Table 4.
The values of correlation coefficient (r)1) between physicochemical properties of artificial soil and growth characteristics of Lespedeza cyrtobotrya

	Bulk density	Porosity	Water holding capacity	pH	Electrical conductivity	C/N ratio	Organic matter	Bacterial density	Stem height	Root length
Bulk density	1	-0.965**	-0.933**	0.174	-0.149	-0.824**	-0.764**	-0.770**	-0.239	0.336**
Porosity		1	0.887**	-0.133	0.192	0.780**	0.700**	0.724**	0.242	-0.318*
Water holding capacity			1	-0.204	0.103	0.830**	0.762**	0.807**	0.338**	-0.281*
pH				1	-0.575**	-0.328*	-0.380**	-0.289*	-0.122	-0.065
Electrical conductivity					1	0.294*	0.342**	0.174	-0.135	-0.233
C/N ratio						1	0.948**	0.952**	0.389**	-0.357**
Organic matter							1	0.922**	0.361**	-0.383**
Bacterial density								1	0.599**	-0.138
Stem height									1	0.547**
Root length										1

Correlation coefficient (r) was determined by Pearson correlation analysis to evaluate the relationship between parameters. Results were evaluated with 95% and 99% confidence intervals: *, significant at p < 0.05 and **, significant at p < 0.01 level