These are the top 5 posts on this site, ranked by total pageviews.

  1. Is carbon the next frontier in fertilization?

  2. This one simple trick can transform putting greens from usually good to consistently great

  3. New MLSN cheat sheet

  4. Soil organic matter: a bullet list

  5. This will make you rethink what you throw in the spray tank

ATC南店

Worldwide agroclimatology data, PAR, shade, and grass 28 Nov 2020

aeration

5 examples of Goodhart's law in turfgrass management 04 Dec 2020

aerify

What do Ninja tines, PoaCure, ClipVol, the Smith-Kerns disease model, ball roll, and MLSN have in common? 20 Aug 2020
Hollow-tine cultivation and solid-tine spiking both failed to alleviate summer bentgrass decline 24 Jul 2020
Core aerating putting greens, or not 29 Sep 2019
Cleaning cores the easy way 16 Sep 2019
Half-aerified greens; sodded fairway stripes; with other interesting and informative matters 19 Mar 2019
A pleasant day, with an unpleasant termination 10 Jul 2018
Learn the rules like a pro, so you can break them like an artist 05 Apr 2018

algae

Algae, sand, and phosphorus 10 May 2020

article

New technologies, ethics, and money 28 Feb 2020
Asking the right questions 26 Feb 2020
Quacks and Suckers 24 Feb 2020
I forgot this one too 13 Nov 2019
New article in GCM about MLSN 12 Oct 2019
New article with a straightforward discussion of clipping volume 03 Jul 2019
The SportsTurf Interview: Dr. Micah Woods 06 Jun 2019
The ATC Turfgrass Library 09 Apr 2019
"You have been featured - Golf Digest India May 2018" 04 May 2018
The September cover article in Bizgolf about turf, me, and ATC 23 Oct 2017

australia

Insight from Andrew Thomson's Presidents Cup Diary 11 Dec 2019
"After a pimento cheese sandwich and a Masters club ..." 28 Feb 2018
Flights and favorite turf photos of 2017 29 Dec 2017

awesome

A non-comprehensive list of awesome turfgrass things other people did this year 28 Dec 2020
A non-comprehensive list of awesome turfgrass things other people did this year 31 Dec 2019
A non-comprehensive list of awesome turfgrass things other people did this year 30 Dec 2018
A non-comprehensive list of awesome turfgrass things other people did this year 24 Dec 2017

bentgrass

A "new" column, starting with creeping bentgrass heat stress 31 Aug 2020
Hollow-tine cultivation and solid-tine spiking both failed to alleviate summer bentgrass decline 24 Jul 2020
Radish seedlings on a bentgrass nursery after fumigation 29 Jun 2020
Can you see the P? 21 Dec 2019
Competition, stress, and disturbance 31 Oct 2019
Flights and favorite turf photos of 2018 20 Jan 2019
Catching up on my reading, heat stress edition 23 Sep 2018
A greenkeeping discussion 29 Aug 2017
Phosphorus deficiency symptoms in the control plots 31 Jul 2017
Can we guess how low the P is here 26 Jul 2017

bermuda

Bermudagrass stolons and zoysiagrass rhizomes 09 Sep 2020
Bermudagrass, zoysiagrass, and water use 23 May 2020
Turf performance and the lifespan of individual grass leaves 25 Mar 2020
Big differences between species 31 Jan 2020
Presentation videos from the 2017 ASHS conference 21 Oct 2017
The growth, nutrient use, and water use of 3 grasses in central Thailand 25 Sep 2017

bermudagrass

Numerical notes from Nikanti GC 01 Aug 2020
Experiment update: fertilizer response at planting 17 Nov 2019
Fertilizer response at planting 29 Oct 2019
Can you spot the grass that did not get enough water? 21 Jan 2019
Four reasons zoysia should be a poor choice for California 15 Oct 2018
Drought, bermudagrass, and zoysiagrass 15 Oct 2018
Flights and favorite turf photos of 2017 29 Dec 2017
Year to date rain, and bermudagrass quality 16 Nov 2017

bigga

BTME 2019 on Twitter 27 Jan 2019
My four presentations at BTME 24 Jan 2018
I just bought a plane ticket to Manchester 16 Aug 2017

btme

BTME 2019 on Twitter 27 Jan 2019
My four presentations at BTME 24 Jan 2018
I just bought a plane ticket to Manchester 16 Aug 2017

calcium

5 examples of Goodhart's law in turfgrass management 04 Dec 2020
Before your next calcium app, read this 23 Feb 2020
Calcium leaches? 14 Feb 2020

carbon

Asking the right questions 26 Feb 2020
"Relative to their own requirements, animals and microbes live in a carbon-rich, nitrogen-poor world" 01 Jun 2018

carpetgrass

Flights and favorite turf photos of 2019 02 Jan 2020
Can you see the P? 21 Dec 2019
Flights and favorite turf photos of 2017 29 Dec 2017

climate

Is it temperature or day length? 17 Mar 2019
Tokyo temperatures and growth potential, animated 10 Mar 2019
Four amazing charts: number 3 will shock you! 26 Dec 2018
Four reasons zoysia should be a poor choice for California 15 Oct 2018
High resolution DLI maps of the United States 14 Oct 2018
Managing turfgrass diseases in Asia with minimal input 30 Jul 2018
Temperature and zoysia 23 Jul 2018
Three recent conversations 16 Apr 2018
When does it usually rain in Bangkok? 09 Feb 2018

clipping

Leaves of grass 11 Mar 2018

clipping volume

"Hell, I did that 30 years ago" 29 Sep 2018
My presentations in Coeur d'Alene 19 Oct 2017
Historical clipping data 13 Oct 2017
Flipping things around 15 Sep 2017
Morning clipping volume during tournament week at KBC Augusta 14 Aug 2017

clipvol

Flying Blind: the episode you've been waiting for 16 Dec 2020
Thai GCSA seminar: improving playing conditions and optimizing work efficiency 14 Dec 2020
The Flying Blind trailer: 8 things to know, measure, and adjust 12 Dec 2020
7 things I've learned about turfgrass around the world 08 Dec 2020
Key things to know about high quality turf surfaces 16 Nov 2020
Two suggestions about clipping volume data recording 24 Oct 2020
Three #rturf projects: green speed & clipvol, zoysia response to fertilizer during grow-in, and report automation 26 Aug 2020
What do Ninja tines, PoaCure, ClipVol, the Smith-Kerns disease model, ball roll, and MLSN have in common? 20 Aug 2020
Twice the growth at a different mowing height 24 Jun 2020
Putting green organic matter by depth in the soil 13 May 2020
Webinar recording: critical maintenance this year 08 May 2020
It is easy to know when grass grows too slow 07 May 2020
Sand topdressing by growth rate and clipping volume 01 May 2020
Before your next calcium app, read this 23 Feb 2020
Calcium leaches? 14 Feb 2020
Highlights from three seminars in Copenhagen 06 Dec 2019
Grammatik for greenkeepere, plus buckets and stimp stats 12 Nov 2019
Putting green speed, surface hardness, and clipping volume 22 Sep 2019
The Cornell Turf Talk Podcast with Special Guest David Hicks 10 Jul 2019
Post-rain growth flush from nitrogen in the rain or nitrogen from the soil 09 Jul 2019
New article with a straightforward discussion of clipping volume 03 Jul 2019
"Positive comments from the players which is really what counts" 01 May 2019
Creeping bentgrass nutrient use in summer 18 Apr 2019
Genki level pamphlet 07 Apr 2019
The turfgrass genki level, part 3: turf growth response measured by clippings 10 Feb 2019
One bucket at a time 27 Dec 2018
Guest on the Talking Greenkeeper show 06 Nov 2018
"Nothing to do with whether or not it works" 21 Oct 2018
Predicting organic matter in turfgrass soils 29 Jun 2018
Some rise, some fall, some climb 10 Jun 2018
Two more things about clipping volume: timelines & ball roll 03 Jun 2018
Recording of my #ClipVol webinar at TurfNet 24 Apr 2018
Three recent conversations 16 Apr 2018
The case for reactive greenkeeping 01 Apr 2018
Clipping volume, green speed, and units 25 Mar 2018
Clipping volume, or clipping weight? 04 Jul 2017

coring

5 examples of Goodhart's law in turfgrass management 04 Dec 2020
Hollow-tine cultivation and solid-tine spiking both failed to alleviate summer bentgrass decline 24 Jul 2020
Core aerating putting greens, or not 29 Sep 2019
Cleaning cores the easy way 16 Sep 2019

czech

Flights and favorite turf photos of 2018 20 Jan 2019
3 presentations at the Czech Greenkeepers Association conference 14 Dec 2018

data

5 examples of Goodhart's law in turfgrass management 04 Dec 2020
Numerical notes from Nikanti GC 01 Aug 2020
Quick screencast of my continuous improvement system presentation 25 Nov 2019

data analysis

Three #rturf projects: green speed & clipvol, zoysia response to fertilizer during grow-in, and report automation 26 Aug 2020
Ranking Turf Twitter in 2019 20 Jan 2020
Of conventional mowers, electric mowers, and electricity generation 02 May 2019
Northern Virginia sunlight in 2018 compared to previous years 02 Feb 2019
Ranking Turf Twitter in 2018 31 Jan 2019
Top 25 turfgrass tweets of the 2018 Ryder Cup 18 Oct 2018
Rituals, surrogate markers, and turf performance outcomes 16 Sep 2018
Shopping for magazines in 7-11 at 4 a.m. 14 Sep 2018
Geographical analysis of those using MLSN 15 Aug 2017
Morning clipping volume during tournament week at KBC Augusta 14 Aug 2017
Turfgrass industry social network use for work 11 Aug 2017
A chart of asianturfgrass's most influential Twitter followers 30 Jul 2017
"More followers as a superintendent?" 12 Jul 2017

denmark

Highlights from three seminars in Copenhagen 06 Dec 2019
Grammatik for greenkeepere, plus buckets and stimp stats 12 Nov 2019

disease

The cause of these spots may surprise you 12 Aug 2020
MLSN and disease 21 Apr 2020
Rolling, nitrogen, dollar spot, and Microdochium patch 23 Mar 2020
Recording of my presentation about managing turfgrass diseases in Asia 15 Sep 2018
Managing turfgrass diseases in Asia with minimal input 30 Jul 2018
Smith-Kerns and korai 17 Jun 2018
The probability of a dollar spot epidemic 30 May 2018
So much silicon research I can't keep up with it all 20 May 2018
"Potassium applications have been associated with increased winter diseases in northern climates" 27 Sep 2017

drought

Bermudagrass, zoysiagrass, and water use 23 May 2020

ecology

Turf performance and the lifespan of individual grass leaves 25 Mar 2020

education

Online education through GreenKeeper University 08 Nov 2019

england

Two solutions for the problems of turfgrass fertilizer recommendations 07 Jul 2018
My four presentations at BTME 24 Jan 2018
I just bought a plane ticket to Manchester 16 Aug 2017

environment

Of conventional mowers, electric mowers, and electricity generation 02 May 2019
Autonomous mower at 12 mm produced higher quality turf, increased shoot density, and reduced energy use compared to a conventional reel mower 08 Dec 2018
"Never has a sport needed to adapt more" 15 Jan 2018
3 reasons sheep are better than cows for mowing fairways 24 Nov 2013

equipment

Cleaning cores the easy way 16 Sep 2019
Grass on the Kumamoto City Tram lines 07 Sep 2019
Smoother fairways with a 10 ton vibratory roller 17 Aug 2019
Pitch performance workshop in Bangkok 16 Aug 2019

fertilizer

Fun on my front steps 14 Oct 2020
This is why you replicate 14 Sep 2020
Three #rturf projects: green speed & clipvol, zoysia response to fertilizer during grow-in, and report automation 26 Aug 2020
A quick geographical estimate of MLSN reach 21 Jul 2020
Twice the growth at a different mowing height 24 Jun 2020
How MLSN works 27 May 2020
MLSN and salinity 26 May 2020
Four more sources for MLSN information 22 May 2020
Brand new MLSN webinar this Friday 18 May 2020
A new article about MLSN fertilization on golf courses 17 May 2020
Algae, sand, and phosphorus 10 May 2020
When grass grows more, it makes more roots 17 Apr 2020
Roots on grass supplied with N, P, and K 06 Apr 2020
Roots on grass kept deficient in P and K 03 Apr 2020
Four ways to determine nutrient requirements 26 Mar 2020
Rolling, nitrogen, dollar spot, and Microdochium patch 23 Mar 2020
None of the expensive fertilizer programs were superior to that of urea and iron 19 Mar 2020
Simple, idiot proof, and inexpensive 17 Mar 2020
Quacks and Suckers 24 Feb 2020
Before your next calcium app, read this 23 Feb 2020
Dandelions and potassium 25 Dec 2019
Can you see the P? 21 Dec 2019
The top 10 posts from the old blog 11 Dec 2019
Three hours of an MLSN seminar on just one slide 30 Nov 2019
Experiment update: fertilizer response at planting 17 Nov 2019
Fertilizer response at planting 29 Oct 2019
Time for a new excuse 29 Sep 2019
Creeping bentgrass nutrient use in summer 18 Apr 2019
Pretty hopeless in predicting deficiency 05 Mar 2019
The turfgrass genki level, part 5: what's real, what's not, & the simplicity of this 18 Feb 2019
The turfgrass genki level, part 4: a normalized comparison of N fertilizer to growth rate 15 Feb 2019
The turfgrass genki level, part 3: turf growth response measured by clippings 10 Feb 2019
The turfgrass genki level, part 2: showing N applied in relation to standard N 03 Feb 2019
The turfgrass genki level, part 1: from temperature to standard N 03 Feb 2019
Humbug, the MLSN movie 29 Nov 2018
MLSN for leaf tissue 30 Sep 2018
Airplane fuel requirements, soil test calcium, and MLSN 07 Sep 2018
Two solutions for the problems of turfgrass fertilizer recommendations 07 Jul 2018
What causes disasters, expensive corrective measures, and deterioration of good golfing conditions? 24 Jun 2018
Some rise, some fall, some climb 10 Jun 2018
"Relative to their own requirements, animals and microbes live in a carbon-rich, nitrogen-poor world" 01 Jun 2018
Is carbon "the next frontier in fertilization?" 31 May 2018
So much silicon research I can't keep up with it all 20 May 2018
Tissue testing and gas mileage 30 Apr 2018
Learn the rules like a pro, so you can break them like an artist 05 Apr 2018
The case for reactive greenkeeping 01 Apr 2018
I've got a new slide 11 Feb 2018
How to get a quick estimate of grass nutrient use 06 Feb 2018
If the greens are too hard, how to make them soft? 05 Feb 2018
New MLSN cheat sheet 03 Feb 2018
More than a success story 20 Jan 2018
I've been asked to give a seminar on MLSN guidelines 13 Jan 2018
Fixing these issues in one fell swoop 23 Dec 2017
"I am curious about your stance on nutrients in irrigation water ..." 04 Dec 2017
Minimalist turfgrass nutrition 27 Nov 2017
"Aside from allowing me to cut my nitrogen rates in half without compromising turf quality, I have seen reductions in turf diseases, thatch, required mowing, fuel use and labor" 26 Nov 2017
As to the MLSN guidelines ... how do they apply to growing in a new course? 29 Oct 2017
Presentation videos from the 2017 ASHS conference 21 Oct 2017
This is the time of year for ... 10 Oct 2017
Flipping things around 15 Sep 2017
MLSN in use: soil tests, fertilizer, and the results 24 Aug 2017
How to spend less than $5,000 on tournament green fertilizer 23 Aug 2017
Tissue testing for turfgrass 09 Aug 2017
Tissue testing: sometimes my own words come back to haunt me 08 Aug 2017
Tissue testing: aiming at the wrong target 07 Aug 2017
Have you seen turf that ran out of potassium? 06 Aug 2017
Phosphorus deficiency symptoms in the control plots 31 Jul 2017
Can we guess how low the P is here 26 Jul 2017
Green speed ridgeline plot and the work to produce these conditions 17 Jul 2017
Sward stimpmeter speed for seven species 16 Jul 2017
"My frustration in not being able to increase our green speed" 14 Jul 2017
This will make you rethink what you throw in the spray tank 06 Jul 2017
An economic case study 05 Jul 2017
"Sorry if this is a rubbish question" 28 Jun 2017

firmness

Numerical notes from Nikanti GC 01 Aug 2020
Surface hardness of eight grass species on putting greens 19 Apr 2020
Four tools to measure surface hardness 18 Apr 2020

football

Pitch performance workshop in Bangkok 16 Aug 2019
Making natural grass work for grassroots football 28 Oct 2018
Grass and soil for sports turf in Thailand 24 Jul 2018

frost

Half-aerified greens; sodded fairway stripes; with other interesting and informative matters 19 Mar 2019

gdd

"After a pimento cheese sandwich and a Masters club ..." 28 Feb 2018
"The difference between a model working great and being a massive failure" 04 Oct 2017

genki level

Genki level pamphlet 07 Apr 2019
The turfgrass genki level, part 5: what's real, what's not, & the simplicity of this 18 Feb 2019
The turfgrass genki level, part 4: a normalized comparison of N fertilizer to growth rate 15 Feb 2019
The turfgrass genki level, part 3: turf growth response measured by clippings 10 Feb 2019
The turfgrass genki level, part 2: showing N applied in relation to standard N 03 Feb 2019
The turfgrass genki level, part 1: from temperature to standard N 03 Feb 2019

golf

A golfers' paradise 28 Jan 2019
Golf and Health 11 Oct 2018
Shopping for magazines in 7-11 at 4 a.m. 14 Sep 2018
"Never has a sport needed to adapt more" 15 Jan 2018
Turfgrass at a Tourism Convention 21 Jul 2017

gp

Remember this? Saving $150,000 in a year? I checked the results 8 months later 27 Jul 2017

greece

Flights and favorite turf photos of 2018 20 Jan 2019

green speed

Three #rturf projects: green speed & clipvol, zoysia response to fertilizer during grow-in, and report automation 26 Aug 2020
Highlights from three seminars in Copenhagen 06 Dec 2019
Grammatik for greenkeepere, plus buckets and stimp stats 12 Nov 2019
Putting green speed, surface hardness, and clipping volume 22 Sep 2019
Organic matter and green speed at the 40th Spanish Greenkeepers Congress 01 Dec 2018
Shopping for magazines in 7-11 at 4 a.m. 14 Sep 2018
Two more things about clipping volume: timelines & ball roll 03 Jun 2018
Clipping volume, green speed, and units 25 Mar 2018
Green speed ridgeline plot and the work to produce these conditions 17 Jul 2017
Sward stimpmeter speed for seven species 16 Jul 2017
"My frustration in not being able to increase our green speed" 14 Jul 2017
This will make you rethink what you throw in the spray tank 06 Jul 2017

greenkeeping

Flying Blind: the episode you've been waiting for 16 Dec 2020
Thai GCSA seminar: improving playing conditions and optimizing work efficiency 14 Dec 2020
5 examples of Goodhart's law in turfgrass management 04 Dec 2020
Still Learning: the official trailer 29 Nov 2020
Putting green organic matter by depth in the soil 13 May 2020
Webinar recording: critical maintenance this year 08 May 2020
It is easy to know when grass grows too slow 07 May 2020
Sand topdressing by growth rate and clipping volume 01 May 2020
Temperature-based growth potential (GP) in April and November 30 Apr 2020
April 27 webinar on critical maintenance in 2020 21 Apr 2020
Surface hardness of eight grass species on putting greens 19 Apr 2020
Four tools to measure surface hardness 18 Apr 2020
No magic bullets in plant nutrition 15 Apr 2020
New technologies, ethics, and money 28 Feb 2020
Asking the right questions 26 Feb 2020
Quacks and Suckers 24 Feb 2020
Highlights from three seminars in Copenhagen 06 Dec 2019
An important Conference takes place between Mr. Gulotti and Andrew McDaniel 21 Feb 2019
Kurofune keeper 18 Nov 2018
Kurofune keeper 17 Nov 2018
Guest on the Talking Greenkeeper show 06 Nov 2018
"Nothing to do with whether or not it works" 21 Oct 2018
What we talked about 27 Sep 2018
Three distinct ways I've thought about turfgrass management 13 Sep 2017

growth

Post-rain growth flush from nitrogen in the rain or nitrogen from the soil 09 Jul 2019
Clipping volume, or clipping weight? 04 Jul 2017

growth potential

Updated spreadsheets for sand topdressing by GP 03 Aug 2020
Putting green organic matter by depth in the soil 13 May 2020
Sand topdressing by growth rate and clipping volume 01 May 2020
Temperature-based growth potential (GP) in April and November 30 Apr 2020
Genki level pamphlet 07 Apr 2019
The turfgrass genki level, part 5: what's real, what's not, & the simplicity of this 18 Feb 2019
The turfgrass genki level, part 4: a normalized comparison of N fertilizer to growth rate 15 Feb 2019
The turfgrass genki level, part 3: turf growth response measured by clippings 10 Feb 2019
The turfgrass genki level, part 2: showing N applied in relation to standard N 03 Feb 2019
The turfgrass genki level, part 1: from temperature to standard N 03 Feb 2019
Learn the rules like a pro, so you can break them like an artist 05 Apr 2018
"Aside from allowing me to cut my nitrogen rates in half without compromising turf quality, I have seen reductions in turf diseases, thatch, required mowing, fuel use and labor" 26 Nov 2017
The Palm Springs inflection date in 2017 13 Nov 2017
Warm-season grass, autumn temperatures, and winter overseeding 05 Nov 2017
Sand topdressing and growth potential 03 Sep 2017
GP is a number. It's explained here in photos and words. 01 Sep 2017
Sand topdressing to match grass growth 20 Aug 2017

hardness

Surface hardness of eight grass species on putting greens 19 Apr 2020
Four tools to measure surface hardness 18 Apr 2020

health

Golf and Health 11 Oct 2018

heat stress

A "new" column, starting with creeping bentgrass heat stress 31 Aug 2020

india

"You have been featured - Golf Digest India May 2018" 04 May 2018
3 reasons sheep are better than cows for mowing fairways 24 Nov 2013

irrigation

Sodding highway median strips with zoysia 14 Nov 2020
MLSN and salinity 26 May 2020
Bermudagrass, zoysiagrass, and water use 23 May 2020
Before your next calcium app, read this 23 Feb 2020
Calcium leaches? 14 Feb 2020
Big differences between species 31 Jan 2020
The top 10 posts from the old blog 11 Dec 2019
Can you spot the grass that did not get enough water? 21 Jan 2019
Drought, bermudagrass, and zoysiagrass 15 Oct 2018
It doesn't have to be so complicated 15 Jul 2018
Turf stories as Twitter Moments 22 May 2018
"I am curious about your stance on nutrients in irrigation water ..." 04 Dec 2017
A greenkeeping discussion 29 Aug 2017

japan

Radish seedlings on a bentgrass nursery after fumigation 29 Jun 2020
Winter grass color, zoysia, and soil 11 Feb 2020
Flights and favorite turf photos of 2019 02 Jan 2020
Putting green speed, surface hardness, and clipping volume 22 Sep 2019
Cleaning cores the easy way 16 Sep 2019
Grass on the Kumamoto City Tram lines 07 Sep 2019
Ball bounce on greens after 7 days of rain 27 Aug 2019
Half-aerified greens; sodded fairway stripes; with other interesting and informative matters 19 Mar 2019
Is it temperature or day length? 17 Mar 2019
Tokyo temperatures and growth potential, animated 10 Mar 2019
An important Conference takes place between Mr. Gulotti and Andrew McDaniel 21 Feb 2019
A golfers' paradise 28 Jan 2019
Flights and favorite turf photos of 2018 20 Jan 2019
Kurofune keeper 18 Nov 2018
Kurofune keeper 17 Nov 2018
Botanizing at Nippon Treasure Links 10 Oct 2018
Catching up on my reading, heat stress edition 23 Sep 2018
Shopping for magazines in 7-11 at 4 a.m. 14 Sep 2018
After 17 inches of rain, how much K leached? 03 Aug 2018
A pleasant day, with an unpleasant termination 10 Jul 2018
Smith-Kerns and korai 17 Jun 2018
Par Golf's Impact manga, media, and golf course maintenance 31 Mar 2018
Flights and favorite turf photos of 2017 29 Dec 2017
Topdressing frequency on golf course putting greens in Japan 20 Dec 2017
A greenkeeping discussion 29 Aug 2017
MLSN in use: soil tests, fertilizer, and the results 24 Aug 2017
How to spend less than $5,000 on tournament green fertilizer 23 Aug 2017
A lot more than your average tournament 18 Aug 2017
Clipping volume, or clipping weight? 04 Jul 2017

javagrass

Javagrass lawns in Bangkok 18 Mar 2018

korai

A pleasant day, with an unpleasant termination 10 Jul 2018
How to spend less than $5,000 on tournament green fertilizer 23 Aug 2017
A lot more than your average tournament 18 Aug 2017

lawns

Javagrass lawns in Bangkok 18 Mar 2018

leaching

After 17 inches of rain, how much K leached? 03 Aug 2018

leaf nutrient analysis

Pretty hopeless in predicting deficiency 05 Mar 2019
Tissue testing and gas mileage 30 Apr 2018
Tissue testing for turfgrass 09 Aug 2017
Tissue testing: sometimes my own words come back to haunt me 08 Aug 2017
Tissue testing: aiming at the wrong target 07 Aug 2017

light

The last year of DLI with weekly averages 30 Nov 2020
Worldwide agroclimatology data, PAR, shade, and grass 28 Nov 2020
Morning shade looks like this 06 Mar 2020
PAR looks like this 05 Mar 2020
Northern Virginia sunlight in 2018 compared to previous years 02 Feb 2019
Four reasons zoysia should be a poor choice for California 15 Oct 2018
High resolution DLI maps of the United States 14 Oct 2018
Turf stories as Twitter Moments 22 May 2018
Is morning sun the most important for turf? It depends. 28 Apr 2018
"I really wish that I could hear this presentation" 08 Mar 2018
GP is a number. It's explained here in photos and words. 01 Sep 2017

manilagrass

Worldwide agroclimatology data, PAR, shade, and grass 28 Nov 2020
Big differences between species 31 Jan 2020
Flights and favorite turf photos of 2019 02 Jan 2020
Flights and favorite turf photos of 2018 20 Jan 2019
Paspalum and manilagrass lawns 21 May 2018

micronutrients

Pretty hopeless in predicting deficiency 05 Mar 2019

mlsn

Soil test showdown 21 Dec 2020
Flying Blind: the episode you've been waiting for 16 Dec 2020
Thai GCSA seminar: improving playing conditions and optimizing work efficiency 14 Dec 2020
The Flying Blind trailer: 8 things to know, measure, and adjust 12 Dec 2020
7 things I've learned about turfgrass around the world 08 Dec 2020
This is why you replicate 14 Sep 2020
What do Ninja tines, PoaCure, ClipVol, the Smith-Kerns disease model, ball roll, and MLSN have in common? 20 Aug 2020
A quick geographical estimate of MLSN reach 21 Jul 2020
How MLSN works 27 May 2020
MLSN and salinity 26 May 2020
Four more sources for MLSN information 22 May 2020
Brand new MLSN webinar this Friday 18 May 2020
A new article about MLSN fertilization on golf courses 17 May 2020
MLSN and disease 21 Apr 2020
When grass grows more, it makes more roots 17 Apr 2020
No magic bullets in plant nutrition 15 Apr 2020
Four ways to determine nutrient requirements 26 Mar 2020
Updated K calculator 03 Mar 2020
Dandelions and potassium 25 Dec 2019
Can you see the P? 21 Dec 2019
Three hours of an MLSN seminar on just one slide 30 Nov 2019
Quick screencast of my continuous improvement system presentation 25 Nov 2019
MLSN seminar series in Sweden 17 Oct 2019
New article in GCM about MLSN 12 Oct 2019
Time for a new excuse 29 Sep 2019
Humbug, the MLSN movie 29 Nov 2018
The new MLSN movie trailer 17 Nov 2018
Guest on the Talking Greenkeeper show 06 Nov 2018
MLSN for leaf tissue 30 Sep 2018
Airplane fuel requirements, soil test calcium, and MLSN 07 Sep 2018
Two solutions for the problems of turfgrass fertilizer recommendations 07 Jul 2018
Three recent conversations 16 Apr 2018
How to get a quick estimate of grass nutrient use 06 Feb 2018
New MLSN cheat sheet 03 Feb 2018
More than a success story 20 Jan 2018
I've been asked to give a seminar on MLSN guidelines 13 Jan 2018
Fixing these issues in one fell swoop 23 Dec 2017
Minimalist turfgrass nutrition 27 Nov 2017
"Aside from allowing me to cut my nitrogen rates in half without compromising turf quality, I have seen reductions in turf diseases, thatch, required mowing, fuel use and labor" 26 Nov 2017
As to the MLSN guidelines ... how do they apply to growing in a new course? 29 Oct 2017
MLSN in use: soil tests, fertilizer, and the results 24 Aug 2017
Geographical analysis of those using MLSN 15 Aug 2017
Have you seen turf that ran out of potassium? 06 Aug 2017
Phosphorus deficiency symptoms in the control plots 31 Jul 2017
Remember this? Saving $150,000 in a year? I checked the results 8 months later 27 Jul 2017
Can we guess how low the P is here 26 Jul 2017
An economic case study 05 Jul 2017
"Sorry if this is a rubbish question" 28 Jun 2017

mowing

Twice the growth at a different mowing height 24 Jun 2020
Putting green speed, surface hardness, and clipping volume 22 Sep 2019
Of conventional mowers, electric mowers, and electricity generation 02 May 2019
Autonomous mower at 12 mm produced higher quality turf, increased shoot density, and reduced energy use compared to a conventional reel mower 08 Dec 2018
Some rise, some fall, some climb 10 Jun 2018
Green speed ridgeline plot and the work to produce these conditions 17 Jul 2017
Sward stimpmeter speed for seven species 16 Jul 2017
This will make you rethink what you throw in the spray tank 06 Jul 2017
3 reasons sheep are better than cows for mowing fairways 24 Nov 2013

nitrogen

Rolling, nitrogen, dollar spot, and Microdochium patch 23 Mar 2020
Post-rain growth flush from nitrogen in the rain or nitrogen from the soil 09 Jul 2019
Genki level pamphlet 07 Apr 2019
The turfgrass genki level, part 5: what's real, what's not, & the simplicity of this 18 Feb 2019
The turfgrass genki level, part 4: a normalized comparison of N fertilizer to growth rate 15 Feb 2019
The turfgrass genki level, part 3: turf growth response measured by clippings 10 Feb 2019
The turfgrass genki level, part 2: showing N applied in relation to standard N 03 Feb 2019
The turfgrass genki level, part 1: from temperature to standard N 03 Feb 2019
Nitrogen, rain, and starting point estimates 12 Sep 2018
"Relative to their own requirements, animals and microbes live in a carbon-rich, nitrogen-poor world" 01 Jun 2018
Flipping things around 15 Sep 2017
GP is a number. It's explained here in photos and words. 01 Sep 2017

om246

Flying Blind: the episode you've been waiting for 16 Dec 2020
Thai GCSA seminar: improving playing conditions and optimizing work efficiency 14 Dec 2020
The Flying Blind trailer: 8 things to know, measure, and adjust 12 Dec 2020
7 things I've learned about turfgrass around the world 08 Dec 2020
A Tale of Two Tests 02 Dec 2020
Organic matter separation from turfgrass soil samples 25 Nov 2020
Key things to know about high quality turf surfaces 16 Nov 2020
Total organic matter at the surface of warm-season grass putting greens 08 Oct 2020
Total organic matter at the surface of cool-season grass putting greens 06 Oct 2020
What do Ninja tines, PoaCure, ClipVol, the Smith-Kerns disease model, ball roll, and MLSN have in common? 20 Aug 2020
Numerical notes from Nikanti GC 01 Aug 2020
Variation in rootzone organic matter (humus) from point to point on the same green 08 Jul 2020
How much does total organic matter vary within the same green? 06 Jul 2020
Simple, idiot proof, and inexpensive 17 Mar 2020
Soil organic matter: a bullet list 17 Feb 2020
Catching up with my reading 17 Jan 2020
Quick screencast of my continuous improvement system presentation 25 Nov 2019
A continuous improvement system for turfgrass 08 Sep 2019
Three reasons why sand topdressing is best expressed as a depth 08 Aug 2019
Total organic matter testing on putting greens: sample number and sample volume 29 Jul 2019
This one simple trick can transform putting greens from usually good to consistently great 25 Jun 2019

organic matter

A Tale of Two Tests 02 Dec 2020
Organic matter separation from turfgrass soil samples 25 Nov 2020
Total organic matter at the surface of warm-season grass putting greens 08 Oct 2020
Total organic matter at the surface of cool-season grass putting greens 06 Oct 2020
Numerical notes from Nikanti GC 01 Aug 2020
Variation in rootzone organic matter (humus) from point to point on the same green 08 Jul 2020
How much does total organic matter vary within the same green? 06 Jul 2020
Putting green organic matter by depth in the soil 13 May 2020
Sand topdressing by growth rate and clipping volume 01 May 2020
Simple, idiot proof, and inexpensive 17 Mar 2020
Asking the right questions 26 Feb 2020
Soil organic matter: a bullet list 17 Feb 2020
Three reasons why sand topdressing is best expressed as a depth 08 Aug 2019
Total organic matter testing on putting greens: sample number and sample volume 29 Jul 2019
This one simple trick can transform putting greens from usually good to consistently great 25 Jun 2019
Verdure removal (or not) in turfgrass soil profile organic matter tests 19 Jun 2019
Temperature for loss on ignition in turfgrass soils 14 Jun 2019
Measuring organic matter 10 Jun 2019
Thinking about sand 09 Jun 2019
Do you need to add beneficial microbes to the soil to make it function properly? 18 Feb 2019
Organic matter and green speed at the 40th Spanish Greenkeepers Congress 01 Dec 2018
Nutranta seminar at Manila Southwoods 21 Nov 2018
Predicting organic matter in turfgrass soils 29 Jun 2018
If the greens are too hard, how to make them soft? 05 Feb 2018

overseed

Half-aerified greens; sodded fairway stripes; with other interesting and informative matters 19 Mar 2019

pH

Why soil pH should usually be kept above 5.5 14 Mar 2020
"Percent base saturation seems not to be a particularly useful concept" 16 Sep 2017

parks

Javagrass lawns in Bangkok 18 Mar 2018

paspalum

Pitch performance workshop in Bangkok 16 Aug 2019
Can you spot the grass that did not get enough water? 21 Jan 2019
Flights and favorite turf photos of 2018 20 Jan 2019
Paspalum and manilagrass lawns 21 May 2018
Presentation videos from the 2017 ASHS conference 21 Oct 2017
The growth, nutrient use, and water use of 3 grasses in central Thailand 25 Sep 2017
Remember this? Saving $150,000 in a year? I checked the results 8 months later 27 Jul 2017

ph

It is difficult to run a fertilizer down the field when the corn is six feet high 10 Apr 2020

philippines

Catching up with my reading 17 Jan 2020
Quick screencast of my continuous improvement system presentation 25 Nov 2019
A continuous improvement system for turfgrass 08 Sep 2019
Nutranta seminar at Manila Southwoods 21 Nov 2018
Flights and favorite turf photos of 2017 29 Dec 2017

phosphorus

This is why you replicate 14 Sep 2020
Algae, sand, and phosphorus 10 May 2020
It is difficult to run a fertilizer down the field when the corn is six feet high 10 Apr 2020
Can you see the P? 21 Dec 2019
Phosphorus deficiency symptoms in the control plots 31 Jul 2017
Can we guess how low the P is here 26 Jul 2017

plant growth regulator

Nutranta seminar at Manila Southwoods 21 Nov 2018

playability

Key things to know about high quality turf surfaces 16 Nov 2020
Numerical notes from Nikanti GC 01 Aug 2020
Surface hardness of eight grass species on putting greens 19 Apr 2020
Four tools to measure surface hardness 18 Apr 2020
Nutranta seminar at Manila Southwoods 21 Nov 2018
Rituals, surrogate markers, and turf performance outcomes 16 Sep 2018
A pleasant day, with an unpleasant termination 10 Jul 2018
If the greens are too hard, how to make them soft? 05 Feb 2018
"My frustration in not being able to increase our green speed" 14 Jul 2017

poa annua

Competition, stress, and disturbance 31 Oct 2019

podcast

What do Ninja tines, PoaCure, ClipVol, the Smith-Kerns disease model, ball roll, and MLSN have in common? 20 Aug 2020
When this goes off the rails, it goes way off the rails 28 Oct 2019
New ATC Media Library with videos, podcasts, and more 28 Sep 2019
It's a zero-based program 20 Aug 2019
The Cornell Turf Talk Podcast with Special Guest David Hicks 10 Jul 2019
An important Conference takes place between Mr. Gulotti and Andrew McDaniel 21 Feb 2019
Guest on the Talking Greenkeeper show 06 Nov 2018
"Hell, I did that 30 years ago" 29 Sep 2018

portugal

Flights and favorite turf photos of 2017 29 Dec 2017

potassium

This is why you replicate 14 Sep 2020
How MLSN works 27 May 2020
Updated K calculator 03 Mar 2020
Dandelions and potassium 25 Dec 2019
After 17 inches of rain, how much K leached? 03 Aug 2018
"Potassium applications have been associated with increased winter diseases in northern climates" 27 Sep 2017
Have you seen turf that ran out of potassium? 06 Aug 2017

presentation

New ATC Media Library with videos, podcasts, and more 28 Sep 2019

research

Soil test showdown 21 Dec 2020
Fun on my front steps 14 Oct 2020
This is why you replicate 14 Sep 2020
Three #rturf projects: green speed & clipvol, zoysia response to fertilizer during grow-in, and report automation 26 Aug 2020
Hollow-tine cultivation and solid-tine spiking both failed to alleviate summer bentgrass decline 24 Jul 2020
Have we been doing it all wrong? Soil testing and composite samples 20 Jul 2020
Twice the growth at a different mowing height 24 Jun 2020
Roots on grass supplied with N, P, and K 06 Apr 2020
Roots on grass kept deficient in P and K 03 Apr 2020
Turfgrass soil sampling, part 7 of 7 09 Feb 2020
Turfgrass soil sampling, part 6 of 7 07 Feb 2020
Turfgrass soil sampling, part 5 of 7 06 Feb 2020
Turfgrass soil sampling, part 4 of 7 05 Feb 2020
Turfgrass soil sampling, part 3 of 7 04 Feb 2020
Turfgrass soil sampling, part 2 of 7 03 Feb 2020
Turfgrass soil sampling, part 1 of 7 02 Feb 2020
Experiment update: fertilizer response at planting 17 Nov 2019
Fertilizer response at planting 29 Oct 2019
When this goes off the rails, it goes way off the rails 28 Oct 2019
Establishment time: zoysia grow-in from stolons 22 Jul 2019
Autonomous mower at 12 mm produced higher quality turf, increased shoot density, and reduced energy use compared to a conventional reel mower 08 Dec 2018
Is it turf grass, or turfgrass? 28 Sep 2018
Presentation videos from the 2017 ASHS conference 21 Oct 2017
Thailand putting green performance in July: a summary 06 Sep 2016

roll

Rolling, nitrogen, dollar spot, and Microdochium patch 23 Mar 2020

roots

When grass grows more, it makes more roots 17 Apr 2020
The top 10 posts from the old blog 11 Dec 2019

roundup

A non-comprehensive list of awesome turfgrass things other people did this year 28 Dec 2020
A non-comprehensive list of awesome turfgrass things other people did this year 31 Dec 2019
A non-comprehensive list of awesome turfgrass things other people did this year 30 Dec 2018
Monthly Turfgrass Roundup: November 2018 03 Dec 2018
Monthly Turfgrass Roundup: October 2018 04 Nov 2018
Monthly Turfgrass Roundup: September 2018 09 Oct 2018
Monthly Turfgrass Roundup: August 2018 13 Sep 2018
Monthly Turfgrass Roundup: July 2018 09 Aug 2018
Monthly Turfgrass Roundup: June 2018 09 Jul 2018
Monthly Turfgrass Roundup: May 2018 05 Jun 2018
Monthly Turfgrass Roundup: April 2018 03 May 2018
Monthly Turfgrass Roundup: March 2018 09 Apr 2018
Monthly Turfgrass Roundup: February 2018 05 Mar 2018
Monthly Turfgrass Roundup: January 2018 08 Feb 2018
Monthly Turfgrass Roundup: December 2017 10 Jan 2018
A non-comprehensive list of awesome turfgrass things other people did this year 24 Dec 2017
Monthly Turfgrass Roundup: November 2017 03 Dec 2017
Monthly Turfgrass Roundup: October 2017 02 Nov 2017
Monthly Turfgrass Roundup: September 2017 08 Oct 2017
Monthly Turfgrass Roundup: August 2017 07 Sep 2017
Monthly Turfgrass Roundup: July 2017 07 Aug 2017
Monthly Turfgrass Roundup: June 2017 03 Jul 2017
Monthly Turfgrass Roundup: October 2016 04 Nov 2016
Monthly Turfgrass Roundup: September 2016 11 Oct 2016
Monthly Turfgrass Roundup: August 2016 10 Sep 2016

rturf

Three #rturf projects: green speed & clipvol, zoysia response to fertilizer during grow-in, and report automation 26 Aug 2020

salinity

MLSN and salinity 26 May 2020
It doesn't have to be so complicated 15 Jul 2018

sand

Sand topdressing by exact depth: how to work it out 24 Dec 2020
Putting green organic matter by depth in the soil 13 May 2020
Sand topdressing by growth rate and clipping volume 01 May 2020
Three reasons why sand topdressing is best expressed as a depth 08 Aug 2019
Total organic matter testing on putting greens: sample number and sample volume 29 Jul 2019
This one simple trick can transform putting greens from usually good to consistently great 25 Jun 2019
Verdure removal (or not) in turfgrass soil profile organic matter tests 19 Jun 2019
Temperature for loss on ignition in turfgrass soils 14 Jun 2019
Measuring organic matter 10 Jun 2019
Thinking about sand 09 Jun 2019
It doesn't have to be so complicated 15 Jul 2018
A pleasant day, with an unpleasant termination 10 Jul 2018
Topdressing frequency on golf course putting greens in Japan 20 Dec 2017

science

Three #rturf projects: green speed & clipvol, zoysia response to fertilizer during grow-in, and report automation 26 Aug 2020
Hollow-tine cultivation and solid-tine spiking both failed to alleviate summer bentgrass decline 24 Jul 2020
Have we been doing it all wrong? Soil testing and composite samples 20 Jul 2020
Turfgrass soil sampling, part 7 of 7 09 Feb 2020
Turfgrass soil sampling, part 6 of 7 07 Feb 2020
Turfgrass soil sampling, part 5 of 7 06 Feb 2020
Turfgrass soil sampling, part 4 of 7 05 Feb 2020
Turfgrass soil sampling, part 3 of 7 04 Feb 2020
Turfgrass soil sampling, part 2 of 7 03 Feb 2020
Turfgrass soil sampling, part 1 of 7 02 Feb 2020
I forgot this one too 13 Nov 2019
Competition, stress, and disturbance 31 Oct 2019
When this goes off the rails, it goes way off the rails 28 Oct 2019
So many things to learn about in this world 11 Oct 2019
Is it turf grass, or turfgrass? 28 Sep 2018
What we talked about 27 Sep 2018
Rituals, surrogate markers, and turf performance outcomes 16 Sep 2018
Managing turfgrass diseases in Asia with minimal input 30 Jul 2018
Is carbon "the next frontier in fertilization?" 31 May 2018
The probability of a dollar spot epidemic 30 May 2018

seminar

Thai GCSA seminar: improving playing conditions and optimizing work efficiency 14 Dec 2020
The Flying Blind trailer: 8 things to know, measure, and adjust 12 Dec 2020
7 things I've learned about turfgrass around the world 08 Dec 2020
Still Learning: the official trailer 29 Nov 2020
Key things to know about high quality turf surfaces 16 Nov 2020
The BIGGA National Regional Conference in November 04 Oct 2020
Webinar recording: critical maintenance this year 08 May 2020
April 27 webinar on critical maintenance in 2020 21 Apr 2020
Catching up with my reading 17 Jan 2020
Ten posts no one read in 2019 10 Jan 2020
Highlights from three seminars in Copenhagen 06 Dec 2019
Three hours of an MLSN seminar on just one slide 30 Nov 2019
Quick screencast of my continuous improvement system presentation 25 Nov 2019
Grammatik for greenkeepere, plus buckets and stimp stats 12 Nov 2019
Online education through GreenKeeper University 08 Nov 2019
My presentations at the Oregon GCSA fall meeting 07 Nov 2019
Handout for the OGCSA fall meeting 05 Nov 2019
MLSN seminar series in Sweden 17 Oct 2019
A continuous improvement system for turfgrass 08 Sep 2019
Three seminars with the Oregon GCSA 20 Aug 2019
Pitch performance workshop in Bangkok 16 Aug 2019
3 presentations at the Czech Greenkeepers Association conference 14 Dec 2018
Organic matter and green speed at the 40th Spanish Greenkeepers Congress 01 Dec 2018
Nutranta seminar at Manila Southwoods 21 Nov 2018
Recording of my presentation about managing turfgrass diseases in Asia 15 Sep 2018
Managing turfgrass diseases in Asia with minimal input 30 Jul 2018
Grass and soil for sports turf in Thailand 24 Jul 2018
"You have been featured - Golf Digest India May 2018" 04 May 2018
Recording of my #ClipVol webinar at TurfNet 24 Apr 2018
Leaves of grass 11 Mar 2018
"I really wish that I could hear this presentation" 08 Mar 2018
Turf conditions, efficiency, and the 'Grammar of Greenkeeping' 14 Feb 2018
I've got a new slide 11 Feb 2018
My four presentations at BTME 24 Jan 2018
Is the MLSN value the average? 02 Dec 2017
Representing the distribution of a lot of numbers 01 Dec 2017
Minimalist turfgrass nutrition 27 Nov 2017
Turf around the world, with a couple maps 15 Nov 2017
Presentation videos from the 2017 ASHS conference 21 Oct 2017
My presentations in Coeur d'Alene 19 Oct 2017
I just bought a plane ticket to Manchester 16 Aug 2017
Coming up in October 27 Jul 2017
Turfgrass at a Tourism Convention 21 Jul 2017

shade

Turf stories as Twitter Moments 22 May 2018
"I really wish that I could hear this presentation" 08 Mar 2018

soccer

Making natural grass work for grassroots football 28 Oct 2018
Grass and soil for sports turf in Thailand 24 Jul 2018

social media

Turfgrass industry social network use for work 11 Aug 2017

sod

Converting grass stolon planting rates from bushels to mass per area 23 Sep 2017

soil

Do you need to add beneficial microbes to the soil to make it function properly? 18 Feb 2019
Nitrogen, rain, and starting point estimates 12 Sep 2018
A soil temperature turfhack 10 Aug 2018
It doesn't have to be so complicated 15 Jul 2018
Predicting organic matter in turfgrass soils 29 Jun 2018
"Relative to their own requirements, animals and microbes live in a carbon-rich, nitrogen-poor world" 01 Jun 2018
Is carbon "the next frontier in fertilization?" 31 May 2018
Turf stories as Twitter Moments 22 May 2018
I've got a new slide 11 Feb 2018
New MLSN cheat sheet 03 Feb 2018
More than a success story 20 Jan 2018
I've been asked to give a seminar on MLSN guidelines 13 Jan 2018
"Percent base saturation seems not to be a particularly useful concept" 16 Sep 2017
MLSN in use: soil tests, fertilizer, and the results 24 Aug 2017
An economic case study 05 Jul 2017

soil biology

Do you need to add beneficial microbes to the soil to make it function properly? 18 Feb 2019

soil moisture

5 examples of Goodhart's law in turfgrass management 04 Dec 2020

soil test

Soil test showdown 21 Dec 2020
5 examples of Goodhart's law in turfgrass management 04 Dec 2020
Organic matter separation from turfgrass soil samples 25 Nov 2020
Total organic matter at the surface of warm-season grass putting greens 08 Oct 2020
Total organic matter at the surface of cool-season grass putting greens 06 Oct 2020
Updated K calculator 03 Mar 2020
Dandelions and potassium 25 Dec 2019
Can you see the P? 21 Dec 2019
The top 10 posts from the old blog 11 Dec 2019
Time for a new excuse 29 Sep 2019
Regarding how soil tests work 08 Mar 2019
Do you need to add beneficial microbes to the soil to make it function properly? 18 Feb 2019
Humbug, the MLSN movie 29 Nov 2018
Airplane fuel requirements, soil test calcium, and MLSN 07 Sep 2018
After 17 inches of rain, how much K leached? 03 Aug 2018
Two solutions for the problems of turfgrass fertilizer recommendations 07 Jul 2018
Fixing these issues in one fell swoop 23 Dec 2017
"I am curious about your stance on nutrients in irrigation water ..." 04 Dec 2017
Is the MLSN value the average? 02 Dec 2017
Representing the distribution of a lot of numbers 01 Dec 2017
Phosphorus deficiency symptoms in the control plots 31 Jul 2017
Can we guess how low the P is here 26 Jul 2017

soil testing

A Tale of Two Tests 02 Dec 2020
A quick geographical estimate of MLSN reach 21 Jul 2020
Have we been doing it all wrong? Soil testing and composite samples 20 Jul 2020
Variation in rootzone organic matter (humus) from point to point on the same green 08 Jul 2020
How much does total organic matter vary within the same green? 06 Jul 2020
Four more sources for MLSN information 22 May 2020
Brand new MLSN webinar this Friday 18 May 2020
A new article about MLSN fertilization on golf courses 17 May 2020
It is difficult to run a fertilizer down the field when the corn is six feet high 10 Apr 2020
Why soil pH should usually be kept above 5.5 14 Mar 2020
Soil organic matter: a bullet list 17 Feb 2020
Winter grass color, zoysia, and soil 11 Feb 2020
Turfgrass soil sampling, part 7 of 7 09 Feb 2020
Turfgrass soil sampling, part 6 of 7 07 Feb 2020
Turfgrass soil sampling, part 5 of 7 06 Feb 2020
Turfgrass soil sampling, part 4 of 7 05 Feb 2020
Turfgrass soil sampling, part 3 of 7 04 Feb 2020
Turfgrass soil sampling, part 2 of 7 03 Feb 2020
Turfgrass soil sampling, part 1 of 7 02 Feb 2020
The amount of potassium leached after rain on 10 of 11 days 29 Jan 2020
Catching up with my reading 17 Jan 2020
A continuous improvement system for turfgrass 08 Sep 2019
Geographical analysis of those using MLSN 15 Aug 2017
Have you seen turf that ran out of potassium? 06 Aug 2017

spain

Webinar recording: critical maintenance this year 08 May 2020
April 27 webinar on critical maintenance in 2020 21 Apr 2020
Flights and favorite turf photos of 2018 20 Jan 2019
Organic matter and green speed at the 40th Spanish Greenkeepers Congress 01 Dec 2018

sports

Pitch performance workshop in Bangkok 16 Aug 2019
The SportsTurf Interview: Dr. Micah Woods 06 Jun 2019
Making natural grass work for grassroots football 28 Oct 2018
Grass and soil for sports turf in Thailand 24 Jul 2018

stimpmeter

Flying Blind: the episode you've been waiting for 16 Dec 2020
Thai GCSA seminar: improving playing conditions and optimizing work efficiency 14 Dec 2020
5 examples of Goodhart's law in turfgrass management 04 Dec 2020

surface hardness

Numerical notes from Nikanti GC 01 Aug 2020
Putting green speed, surface hardness, and clipping volume 22 Sep 2019

sustainability

Of conventional mowers, electric mowers, and electricity generation 02 May 2019
Autonomous mower at 12 mm produced higher quality turf, increased shoot density, and reduced energy use compared to a conventional reel mower 08 Dec 2018
Turfgrass at a Tourism Convention 21 Jul 2017

sweden

Three hours of an MLSN seminar on just one slide 30 Nov 2019
MLSN seminar series in Sweden 17 Oct 2019

temperature

The soil temperature #TurfHack works again 27 Apr 2019
Genki level pamphlet 07 Apr 2019
Is it temperature or day length? 17 Mar 2019
Tokyo temperatures and growth potential, animated 10 Mar 2019
Four reasons zoysia should be a poor choice for California 15 Oct 2018
Catching up on my reading, heat stress edition 23 Sep 2018
A soil temperature turfhack 10 Aug 2018
Temperature and zoysia 23 Jul 2018
The Palm Springs inflection date in 2017 13 Nov 2017
Warm-season grass, autumn temperatures, and winter overseeding 05 Nov 2017
GP is a number. It's explained here in photos and words. 01 Sep 2017

thailand

Thai GCSA seminar: improving playing conditions and optimizing work efficiency 14 Dec 2020
Worldwide agroclimatology data, PAR, shade, and grass 28 Nov 2020
Sodding highway median strips with zoysia 14 Nov 2020
The cause of these spots may surprise you 12 Aug 2020
Numerical notes from Nikanti GC 01 Aug 2020
To walk or to ride, a difficult decision 19 Jul 2020
Flights and favorite turf photos of 2019 02 Jan 2020
Smoother fairways with a 10 ton vibratory roller 17 Aug 2019
Pitch performance workshop in Bangkok 16 Aug 2019
Establishment time: zoysia grow-in from stolons 22 Jul 2019
Turf color, consistency, and the oldest course in Thailand 05 Jun 2019
The soil temperature #TurfHack works again 27 Apr 2019
Half-aerified greens; sodded fairway stripes; with other interesting and informative matters 19 Mar 2019
Flights and favorite turf photos of 2018 20 Jan 2019
Grass and soil for sports turf in Thailand 24 Jul 2018
Javagrass lawns in Bangkok 18 Mar 2018
When does it usually rain in Bangkok? 09 Feb 2018
Flights and favorite turf photos of 2017 29 Dec 2017
The growth, nutrient use, and water use of 3 grasses in central Thailand 25 Sep 2017
Turfgrass at a Tourism Convention 21 Jul 2017
Thailand putting green performance in July: a summary 06 Sep 2016

tissue testing

Ten posts no one read in 2019 10 Jan 2020
Pretty hopeless in predicting deficiency 05 Mar 2019
MLSN for leaf tissue 30 Sep 2018
Tissue testing and gas mileage 30 Apr 2018
Tissue testing for turfgrass 09 Aug 2017
Tissue testing: sometimes my own words come back to haunt me 08 Aug 2017
Tissue testing: aiming at the wrong target 07 Aug 2017

topdress

Updated spreadsheets for sand topdressing by GP 03 Aug 2020
Putting green organic matter by depth in the soil 13 May 2020
Sand topdressing by growth rate and clipping volume 01 May 2020
Ball bounce on greens after 7 days of rain 27 Aug 2019
A pleasant day, with an unpleasant termination 10 Jul 2018
Predicting organic matter in turfgrass soils 29 Jun 2018
Learn the rules like a pro, so you can break them like an artist 05 Apr 2018
The case for reactive greenkeeping 01 Apr 2018
Topdressing frequency on golf course putting greens in Japan 20 Dec 2017
Sand topdressing and growth potential 03 Sep 2017
Sand topdressing to match grass growth 20 Aug 2017

topdressing

Sand topdressing by exact depth: how to work it out 24 Dec 2020

tournament

Temperature-based growth potential (GP) in April and November 30 Apr 2020
Insight from Andrew Thomson's Presidents Cup Diary 11 Dec 2019
Putting green speed, surface hardness, and clipping volume 22 Sep 2019
Ball bounce on greens after 7 days of rain 27 Aug 2019
Kurofune keeper 18 Nov 2018
Kurofune keeper 17 Nov 2018
Top 25 turfgrass tweets of the 2018 Ryder Cup 18 Oct 2018
What we talked about 27 Sep 2018
Shopping for magazines in 7-11 at 4 a.m. 14 Sep 2018
A pleasant day, with an unpleasant termination 10 Jul 2018
Turf stories as Twitter Moments 22 May 2018
How to spend less than $5,000 on tournament green fertilizer 23 Aug 2017
A lot more than your average tournament 18 Aug 2017
Morning clipping volume during tournament week at KBC Augusta 14 Aug 2017

turf info

The top 10 posts of 2020 30 Dec 2020
The top 10 posts of 2019 26 Dec 2019
The ATC Turfgrass Library 09 Apr 2019
The top 10 posts of 2018 02 Jan 2019
What's the best way to keep up with all you're doing? 16 Sep 2018
Posts are now tagged by topic 13 Jun 2018
"After a pimento cheese sandwich and a Masters club ..." 28 Feb 2018
Turf conditions, efficiency, and the 'Grammar of Greenkeeping' 14 Feb 2018
If you are reading this by email ... 13 Feb 2018
The top 10 posts of 2017 30 Dec 2017

turf mystery

The cause of these spots may surprise you 12 Aug 2020

turf tourism

Sodding highway median strips with zoysia 14 Nov 2020
To walk or to ride, a difficult decision 19 Jul 2020
Radish seedlings on a bentgrass nursery after fumigation 29 Jun 2020
Ten posts no one read in 2019 10 Jan 2020
Flights and favorite turf photos of 2019 02 Jan 2020
Turf color, consistency, and the oldest course in Thailand 05 Jun 2019
Half-aerified greens; sodded fairway stripes; with other interesting and informative matters 19 Mar 2019
A golfers' paradise 28 Jan 2019
Flights and favorite turf photos of 2018 20 Jan 2019
Botanizing at Nippon Treasure Links 10 Oct 2018
Shopping for magazines in 7-11 at 4 a.m. 14 Sep 2018
Piper and Pebble Beach 20 Aug 2018
3 reasons sheep are better than cows for mowing fairways 24 Nov 2013

turfgrass history

The turfgrass twilight zone 01 Oct 2018
Is it turf grass, or turfgrass? 28 Sep 2018

turfgrass management

No magic bullets in plant nutrition 15 Apr 2020
Online education through GreenKeeper University 08 Nov 2019
It's a zero-based program 20 Aug 2019
Attacked vigorously from every quarter 23 Oct 2018
"Nothing to do with whether or not it works" 21 Oct 2018
What we talked about 27 Sep 2018
Three distinct ways I've thought about turfgrass management 13 Sep 2017

turfgrass speedo

The turfgrass genki level, part 5: what's real, what's not, & the simplicity of this 18 Feb 2019
The turfgrass genki level, part 4: a normalized comparison of N fertilizer to growth rate 15 Feb 2019
The turfgrass genki level, part 3: turf growth response measured by clippings 10 Feb 2019

turfhacks

Sand topdressing by exact depth: how to work it out 24 Dec 2020
Radish seedlings on a bentgrass nursery after fumigation 29 Jun 2020
None of the expensive fertilizer programs were superior to that of urea and iron 19 Mar 2020
Simple, idiot proof, and inexpensive 17 Mar 2020
The soil temperature #TurfHack works again 27 Apr 2019
A soil temperature turfhack 10 Aug 2018

turfreads

7 things I've learned about turfgrass around the world 08 Dec 2020
A "new" column, starting with creeping bentgrass heat stress 31 Aug 2020
A new article about MLSN fertilization on golf courses 17 May 2020
No magic bullets in plant nutrition 15 Apr 2020
None of the expensive fertilizer programs were superior to that of urea and iron 19 Mar 2020
New technologies, ethics, and money 28 Feb 2020
Asking the right questions 26 Feb 2020
Quacks and Suckers 24 Feb 2020
Ten posts no one read in 2019 10 Jan 2020
The ATC Turfgrass Library 09 Apr 2019
One bucket at a time 27 Dec 2018
Kurofune keeper 18 Nov 2018
Kurofune keeper 17 Nov 2018

usa

Flights and favorite turf photos of 2019 02 Jan 2020
Flights and favorite turf photos of 2018 20 Jan 2019

verdure

Three reasons why sand topdressing is best expressed as a depth 08 Aug 2019
Total organic matter testing on putting greens: sample number and sample volume 29 Jul 2019
This one simple trick can transform putting greens from usually good to consistently great 25 Jun 2019
Verdure removal (or not) in turfgrass soil profile organic matter tests 19 Jun 2019

video

Soil test showdown 21 Dec 2020
Flying Blind: the episode you've been waiting for 16 Dec 2020
The Flying Blind trailer: 8 things to know, measure, and adjust 12 Dec 2020
7 things I've learned about turfgrass around the world 08 Dec 2020
Still Learning: the official trailer 29 Nov 2020
What do Ninja tines, PoaCure, ClipVol, the Smith-Kerns disease model, ball roll, and MLSN have in common? 20 Aug 2020
How MLSN works 27 May 2020
Webinar recording: critical maintenance this year 08 May 2020
Catching up with my reading 17 Jan 2020
Quick screencast of my continuous improvement system presentation 25 Nov 2019
New ATC Media Library with videos, podcasts, and more 28 Sep 2019
Establishment time: zoysia grow-in from stolons 22 Jul 2019
The turfgrass genki level, part 5: what's real, what's not, & the simplicity of this 18 Feb 2019
Humbug, the MLSN movie 29 Nov 2018
The new MLSN movie trailer 17 Nov 2018
Making natural grass work for grassroots football 28 Oct 2018
Recording of my presentation about managing turfgrass diseases in Asia 15 Sep 2018
A pleasant day, with an unpleasant termination 10 Jul 2018
Two solutions for the problems of turfgrass fertilizer recommendations 07 Jul 2018
Recording of my #ClipVol webinar at TurfNet 24 Apr 2018
Leaves of grass 11 Mar 2018
"I really wish that I could hear this presentation" 08 Mar 2018
3 reasons sheep are better than cows for mowing fairways 24 Nov 2013

water

5 examples of Goodhart's law in turfgrass management 04 Dec 2020
Bermudagrass, zoysiagrass, and water use 23 May 2020
Big differences between species 31 Jan 2020
Post-rain growth flush from nitrogen in the rain or nitrogen from the soil 09 Jul 2019
Can you spot the grass that did not get enough water? 21 Jan 2019
Four reasons zoysia should be a poor choice for California 15 Oct 2018
Drought, bermudagrass, and zoysiagrass 15 Oct 2018
After 17 inches of rain, how much K leached? 03 Aug 2018
Learn the rules like a pro, so you can break them like an artist 05 Apr 2018
GP is a number. It's explained here in photos and words. 01 Sep 2017

weather

The last year of DLI with weekly averages 30 Nov 2020
Worldwide agroclimatology data, PAR, shade, and grass 28 Nov 2020
Ten posts no one read in 2019 10 Jan 2020
Ball bounce on greens after 7 days of rain 27 Aug 2019
Nitrogen, rain, and starting point estimates 12 Sep 2018
Smith-Kerns and korai 17 Jun 2018
The probability of a dollar spot epidemic 30 May 2018
Year to date rain, and bermudagrass quality 16 Nov 2017

web/tech

The top 10 posts of 2020 30 Dec 2020
Eleven years of website visits by device type 27 Apr 2020
Updated post archives 31 Mar 2020
Updated K calculator 03 Mar 2020
Ranking Turf Twitter in 2019 20 Jan 2020
Ten posts no one read in 2019 10 Jan 2020
The top 10 posts of 2019 26 Dec 2019
Online education through GreenKeeper University 08 Nov 2019
Ranking Turf Twitter in 2018 31 Jan 2019
Ten posts that no one read in 2018 27 Jan 2019
BTME 2019 on Twitter 27 Jan 2019
The top 10 posts of 2018 02 Jan 2019
Top 25 turfgrass tweets of the 2018 Ryder Cup 18 Oct 2018
What's the best way to keep up with all you're doing? 16 Sep 2018
Posts are now tagged by topic 13 Jun 2018
ATC website visits by device type 22 Apr 2018
Three recent conversations 16 Apr 2018
Looking at times and words from ten thousand tweets 07 Mar 2018
If you are reading this by email ... 13 Feb 2018
Turfgrass Twitter Analysis 09 Jan 2018
The top 10 posts of 2017 30 Dec 2017
Ten posts that no one read in 2017 21 Dec 2017

webinar

April 27 webinar on critical maintenance in 2020 21 Apr 2020

weeds

Dandelions and potassium 25 Dec 2019
When this goes off the rails, it goes way off the rails 28 Oct 2019
The turfgrass twilight zone 01 Oct 2018
Paspalum and manilagrass lawns 21 May 2018

zoysia

Sodding highway median strips with zoysia 14 Nov 2020
Fun on my front steps 14 Oct 2020
This is why you replicate 14 Sep 2020
Bermudagrass stolons and zoysiagrass rhizomes 09 Sep 2020
Three #rturf projects: green speed & clipvol, zoysia response to fertilizer during grow-in, and report automation 26 Aug 2020
The cause of these spots may surprise you 12 Aug 2020
To walk or to ride, a difficult decision 19 Jul 2020
Bermudagrass, zoysiagrass, and water use 23 May 2020
When grass grows more, it makes more roots 17 Apr 2020
Roots on grass supplied with N, P, and K 06 Apr 2020
Roots on grass kept deficient in P and K 03 Apr 2020
Turf performance and the lifespan of individual grass leaves 25 Mar 2020
Winter grass color, zoysia, and soil 11 Feb 2020
Big differences between species 31 Jan 2020
Experiment update: fertilizer response at planting 17 Nov 2019
Fertilizer response at planting 29 Oct 2019
Establishment time: zoysia grow-in from stolons 22 Jul 2019
The soil temperature #TurfHack works again 27 Apr 2019
Is it temperature or day length? 17 Mar 2019
Can you spot the grass that did not get enough water? 21 Jan 2019
Four reasons zoysia should be a poor choice for California 15 Oct 2018
Drought, bermudagrass, and zoysiagrass 15 Oct 2018
Temperature and zoysia 23 Jul 2018
A pleasant day, with an unpleasant termination 10 Jul 2018
Smith-Kerns and korai 17 Jun 2018
Flights and favorite turf photos of 2017 29 Dec 2017
Presentation videos from the 2017 ASHS conference 21 Oct 2017
The growth, nutrient use, and water use of 3 grasses in central Thailand 25 Sep 2017
Converting grass stolon planting rates from bushels to mass per area 23 Sep 2017
How to spend less than $5,000 on tournament green fertilizer 23 Aug 2017
A lot more than your average tournament 18 Aug 2017
Morning clipping volume during tournament week at KBC Augusta 14 Aug 2017
Clipping volume, or clipping weight? 04 Jul 2017