TABLE 1.

Summary of the ANOVA table for the regression model with invasive-species-treatment factor as predictor.

Response	Chi-square	P-value	R 2
pH	1.05	0.412	0.22
CaCO3	0.52	0.719	0.12
Humus	4.02	0.021	0.52
ALP2O5	1.22	0.343	0.25
ALK2O	1.51	0.25	0.29
N	14.42	0	0.79
C	6.32	0.003	0.63
CN	7.63	0.001	0.67
S	1.76	0.189	0.32
Al	0.21	0.932	0.05
Ca	0.21	0.929	0.05
Fe	0.57	0.69	0.13
K	0.2	0.937	0.05
Mg	0.93	0.471	0.2
NB	5.68	0.005	0.6
DB	1.26	0.33	0.25
Plant diversity	8.24	0.083	0.34

Degrees of freedom for treatment and residuals were 4 and 19, respectively. For regression model estimates and 95% CI, see Supplementary Table 3.