There is a large variety of soil quality indicators but there is no general agreement on a method to select parameters for assessing soil quality (Rossi et al. 2009; Hailu
and Chambers 2012).
Soil parameters need to be defined in a particular context to be used as quality indicators (Failing and Gregory 2003), and a combination
of biological and chemical parameters is needed to provide indicators of soil functions (for example, nutrient
cycling, filtering and buffering, biodiversity and habitats)
(Andrews et al. 2004).