The median particle size of sand used for putting green rootzones and topdressing

The D50 is a value that represents the median particle diameter in a sand. I calculated the D50 for 302 sands from around the world, and 15% of them are finer than the limit defined by the USGA Recommendations for a Method of Putting Green Construction.

Read about this at https://www.asianturfgrass.com/post/d50-median-sand-diameter/

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