Thetford long-term forest monitoring plot - Foliar sampling and analysis

Foliar chemistry assessment undertaken every 1 to 2 years (Average over 1995 to 2005 period)
	Element	Average	Standard error	Sample size	Average	Standard error	Sample size
	Element	Current years growth			Previous years growth
Macronutrients (mg/g)	N	11.11	8.577	44	14.27	7.453	79
	S	191.9	422.3	29	92.42	313.3	64
	P	0.956	0.757	44	1.156	0.620	79
	Ca	2.786	2.458	44	4.460	2.737	79
	Mg	0.538	0.421	44	0.674	0.374	79
	K	3.372	2.714	44	4.323	2.372	79
Micronutrients (μg/g)	Na	168.7	127.6	16	472.5	347.8	52
	Zn	26.32	6.255	44	24.53	6.171	79
	Mn	350.4	123.4	44	476.0	221.3	79
	Fe	70.95	23.49	44	87.60	28.06	79
	Cu	2.941	0.588	44	2.819	0.526	79
	B	20.68	6.314	16	19.09	5.901	52
Trace metals (μg/g)	Al	114.7	27.52	44	121.8	34.28	79
	Ni	1.352	4.525	24	0.293	0.310	23
	Co	0.181	0.143	5	0.173	0.109	5
	Cd	0.189	0.106	20	0.131	0.109	20
	Cr	0.224	0.221	20	0.440	0.364	20
	Ti	4.381	0.624	15	8.349	0.757	15

ND: no data recorded

Thetford long-term forest monitoring plot – Foliar sampling and analysis