|Table 4: Principal component analysis results using 25 potential soil quality indicators to evaluate eight LUSMS in the Mai-Negus catchment, northern Ethiopia.|
|Boldface eigenvector values correspond to the PCs highly weighted variables examined for the index.|
Bold-italic factors correspond to the indicators retained in the SQ index. The weight of the variables included in the index was decided using the variance of each factor.
PCA-SQI = 0.303OC + 0.0303TN + 0.215CEC + 0.215TP + 0.200silt + 0.200DBD + 0.159Fe.
Normalized PCA-SQI = = 0.190OC + 0.190TN + 0.135CEC + 0.135TP + 0.125silt + 0.125DBD + 0.100Fe.