Photo of the week: Poa annua and soil pH

We've all heard that Poa annua doesn't grow well at low pH. There's a research green at Rutgers University that shows this clearly. This photo was taken in July 2024. These are the most recent soil pH values for this Poa annua research green. All other treatments to these plots are the same. Same mowing, same nitrogen rate, same rolling, same irrigation, etc.

The plots with a soil pH above 7 look as if they had been treated with a…