Table 5. Mantel tests of person’s correlations and Random Forest analyses reveal significant associations between 16S rRNA-based community composition and soil biological and chemical properties.

Variables	r Mantel Person	p Mantel Person	R.F. % var explained
UA	0.50	0.001	57.15
DHA	0.58	0.001	67.46
BGA	0.47	0.001	58.71
pH	0.06	0.205	-0.58
TC	0.042	0.241	-10.64
TN	0.19	0.016	15.21
TP	0.55	0.001	68.7
TK	0.47	0.001	51.47
SWC	0.05	0.221	-6.02
SRI Bacterial	0.43	0.001	46.81
SRI Fungal	0.65	0.001	74.49
SIR FB Ratio	0.52	0.001	55.86
N50 SIR	0.08	0.143	9.98
N100 SIR	0.12	0.074	13.07
N0 SIR	0.39	0.001	46.13

Mantel correlations are based on Person correlation coefficients. These were also determined based on Spearman correlation, which yielded comparable results. P values < 0.05 and variables with higher than 30% variance explained by the OTU table are in bold text.