water

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.

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.

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.

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.

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.

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.

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.

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.

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.

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