Table 2.

Mean element content (mg g⁻¹) and nutrient ratios of fresh beech foliage in 1984 and 2012. The min-max range includes extreme cases, which are not shown in Fig. 4.

	N		S		P		Ca		Mg		K		Ca/Mg
	1984	2012	1984	2012	1984	2012	1984	2012	1984	2012	1984	2012	1984	2012
min	14.76	17.43	1.15	0.78	0.68	0.47	3.68	2.76	0.58	0.23	6.24	2.56	3.20	2.90
max	26.80	29.71	1.84	2.32	1.54	1.39	30.21	24.48	5.52	3.79	19.45	11.58	16.50	16.00
Mean	22.41	24.09	1.49	1.61	1.15	0.80	12.14	9.20	2.01	1.49	12.31	6.44	6.38	6.71
paired t-test	***		***		***		***		***		***		ns
	N/S		N/P		N/Ca		N/Mg		N/K		K/Ca		K/Mg
	1984	2012	1984	2012	1984	2012	1984	2012	1984	2012	1984	2012	1984	2012
min	8.90	10.20	11.00	18.10	0.60	1.00	3.50	6.00	1.00	2.00	0.40	0.20	1.20	0.80
max	20.20	32.50	34.20	45.50	6.10	7.80	40.00	93.80	3.80	10.10	3.80	2.70	26.50	32.40
Mean	15.19	15.22	19.98	31.09	2.02	2.86	12.45	18.35	1.92	4.02	1.10	0.77	6.96	5.10
paired t-test	ns		***		***		***		***		***		***

Paired sample t-tests were performed to test significance of differences between the years 1984 and 2012: ns: not signifiant; *p ≤ 0.05; **p ≤ 0.01;

^***p ≤ 0.001.