Everyone knows a golf green is smoothest right after the morning work, with some decrease in smoothness as the day goes on. How much does the smoothness and trueness of the roll decrease? I measured it.

The blog post discussed here is: https://www.asianturfgrass.com/post/one-chatter-or-snaking-event-in-every-third-ball-roll/

Linde et.al's article on "Comparing three methods to measure putting green trueness:" https://doi.org/10.2134/itsrj2016.05.0332

ATC Doublecut episode about the GS3 ball from the USGA: https://youtu.be/27ZkAUbs_sA?si=FjpJ3MScvKQVxv85

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More about ATC soil tests at https://www.asianturfgrass.com/project/soil-tests/