Phosphorus, rootzone volume, and algae

The Brede equation takes the harmonic mean of the uphill and downhill directions to give the precise stimpmeter measurement with no overestimation.The update discussed is https://paceturf.org/updates/newton-and-green-speed/Read Dr. Brede's article "Measuring Green Speed on Sloped Putting Greens" from the Green Section Record at https://gsrpdf.lib.msu.edu/?file=/1990s/1990/901110.pdfRead Chris Hartwiger's article "Location, Location, Location: Choosing Good Spots To Measure Green Speed" from the Green Section Record at  https://www.usga.org/content/usga/home-page/course-care/green-section-record/64/issue-13/location--location--location--choosing-good-spots-to-measure-gre.htmlFind a suite of decision-making tools at https://www.paceturf.org/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get free newsletters at https://www.asianturfgrass.com/newsletter/

I answer a question from a listener and describe resources I use when assessing likely effects from an El Niño weather pattern,The update discussed is https://paceturf.org/updates/new-enso-blog/See the ENSO blog at https://www.climate.us/news-features/blogs/ensoSee global precipitation and temperature anomalies at https://www.cpc.ncep.noaa.gov/products/precip/CWlink/ENSO/regressions/geplr.shtmlSee USA precipitation and temperature anomalies at https://www.cpc.ncep.noaa.gov/products/precip/CWlink/ENSO/composites/EC_ENP_index.shtmlFind a suite of decision-making tools at https://www.paceturf.org/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get free newsletters at https://www.asianturfgrass.com/newsletter/

I go back five years to another video showing ball reaction on greens topdressed once that year. The post discussed with embedded video, is https://www.asianturfgrass.com/post/what-happens-if-you-dont-sand-greens/2026 video at https://youtu.be/3UL6euRZJko2021 video is at https://youtu.be/bbcJhA1zqNoFirm greens, three general principles: https://paceturf.org/updates/firm-green-fundamentals/Find a suite of decision-making tools at https://www.paceturf.org/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get free newsletters at https://www.asianturfgrass.com/newsletter/

Calcium is an essential element that is almost never required as fertilizer for turfgrass. This episodes explains how mass flow of Ca in the soil water creates an accumulation of Ca at the root surface.The post discussed is https://www.asianturfgrass.com/post/calcium-accumulation-root-surface/Find a suite of decision-making tools at https://paceturf.org/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get free newsletters at https://www.asianturfgrass.com/newsletter/

The KBC News TV station did a profile of Keya GC greenkeeper Andrew McDaniel. Watch that (with an English language soundtrack, if necessary) and hear about the driest summer in at least 40 years (I didn't look back farther than that).The post discussed is https://paceturf.org/updates/day-in-the-life/Direct link to the KBC News profile at https://youtu.be/8RjcS21MvosFind a suite of decision-making tools at https://paceturf.org/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get free newsletters at https://www.asianturfgrass.com/newsletter/

I discussed grass responding to P at establishment, but not at maturity, as a function of soil P combined with rootzone volume. Posts discussed are:https://www.asianturfgrass.com/post/rootzone-volume-and-p/https://www.asianturfgrass.com/post/algae-sand-fertilizer/Find a suite of decision-making tools at https://www.paceturf.org/Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/Get free newsletters at https://www.asianturfgrass.com/newsletter/

The topic of nutrient availability and extractable vs. exchangeable vs. available nutrients used to come up a lot, and I'm glad I haven't been asked this question as frequently in recent years. Fortunately, I have a long list of blog posts about this topic, and a good starting point is the one reviewed in this episode : https://www.asianturfgrass.com/post/its-not-really-about-extractable-or-available/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/

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/

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/

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/