Sand topdressing by exact depth: how to work it out

Today I explained the same calculation about sand topdressing for the third time, so I need to write a blog post on this topic. This is following the method of David Robinson, who says when you’ve written the same code 3 times, write a function; when you’ve given the same advice 3 times, write a blog post; and when you’ve done the blog post 3 times, write a book.

Updated spreadsheets for sand topdressing by GP

The PACE Turf topdressing rate spreadsheets have been updated with a new default starting value for monthly maximum topdressing sand. US units spreadsheet Metric units spreadsheet

Putting green organic matter by depth in the soil

I watched the Greenkeeper App meeting about organic matter, and I recommend you do too. The video has Doug Soldat, Bill Kreuser, and Roch Gaussoin talking about soil organic matter, rootzones, sand topdressing, and turf performance.

Sand topdressing by growth rate and clipping volume

Does this sound about right? Matching sand topdressing to the growth of the grass works out pretty good when applying 1 cm3 of sand for every 1 cm3 of clipping volume.

Three reasons why sand topdressing is best expressed as a depth

Here are three reasons I think it is best to express sand topdressing applied to turfgrass as a depth. Depth of sand standardizes the amount applied, independent of the mass of the sand or the area over which the sand was spread.

Total organic matter testing on putting greens: sample number and sample volume

Cale Bigelow asked me an important question last month. I’d suggested that measuring the total organic matter over time is a way “to simultaneously produce a putting surface with the desired characteristics while minimizing the amount of disruptive work done to the putting surface.

This one simple trick can transform putting greens from usually good to consistently great

What’s the trick? It is measuring the soil organic matter in the green, over time, and then adjusting the maintenance work. The purpose of this is to simultaneously produce a putting surface with the desired characteristics while minimizing the amount of disruptive work done to the putting surface.

Verdure removal (or not) in turfgrass soil profile organic matter tests

After grass is mown, the remaining aboveground plant material is called verdure. The Turfgrass Information File describes verdure as the “layer of green living plant tissue remaining above the soil following mowing.

Temperature for loss on ignition in turfgrass soils

I’ve been thinking about measuring organic matter and about the quantity of sand required as topdressing for any turfgrass surface. For samples taken near the turfgrass surface, I would like to measure the mass loss on ignition, and call that the total organic matter.

Measuring organic matter

In a previous post, I mentioned that I’ve been thinking a lot about sand. I expect that sand is required for managing playability of sporting surfaces. I’ll writing in terms of golf course putting greens in this series of posts, but the principle applies to any turfgrass sports surface.