. 2011 Jan 27;62(6):1857–1869. doi: 10.1093/jxb/erq370

Table 4.

Results of the multiple linear regression in the form y=aWR+bW+c with WR, W, and c being wood resistivity (Ωm), soil water content (%), and intercept, respectively

Site/species	Model significance	R²	Normalized correlation coefficient		Semi-partial correlation
Site/species	Model significance	R²	Wood resistivity	Soil water content	Wood resistivity	Soil water content
Brislach/mature beech	P <0.001	0.97	0.93	0.23	0.92	0.23
Brislach/mature spruce	P <0.001	0.81	0.81	0.24	0.78	0.23
Allschwil/young beech	P <0.001	0.94	0.92	0.25	0.92	0.25
Allschwil/young spruce	P <0.001	0.53	0.55	0.30	0.50	0.28

All parameter estimates were significant at P <0.001. Calculated absorptive root surface area (ARSA) values were normalized by the starting value.