Table 3.

Individual and combined effects of eT, eCO₂, and drought in soil parameters, organic and inorganic pools and process rates.

	Treatment effects
	eT vs. eCO2 dataset						Drought dataset
	[eT]		[eCO2]		[eT] × [eCO2]		[eTeCO2]		[D]		[eT × eCO2] × [D]
	F	p	F	p	F	p	F	p	F	p	F	p
Soil parameters
SWC	3.140	0.09	0.72	0.40	1.180	0.29	1.740	0.21	1164.59	2.24 × 10−16	0.621	0.42
pH	0.557	0.47	0.01	0.93	1.280	0.27	0.890	0.36	0.28	0.60	0.320	0.57
Soil N	0.128	0.73	1.39	0.26	3.140	0.09	0.262	0.62	1.08	0.31	0.422	0.52
MBN	5.620	0.03	0.99	0.33	0.769	0.40	6.110	0.02	11.30	3.00 × 10−3	0.240	0.63
Extractable organic and inorganic pools
NO3−	1.570	0.23	0.40	0.53	0.010	0.89	0.990	0.33	1.03	0.32	1.720	0.20
NH4+	0.510	0.48	0.05	0.82	0.080	0.77	0.030	0.86	93.35	4.23 × 10−8	0.670	0.42
DIN	1.230	0.28	0.31	0.58	0.005	0.94	0.700	0.41	15.24	1.00 × 10−3	0.100	0.75
DON	3.120	0.09	0.54	0.47	2.260	0.15	0.007	0.93	10.96	4.00 × 10−3	1.070	0.31
TDN	0.140	0.71	1.40	0.25	1.250	0.28	0.770	0.39	26.35	1.00 × 10−4	0.037	0.84
DOC	5.330	0.02	0.01	0.89	NA	NA	1.680	0.21	24.44	1.00 × 10−4	0.000	0.99
Gross process rates
NH4+ mineralization	0.560	0.46	0.84	0.37	1.550	0.23	8.180	0.01	22.81	2.00 × 10−4	5.830	0.03
NH4+ immobilization	0.020	0.88	1.19	0.29	3.110	0.10	2.210	0.16	5.60	0.03	0.068	0.79
Nitrification	0.030	0.85	0.95	0.34	0.430	0.51	1.320	0.26	15.26	1.40 × 10−3	0.002	0.96

Statistical effects were assessed by a 2-way ANOVA type II or a 2-way ANOVA type III whenever a significant interaction term was found. Least square means (lsmeans) multiple comparison tests were ran on interactive effects. Significant effects from the ANOVA are shown in bold. NA depict variables for which nonparametric tests were used and therefore an interactive effect could not be calculated.

SWC soil water content, MBN microbial biomass nitrogen, DIN dissolved inorganic nitrogen, DON dissolved organic nitrogen, TDN total dissolved nitrogen, DOC dissolved organic nitrogen.