A research article recommended two spring and one autumn hollow-tine aerification, supplemented by solid-tine aerification during summer, for creeping bentgrass putting greens in the transition zone. I discussed this, and include links to the article, in this post: https://www.asianturfgrass.com..../post/coring-three-t more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
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