water

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.

The evapotranspiration (ET) is a useful value for turfgrass managers. [This calculator][2] using the Hargreaves equation to estimate ETo is now, thanks to translation by Yukio Ueno, [available in Japanese][3].

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

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

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.

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.

I’ve used equation 52 in Crop Evapotranspiration: Guidelines for computing crop water requirements (FAO Irrigation and Drainage Paper 56) to calculate the predicted ETo for San Digeo, California, and for Madison, Wisconsin.

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.