Table 4.

Correlation matrix of soil physico-chemical parameters and soil respiration rate (SRR).

SRR	SRR	WFPS	ST	RH	AirT	BD	Porosity	pH	Phosphorus	%N	OM	Sand	Clay	Silt
	1	0.26	0.16	−0.16	0.21	−0.29	0.29	0.4	−0.29	−0.23	0.43	−0.34	0.18	0.36
WFPS	0.26	1	0.48	−0.43	0.61	0.18	−0.18	0.37	−0.38	−0.41	−0.26	−0.34	0.43	0.17
ST	0.16	0.48	1	−0.98	−0.97	0.27	−0.25	−0.21	−0.2	−0.49	−0.14	−0.58	0.71	0.32
RH	−0.16	−0.43	−0.98	1	0.94	−0.26	0.25	−0.23	0.22	−0.5	−0.36	0.6	−0.72	−0.34
AirT	0.21	0.61	−0.97	0.94	1	0.27	0.25	0.16	−0.28	−0.51	−0.36	0.6	−0.71	0.34
BD	−0.29	0.18	0.27	−0.26	0.27	1	−1	−0.17	0.03	0.51	−0.57	−0.17	0.13	0.15
Porosity	0.29	−0.18	−0.25	0.25	0.25	−1	1	−0.03	−0.03	−0.18	0.57	0.21	−0.13	−0.15
pH	0.4	0.37	−0.21	−0.23	0.16	−0.17	−0.03	1	−0.07	−0.18	−0.13	0.11	0.27	0.11
Phosphorus	−0.29	−0.38	−0.2	0.22	−0.28	0.03	−0.03	−0.07	1	−0.13	−0.26	0.36	−0.28	−0.31
%N	−0.23	−0.41	−0.49	−0.5	−0.51	0.51	−0.18	−0.18	−0.13	1	−0.13	−0.48	−0.39	0.03
OM	0.43	−0.26	−0.14	−0.36	−0.36	−0.57	0.57	−0.13	−0.26	−0.13	1	0.18	0.39	0.03
Sand	−0.34	−0.34	−0.58	0.6	0.6	−0.17	0.21	0.11	0.36	−0.48	0.18	1	−0.78	−0.89
Clay	0.18	0.43	0.71	−0.72	−0.71	0.13	−0.13	0.27	−0.28	−0.39	0.39	−0.78	1	0.59
Silt	0.36	0.17	0.32	−0.34	0.34	0.15	−0.15	0.11	−0.31	0.03	0.03	−0.89	0.59	1

Soil respiration rate (SRR), Water-filled pore space (WFPS), Soil temperature (ST), Relative humidity (RH), Air temperature (AirT), Bulk density (BD), percentage total nitrogen (%N), Organic matter (OM).