I discuss this blog post: https://www.asianturfgrass.com/post/adding-potassium-does-not-increase-soil-ability-to-store-it/

ATC newsletter subscriptions: https://www.asianturfgrass.com/#newsletters

MLSN hub: https://www.asianturfgrass.com/mlsn/

More about Jackie Guevara's  soil test and fertilizer research at Michigan State University:
https://www.asianturfgrass.com/post/mlsn-and-turfgrass-nutrient-recommendations/

https://www.asianturfgrass.com/post/soil-test-showdown/