Here's a roundup of turfgrass articles and links from the past month:

An ET calculator for any location, now in a Japanese version.

From Andrew McDaniel, images of earthquake damage on Kumamoto golf courses:

Japan's Kumamoto Prefecture. Golf course images showing damage from the earthquake. pic.twitter.com/cT4UWIjlrD

— Andrew McDaniel (@drumcturf) May 22, 2016

From Bhupendra Singh, Tifdwarf roots, growth potential, and fertilizer.

Dave Wilber and Mike Young on the TurfNet Renovation Report.

Sharing slides. Why isn't this more common?

Megan Kennelly on spray nozzles and water quality.

Guide from the USGA Green Section on Turfgrass Fertilization.

How to save 82% on fertilizer cost.

Achim Dobermann with Park Grass videos.

These amazing plot differences in biodiversity are the result of 160 years of different fertilizer use in Parkgrass. pic.twitter.com/4hmEnhsdXX

— Achim Dobermann (@achimdobermann) May 22, 2016

Let's look at it a little closer. Hugely different plots, even though they all started out the same in 1856. pic.twitter.com/14h0LY5E8F

— Achim Dobermann (@achimdobermann) May 22, 2016

Avoiding nutrient deficiencies from GCM China.

More from the air: view from the helicopter at Keya GC.

Views from the heli today. へり から の 写真‼️ pic.twitter.com/Kefqc7C0Zc

— Andrew McDaniel (@drumcturf) May 18, 2016

Shade and sun.

From Scott McElroy, is there an upper limit to how firm and fast a surface should be.

An interesting technique for introducing Cynodon to Agrostis fairways.

Alan Windham with images of pythium blight on ultradwarf:

Pythium blight still active on ultradwarf bermudagrass in West TN after heavy rainfall. pic.twitter.com/xRO3XopnDG

— Alan Windham (@UTPlantDoc) May 5, 2016

A new Pace of Play Manual from the R&A.

Soil organic matter decreased with concurrent reductions in coring and topdressing; data to support the anecdote.

More data to support an anecdote; clipping amounts.

Water quality and pesticide performance.

For more about turfgrass management, browse articles available for download on the ATC Turfgrass Information page, subscribe to this blog by e-mail or with an RSS reader - I use Feedly, or follow asianturfgrass on Twitter. Link and article roundups from previous months are here.