Table 2.

Analysis of covariance testing the effects of cumulative Sphagnum height increment, N and P additions, site and Sphagnum species on capitulum and stem nutrient concentrations in 2001

Source	df	Capitulum		Stem
		F	Sig.	F	Sig.
N concentration 2001
Height increment 1998–2001	1	0.3	NS	0.6	NS
N	1	32.4	***	45.7	***
P	1	0.0	NS	1.1	NS
Site	1	<0.1	NS	0.3	NS
N × P	1	0.2	NS	0.3	NS
N × Site	1	3.8	*	2.9	NS
P × Site	1	0.3	NS	0.5	NS
N × P × Site	1	0.0	NS	0.1	NS
R 2		0.50		0.63
P concentration 2001
Height increment 1998–2001	1	0.4	NS	0.1	NS
N	1	0.2	NS	0.1	NS
P	1	53.8	***	35.7	***
Site	1	12.5	**	7.2	***
N × P	1	<0.1	NS	0.1	NS
N × Site	1	1.0	NS	0.8	NS
P × Site	1	<0.1	NS	2.7	NS
N × P × Site	1	2.0	NS	0.3	NS
R 2		0.73		0.70

* 0.05 > P > 0.01, ** 0.01 > P > 0.001, *** P < 0.001, NS P > 0.05