Fordata normalization, each indicatorwas divided by its standard
deviation so that at the end, all the indicators received a standard
deviation equal to 1. For the determination of proportional
coefficient, we used the linear scoring method; here, indicators
are ranked in ascending ordescending orderdepending onwhether a
higher valuewas considered“good”or “bad” in terms of soil function.
For “more is better” indicators, each observation was divided by the
highest observed value such that it received a score of 1 and the
remainder less than 1. For “less is better” indicators, the lowest
observed (in the numerator) was divided by each observation
(in denominator) such that it received a score of 1 and the remainder
less than 1. The indicator scores vary between 0 and 1. A score of 1
was given when an indicator value represented high function.
Combination of transformed indicators by their proportional
coefficients gave a product (WiXi) and the soil quality index (SQI)
parameter was computed by summing scores for each variable
according to the method described by Andrews et al. (2002a,b).
Fordata normalization, each indicatorwas divided by its standarddeviation so that at the end, all the indicators received a standarddeviation equal to 1. For the determination of proportionalcoefficient, we used the linear scoring method; here, indicatorsare ranked in ascending ordescending orderdepending onwhether ahigher valuewas considered“good”or “bad” in terms of soil function.For “more is better” indicators, each observation was divided by thehighest observed value such that it received a score of 1 and theremainder less than 1. For “less is better” indicators, the lowestobserved (in the numerator) was divided by each observation(in denominator) such that it received a score of 1 and the remainderless than 1. The indicator scores vary between 0 and 1. A score of 1was given when an indicator value represented high function.Combination of transformed indicators by their proportionalcoefficients gave a product (WiXi) and the soil quality index (SQI)parameter was computed by summing scores for each variableaccording to the method described by Andrews et al. (2002a,b).
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