www.asianturfgrass.com/post/a-long-talk-with-joe-gulotti/
• https://www.asianturfgrass.com/post/top-ten-posts-of-2022/

• 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/