Table 4 Canonical discriminant function coefficients for classified groups and structure matrix.

Variable	Standardized canonical discriminant functions		Non-standardized canonical discriminant functions		Structure matrix
Variable	Funct.1	Funct.2	Funct.1	Funct.2	Funct.1	Funct.2
pH	0.415	− 0.272	1.598	8.737	0.238	0.013
EC	0.107	− 0.011	0.469	− 1.047	0.063	− 0.028
TC	− 2.017	− 0.783	− 9.683	− 0.051	− 0.060	− 0.028
TIC	2.112	0.745	21.976	− 3.760	0.267	0.111
SOC	− 0.313	0.674	− 2.561	7.759	− 0.213	− 0.070
DOC	0.784	− 2.435	0.108	5.505	− 0.122	− 0.213
DTPA-Cu	0.399	− 0.183	0.631	− 0.338	0.156	0.010
DTPA-Zn	− 0.311	− 0.074	− 0.457	− 0.290	− 0.153	− 0.032
DTPA-Mn	− 0.464	0.660	− 0.068	− 0.109	− 0.159	0.110
DTPA-Fe	− 0.082	0.515	− 0.010	0.097	− 0.166	0.147
MBC	− 0.032	0.308	− 7.809	0.067	− 0.103	− 0.060
DHA	− 0.399	1.159	− 0.053	0.007	− 0.082	0.2538
Constant			− 8.743	8.737

EC, electrical conductivity; TC, total carbon; TIC, total inorganic carbon; SOC, soil organic carbon; DOC, dissolved organic carbon; MBC, microbial biomass carbon; DHA, dehydrogenase activity.

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