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water
No matter how much sodium one puts into a sand rootzone, the soil structure cannot be affected, so gypsum won’t be required
I received this question about leaching salts from the rootzone: “I remember talking to you once before regarding flushing excess salts from the root zone and the application of gypsum or other calcium products before the flush and you telling me it was not necessary.
Micah Woods
Last updated on 2021-04-15
2 min read
“Is there a particular reason why you think it’s a poor way to fertilise?”
A correspondent wrote: I’m hoping to get your thoughts on something I came across today. I was discussing greens fertilising whilst at a friend’s course this morning. He went on to get his new toy, the […] He’s started to use the salinity level reading as an indicator to fertilise.
Micah Woods
2017-06-15
5 min read
How much N is in rain and snow?
When I wrote this post back in 2017, I’d just had a conversation about this very question. “I think it is a tiny amount,” I said, “although sometimes I hear really large amounts when people tell me how much N comes in rain.
Micah Woods
Last updated on 2021-04-15
2 min read
MacKenzie's fundamental principle of greenkeeping
I taught two seminars at the 2017 Philippine Golf Course Management conference. One was about MLSN after 5 years. I explained what soil test interpretation is, why the MLSN guidelines were developed, and explained how they work.
Micah Woods
Last updated on 2021-04-07
1 min read
Simulating irrigation frequency at the world famous "snake" course
Many of you will have seen the Kantarat Golf Course when flying into Bangkok. Maybe you’ve played it. It sits between the two runways at Don Mueang International Airport in Bangkok.
Micah Woods
Last updated on 2021-07-05
2 min read
Does soil water content affect nighttime soil temperatures in summer?
I was wondering what the effect was. I expected a 1 or 2 °C decrease in nighttime soil temperature in drier soils, compared to soils with more water. I didn’t find it.
Micah Woods
2016-06-26
1 min read
Misleading, irrelevant, or just plain wrong
I taught five seminars at the Northern Green Expo in 2016. The (New) Fundamentals of Turfgrass Nutrition Nutrient Use by the Grass and Nutrient Supply by the Soil Calculating the Fertilizer Requirement for any Turfgrass, Anywhere
Micah Woods
Last updated on 2021-09-26
1 min read
What do wetting agents really do?
There is a fine article by Karcher and Richardson in GCM about the effect of wetting agents. In the article, they point out something important: It is often stated that some wetting agents move water rapidly through the root zone while other products retain considerable moisture near the surface, but the data to substantiate such claims is limited.
Micah Woods
Last updated on 2021-12-30
2 min read
Even at extremely high concentrations, the bicarbonate did not seal off the soil
When it comes to fearmongering in turfgrass, I’m not sure there is a bigger one than bicarbonate (HCO3-). One often hears of supposed problems associated with bicarbonate. I’m still waiting to see a soil or turfgrass problem associated with this ubiquitous anion.
Micah Woods
Last updated on 2021-06-09
2 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
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