Table 4. Results of principal component analyses (PCA).

	PC-1	PC-2	PC-3	PC-4
Eigenvalues	8.23	1.67	0.98	0.89
% Variance	63.34	12.87	7.56	6.82
Cumulative variance	63.3	76.2	83.8	90.6
Eigen vectors or factor loading
pH	0.423	0.351	–0.378	0.711
EC	0.925	0.113	–0.153	0.147
BD	–0.881	–0.034	0.212	0.002
WSA	0.590	–0.020	0.669	0.343
GMD	0.927	0.024	0.276	–0.024
MWD	0.904	0.001	0.342	0.046
PR	–0.770	0.268	–0.131	0.092
SOC	0.975	0.073	–0.109	–0.025
N	0.972	0.050	–0.103	–0.053
C-Stock	0.831	0.412	–0.107	–0.268
N-Stock	0.722	0.440	–0.067	–0.385
AWC	0.555	–0.782	–0.189	0.057
Water content	0.624	–0.693	–0.199	–0.066

Abbreviations are same as Table 1; PC: principal component; bold values under each component are highly weighted and underlined bold values are selected in minimum data set.