Table 2 Means and standard errors (SE) of cumulative CH₄ emissions (kg CH₄-C ha⁻¹) of a grass-clover – silage maize – green manure sequence.

Farming System	Grass-clover (24 Aug 2012 to 7 May 2013, 256 days)		Silage Maize (7 May 2013 to 24 Sep 2013, 140 days)		Green Manure (24 Sep 2013 to 18 Mar 2014, 175 days)		Overall (24 Aug 2012 to 18 Mar 2014, 571 days)		Annual data (18 Mar 2013 to 18 Mar 2014)
Farming System	Mean	SE	Mean	SE	Mean	SE	Mean	SE	Mean	SE
BIODYN	−0.27	0.02b	−0.17	0.04b	0.00	0.03a	−0.48	0.04b	−0.26	0.05b
BIOORG	−0.13	0.06ab	0.02	0.07ab	0.03	0.06a	−0.09	0.15ab	0.00	0.12ab
CONFYM	0.05	0.14a	3.31	1.26a	−0.03	0.04a	3.29	1.21a	3.21	1.31a
CONMIN	−0.29	0.14ab	−0.13	0.03b	−0.06	0.06a	−0.49	0.20ab	−0.26	0.11b
NOFERT	—^a		0.19	0.14ab	0.15	0.04a	—^a		0.33	0.15ab
Kruskal Wallis test	χ ²	p-value	χ ²	p-value	χ ²	p-value	χ ²	p-value	χ ²	p-value
Farming System	7.70^a	0.053	14.56	0.006	8.31	0.081	10.48^a	0.015	14.64	0.006
org vs. non-org	1.86	0.172	2.16	0.141	0.89	0.345	2.48	0.115	1.59	0.208

^aMeasurements in NOFERT started at 14 March 2013 and thus were excluded from statistical analysis.
Kruskal Wallis non-parametric test on CH₄ emissions per farming system (n = 4) and pairwise comparisons of org (BIODYN + BIOORG) and non-org (CONFYM + CONMIN) systems (n = 8). Letters = Post-hoc Kruskal Nemeny test (p < 0.05).

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