Sustainability Keystone Indicator

An indicator which can help to define a system or product, such as a sports pitch. Whilst usually seen as positive indicators, the use of a negative indicator can also help to provide valuable information on the state of a system.

The ability of a turfgrass surface to sustain a certain amount of usage, without causing an unacceptable deterioration in the playing surface is influenced by a wide range of variables, particularly soil type, soil condition and sward condition. This latter feature is itself composed of many variables; each often being identified as a performance standard.