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research
Is this right? 73% of samples from good turf actually require more fertilizer?
In the Global Soil Survey (GSS), we looked at the soil nutrient levels in soil that was specially selected as being from areas where the grass is growing well. The first year of GSS data are available here.
Micah Woods
Last updated on 2021-04-14
1 min read
Conventional nutrient guidelines: explaining what I mean by "broken"
This is no secret among turfgrass scientists—there isn’t a lot of good justification to support what we call conventional guidelines for soil nutrients in turfgrass. And by that, I mean the conventional guidelines are broken.
Micah Woods
Last updated on 2021-05-30
4 min read
It cures fairy ring and prevents fungal pathogens: an anecdote about ammonium sulfate
Fairy ring symptoms, 8 green, August 2013 In 2013, at the KBC Augusta golf tournament, there was some type 2 fairy ring on the 8th green of host Keya Golf Club.
Micah Woods
2014-08-28
4 min read
Increasing potassium “may impart a negative effect on drought resistance”
Does adding more potassium improve drought resistance? This article by Rowland et al. takes an in-depth look at that important question. They looked at bermudagrass (Tifeagle and Tifdwarf), seashore paspalum (SeaDwarf), and zoysia (PristineFlora) grown in a USGA sand rootzone.
Micah Woods
Last updated on 2021-07-04
2 min read
Spots of excitement in a boring experiment
Doug Soldat reports on descreased pink snow mold associated with low soil potassium. First he describes the study: In 2011, we began a trial to attempt to identify the lowest level of soil potassium that would still provide high putting green quality.
Micah Woods
Last updated on 2021-07-05
3 min read
More advantages of frequent irrigation
Update: I’m adding a note here today (21 Nov 2017) to correct and clarify about these data. Mike Richardson pointed out to me that the “differences from plots irrigated to field capacity 2X or 6X / wk were small and not significant” in this experiment.
Micah Woods
Last updated on 2017-11-21
2 min read
Relationship between soil water content and turfgrass surface hardness
I use the terms surface hardness and surface firmness interchangeably, but I usually prefer surface hardness. In the report I prepared in August 2012 I included this figure, showing the relationship I measured between soil water content (using a Delta-T Device Theta Probe with 6 cm rods) and surface hardness (using a 500 g Clegg Impact Soil Tester).
Micah Woods
Last updated on 2021-04-07
2 min read
Does extra potassium improve bermudagrass performance when soil sodium is high?
The short answer is no, so long as sufficient potassium (K) is present in the soil. Cisar et al. looked at Tifway bermudagrass performance when the soil contained high amounts of sodium (Na).
Micah Woods
2013-08-04
2 min read
Summertime syringing to cool bentgrass greens: I wouldn’t do it today
@asianturfgrass many Japanese greenkeepers believe that syringing is effective to keep or lower leaf temperature. How do you think about it? — H.I.GK (@fc3s_13b) May 5, 2013 This question about lowering leaf temperature prompted an extensive discussion about the effectiveness of syringing greens.
Micah Woods
Last updated on 2021-05-07
5 min read
Which is a stronger grass, Paspalum or Zoysia?
One of the most interesting articles you can read about seashore paspalum and weeds in the climate of East and Southeast Asia is Spatial and Temporal Dynamics of the Weed Community in a Seashore Paspalum Turf by Xie et al.
Micah Woods
Last updated on 2023-05-27
3 min read
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