The ATC Doublecut with Micah Woods

Clouds reduce photosynthetically active radiation by about 25% when you can still see your shadow. When you can't see your shadow, that's about 50% of PAR blocked. And when you can't see your shadow and can't find what part of the sky the sun is in, that's about 75% PAR reduction.

Read about this on a cloudy day in Tokyo, and see two apps that allow you to either check the full sun instantaneous PAR, the full sun daily PAR, or the past year of PAR, for pretty much anywhere in the world:

Read more about all kinds of turfgrass topics at
Find turfgrass information and decision-making tools at
See the PACE Turf YouTube channel at
See the ATC newsletters at
Listen to the ATC Doublecut with Micah Woods podcast at
Listen to the ATC Office Hours podcast at

Creators & Guests

Micah Woods
I'm chief scientist at the Asian Turfgrass Center and director of the @paceturf information service. Some current projects include #OM246, #ClipVol, and #MLSN.

What is The ATC Doublecut with Micah Woods?

I discuss ATC blog posts, with supplementary information, stories, and the reasons why I thought the topic was worth writing about, and worth reading about. Thus, a doublecut of these topics. This covers grass selection, playability, and all the work done to create a certain type of turfgrass surface.