. 2019 Feb 8;9:1702. doi: 10.1038/s41598-018-38207-w

Table 4.

Pearson correlation coefficients between cumulative area-scaled N₂O emissions in silage maize, total N (Nt) and mineralised N (N_min) input to maize and soil parameters sampled in the DOK trial in 2012.

	Including NOFERT					Excluding NOFERT
	N₂O	Nt input	N_min input¹	pH	SOC	N₂O	Nt input	N_min input¹	pH	SOC
N_t input	0.18					0.55*
N_min input^a	0.37	0.80***				0.63**	0.72**
pH	−0.54*	0.38	0.25			−0.63**	−0.57*	−0.33
SOC	−0.46*	0.18	−0.04	0.67**		−0.37	−0.36	−0.44	0.54*
C_mic	−0.50*	0.35	0.02	0.77***	0.88***	−0.49	−0.30	−0.52*	0.57*	0.86***

Correlations were calculated across farming systems by including and excluding NOFERT.

^aN_min: nitrate and ammonium.

SOC – soil organic carbon, C_mic – microbial biomass C.

Significant levels for correlations: *p < 0.05, **p < 0.01, ***p < 0.001.