Bowls green surface firmness is something we know about instinctively as greenkeepers, but do we fully understand its impact on the development of a Performance Bowling Green?
Last time we discussed smoothness and trueness and the effect these have on bowls green performance, but it was clear from this that we were still dealing primarily with symptoms and not causes.
To get closer to a clear understanding of what makes a good or bad green surface, we have to move on to the second level of our hypothesis. You might recall that the hypothesis offered was as follows:
- Bowling Green Surface Trueness and Smoothness are correlated with green surface firmness (firmer greens are smoother and truer).
- Bowling Green surface firmness is correlated with soil moisture content (wetter greens are less firm).
- Soil Moisture Content is correlated with Soil Organic Matter Content
- Therefore the Performance of Bowling Green Surfaces is correlated with Soil Organic Matter Content.
Measuring Bowls Green Surface Firmness
For smoothness and trueness measurement, we saw last time that the turf industry has had to get inventive, with the development of equipment like the STRI trueness meter and the Parry Meter.
In contrast, the measurement of bowls green surface firmness can rely on some tried and tested technology in the shape of the Clegg Hammer, a tool that is widely used for surface hardness measurement in a variety of engineering contexts such as road building.
Using the Clegg Hammer to Measure Bowls Green Surface Firmness
The Clegg Hammer is in effect just an open tube which is placed with one end resting on the surface and a weight that is please log in or register for a free membership to continue reading