This implies some degree of subjectivity as to individual perceptions of what can be deemed “good quality” (Blanco and Lal, 2008). More recently, the discussion has been centered on the concept of „soil health‟, largely defined for soil biological properties (Doran and Jones, 1996). Both concepts are focused on assessing soil functions in the landscape, but there is no explicit reference state to be used in a soil quality or health framework. Soil quality indicators are normally chosen according to the research focus. The dataset of indicators may be constructed according to expert opinion (Sanchez-Navarro et al., 2015), based on how often the parameters appear in scientific papers or it may be guided solely on statistical criteria. Certainly, it can also consist of the combination of both strategies (Lima et al., 2013). However, comparing soil quality indicators is not an easy task, since there is neither a consensus as to the appropriate indicators to compose the SQI, nor as to the way that they should be selected to minimize personal subjectivity. | Effects of long term rice-based cropping systems on soil quality indicators in central plain of Chhattisgarh
