Coring

An especially lucid abstract about core aeration

Please forgive me for mentioning hollow-tine cultivation (or core aeration, or coring) yet again, and how it might be overdone. There’s an article I want to share with you, about what happened after coring of sand-based putting greens.

Organic matter reduction by hollow-tines, solid-tines, and sand topdressing

This is an elaboration on, and an extension of, the calculations showing that hollow-tine cultivation, with removal of the cores, doesn’t reduce soil organic matter (OM) at all. That’s not an intuitive result, because OM has obviously been removed from the rootzone.

Mental models, soil organic matter, and chocolate bars

I used to think of hollow-tine cultivation, with cores removed, as one of the best ways to remove organic matter from the rootzone. Maybe even as an essential way to manage organic matter.

You won't believe this common maintenance practice doesn't reduce organic matter at all

Hollow-tine aerification, coring, core aeration, whatever you call it, removes organic matter from the soil. But if you measure the soil organic matter before pulling any cores, and then measure again after the cores are removed, the soil organic matter % will be exactly the same.

5 examples of Goodhart's law in turfgrass management

When a measure becomes a target, it ceases to be a good measure. That’s a generalization of Goodhart’s law. I’m an advocate of measuring some surface performance, plant, and soil parameters.

Hollow-tine cultivation and solid-tine spiking both failed to alleviate summer bentgrass decline

A late July solid-tine spiking treatment of a creeping bentgrass green in Hokkaido, Japan. How’s this for a lede? “Hollow-tine coring and solid-tine spiking practices may not alleviate creeping bentgrass summer decline.

Core aerating putting greens, or not

There was an article on the Golf Course Industry website about a course that hasn’t core aerified putting greens since the course opened 12 years ago. It’s a short article—466 words.

Cleaning cores the easy way

On a recent trip to Japan, I’d wanted to get a new video of a core sweeper in operation. Unfortunately for me, but fortunately for the greenkeeper, who had a laugh about this, the sweepers clean the greens so fast that by the time I arrived there were no more cores to sweep.

Fairway aerification with no clean-up required

The maintenance equipment used on Japan’s golf courses is usually similar to what is used in other parts of the world, but sometimes the equipment is quite different—the Yanmar helicopter comes to mind.