Table 7. Stepwise Regression Model for Predicting Cd Concentration (Y) in Edible Part of Pak choi based on Soil Properties.

Stepwise regression model	R2	F value	T value and R2 of partial regression coefficient
				T value	R2
Y = −39.256–15.516 pH−0.944 ZnT−0.379 OM +26.752 CdT	0.977	138.808*	pH	−18.682**	0.964
			ZnT	−3.788**	0.524
			OM	−3.652*	0.376
			CdT	2.67*	0.354

^aCd_T and Zn_T refer to the total Cadmium and Zinc concentrations.

^bSuperscripts * and ** indicate significant levels of probability at 0.05 and 0.01, respectively.