Table 4. 2-factor ANOVA (analysis of variance) results determining whether nitrogen, carbon or both nutrients are limiting dentrification rates.

Site/Season	Source	d.f.	MS	F	p	Significant Tukey post-hoc test
						Nitrogen	Carbon
Sandy site in winter	Nitrogen	1	189	193	< 0.001
	Carbon	1	8.05	8.23	0.009
	Nitrogen*Carbon	1	6.74	6.89	0.016	+C & –C: +N>–N	–N: –C>+C
	Error	20	0.980
Sandy site in summer	Nitrogen	1	92000	97.8	< 0.001	+N>–N
	Carbon	1	548	0.582	0.454
	Nitrogen*Carbon	1	548	0.582	0.454
	Error	20	942
Muddy-sand site in winter	Nitrogen	1	256	447	< 0.001	+N>–N
	Carbon	1	5.61	9.77	0.005		–C>+C
	Nitrogen*Carbon	1	0.226	0.394	0.537
	Error	20	0.574
Muddy-sand site in summer	Nitrogen	1	8640	291	< 0.001	+N>–N
	Carbon	1	56.5	1.90	0.183
	Nitrogen*Carbon	1	56.5	1.90	0.183
	Error	20	29.7

Factors are nitrogen (N) and carbon (C). Values in bold are significant at p<0.05. Tukey post-hoc tests for significant differences between presence/absence (+/–) of nitrogen and carbon are shown at α = 0.05.