Playing Method Location Quality
of test
Clegg Hammer Performance Quality Standards High
Standard Limits Period Limits Period for play
Basic Limits Period
Hardness BS7044 Anywhere 65- When 55- When 35- When Gravities between
Pitches become hard when the porosity
is reduced. Generally, this is caused when the sand particles compact down tightly upon one another. Some sands are more prone to compaction than others, usually after high usage, which is why it is important to ensure compatibility when topdressing or renovating. Regular aeration works and controlling the moisture content of a sand profile are essential when managing sand based pitches.
120 prepared 140 prepared 200 prepared for play
for play
The condition of a sward will also impact on Clegg hammer results. A good sward with a good root system will bind the sand profile together and be firmer. Clegg hammer results will fluctuate at
different times of the year, due to the condition of the turf, grass growth, rain, wind, changing temperatures, usage and maintenance of the pitch.
The two following graphs show the
results taken at home and away games. Not surprisingly the home results tend to
be more consistent than the away results. With the Clegg results at the stadium being pretty consistent (85-105) Ed has not had to do any major work to raise or lower them.
Every surface will have its own natural
hardness reading. This will be determined by general usage, routine maintenance, watering and weather conditions. If the surface is playing well and retaining stability then Ed does not see the point in over working the pitch. If the pitch was too soft he would do some extra rolling; if too hard solid tining would be in order. At other times these operations could cause more problems of destabilisation to the rootzone, capping of the surface and loss of grass.
At the end of the season Ed will review all the results obtained, which will help him in determining the close season work to be undertaken.
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www.dennisuk.com 67
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