Picea abies				
Site	Root N concentration			
	[mg g-1]			
	 - N	 - N	 +N	 +N
		s.e.		s.e.
Ahe	11.5	0.5	15.9	1.2
Klo	13.6	1.6	18.1	0.3
Wal	15.3	0.9	26.1	3.7
AuP	15.4	0.5	34.4	1.6
