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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
More on the daily soil water balance
How much irrigation is required at a particular location? That is an interesting question, and one gets widely different answers depending on the method used for calculation. The standard method involves taking the consumptive water use and subtracting the effective rainfall.
Micah Woods
Last updated on 2024-10-16
4 min read
Daily versus monthly calculations of ET and irrigation requirement
I showed how weather data can be used to calculate a daily soil water balance. One can adjust the rootzone characteristics, and the timing and amount of irrigation, so that the calculations are representative of what one wants to know.
Micah Woods
Last updated on 2024-10-16
2 min read
The daily soil water balance at Sapporo from 2013 to 2016
One can calculate a water budget for a particular location to get an estimate of how much irrigation water is required. This article from the Green Section Record describes those calculations.
Micah Woods
Last updated on 2024-10-16
1 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
"How do you calculate how much water is needed for a given area?"
I received this inquiry by email: When looking at water quantity for a new golf course, you have to determine how much water is needed obviously so what I want to know is
Micah Woods
Last updated on 2024-10-16
1 min read
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