Table 2.

Significance level of main effects and interactions of tree species (TS), soil amendment (SA), and measurement date (D) for response variables measured during the second year after tree transplant and soil treatment.

	Main effects			Interactions
	TS	SA	D	TS × SA	TS × D	SA × D	TS × SA × D
		P < F^z			P < F^z
Root dry mass	***	NS	NS	NS	NS	NS	NS
Total root length	***	NS	**	*	NS	NS	NS
Fine root length	***	NS	***	*	NS	NS	NS
Soil carbon content	NS	***	NS	NS	**	NS	NS
Soil nitrogen content	NS	***	***	NS	**	**	NS
Soil C/N ratio	NS	***	***	NS	**	***	***
Soil CO₂ efflux rate	NS	**	***	NS	***	**	NS
Soil moisture (v/v)	***	**	***	NS	***	NS	NS

^zAnalysis of variance using PROC MIXED; NS denotes not significant at α = 0.075; Asterisks (*), (**), and (***) denote significance at α = 0.075, α = 0.05, and α = 0.01, respectively.