Aggregate Indices Method in Soil Quality Evaluation Using the Relative Soil Quality Index

Table 5

Hierarchy for assessing SQ of RSQI = with parameters (Cd, Cu, Pb, SOM, N_t, P_t, K_t, N_av, P_av, and K_av).

RSQI	SQ	Colour
96–100	Good/excellent (); (no degradation)	Green
91–95	Moderate; (start degradation)	Yellow
51–90	Poor; (degradation)	Orange
11–50	Very poor; (strong degradation)	Red
0–10	Hazardous; (very strong degradation)	Brown