I explain that moving from full sun to tree shade reduced photosynthetically active radiation by about 80%. I show an app, and a PACE Turf document, that will allow you to find both PPFD and DLI no matter where you are located.

I discussed these links:
- https://www.asianturfgrass.com/post/shade-and-sun/
- https://asianturfgrass.shinyapps.io/ppfd_by_time/
- https://www.paceturf.org/memberedition/weather
- https://www.paceturf.org/gallery/detail/photosynthetically-active-radiation
- https://www.asianturfgrass.com/post/rule-of-thumb-for-cloud-effect-on-par/

Read more about all kinds of turfgrass topics at https://www.asianturfgrass.com/
Find a suite of decision-making tools at https://www.paceturf.org/
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• Turf Without Borders show page: https://turfwb.asianturfgrass.com/
• International Turfgrass Society: https://turfsociety.com/