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. I have since discovered that same conclusion for myself. I… Continue reading No matter how much sodium one puts into a sand rootzone, the soil structure cannot be affected, so gypsum won’t be required

“Don’t try to jump on his bandwagon”

Jon Scott wrote to me about my recent post on a poor way to fertilise. “While this superintendent has solved his problem of nitrogen input by monitoring salinity level that has worked for him, this is probably a very unique situation. It may be relevant to other golf courses where similar salt levels exist, but… Continue reading “Don’t try to jump on his bandwagon”

“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. So he’s found a number… Continue reading “Is there a particular reason why you think it’s a poor way to fertilise?”

My presentation on irrigation water quality

Yesterday I taught a seminar about irrigation water quality. Here are some links related to that presentation. View or download the presentation slides here Harivandi’s Interpreting turfgrass irrigation water test results Bicarbonate does not seal off the soil My presentation handout from the 2014 conference on Soil and water management: 3 problems, 3 solutions A… Continue reading My presentation on irrigation water quality

Field day poster: 5 grass varieties, 3 levels of salinity, and a month to grow-in — or not

This poster for today's field day describes what happened when we planted five grass varieties as stolons and then supplied irrigation with different amounts of salt in the water. I think two things might surprise you. First, some of the grass varieties, including a particular manilagrass (Zoysia matrella), can reach full coverage in about one… Continue reading Field day poster: 5 grass varieties, 3 levels of salinity, and a month to grow-in — or not

After 28 days, grow-in and salinity differences

I’ve been growing grasses in a plastic house with a lot of help from colleagues at the Thailand Institute of Scientific and Technological Research (TISTR). The idea was to see how these grasses grow in after being planted as stolons, and to see what happens when salt is added in the irrigation water. I’ll be… Continue reading After 28 days, grow-in and salinity differences

Grow-in potential

These pictures were taken 28 days apart. Here’s what the grasses looked like yesterday, on February 24. That was 4 weeks, exactly 28 days after planting. On 27 January, five different grass varieties were planted from stolons. The grasses, shown from left to right, are: manilagrass (nuwan noi) tropical carpetgrass (yaa malay) seashore paspalum (salam)… Continue reading Grow-in potential

Read these articles, but disregard the subtitles

When I saw there was a new article at Golfdom about sodium causing agronomic challenges on sand putting greens, I clicked the link to see what this was about. Sodium causes agronomic challenges for sand putting greens See why & get recommendations. https://t.co/agWp0OHbXH pic.twitter.com/wRvd9HibIb — Golfdom (@Golfdom) November 25, 2015 That link took me to… Continue reading Read these articles, but disregard the subtitles

High soluble salts, K, and extractants

Earlier this year Brad Shaver and I had a discussion about salinity and extractants. @asianturfgrass Yeah, I agree with you about not using for fertility recs. But still confused about high soluble salts, K, and extractants. — Brad Shaver (@MyTurfResearch) April 15, 2015 I had written previously this post explaining that a saturated paste extract… Continue reading High soluble salts, K, and extractants