Table 3.

Basic statistics for elements contents in shoots and roots of plant species (contents are given in mg kg ⁻¹ of dried matter)

Element	Rumex acetosa				Urtica dioica				Spinacia oleracea
	Shoot		Root		Shoot		Root		Shoot		Root
	Range	Med	Range	Med	Range	Med	Range	Med	Range	Med	Range	Med
Ag	0.01-0.47	0.15	0.005-0.11	0.037	0.011-0.35	0.091	0.029-0.17	0.058	0.01-0.16	0.08	0.01-1.17	0.04
Al	18.8-293	55.8	174-406	328	76.0-386	223	214-1396	494	93.3-259	172	163-466	308
As	<0.25-0.94	<0.25	<0.25-1.18	0.76	<0.25-0.90	<0.25	0.53-0.94	0.89	<0.25-0.76	0.44	<0.25-0.40	<0.25
Ba	1.38-11.0	3.49	8.36-14.2	10.7	1.80-23.4	13.2	3.47-21.9	10.6	2.21-11.4	4.40	5.37-19.1	9.90
Ca	2405-5251	3777	4073-13523	5526	17689-26850	21763	4188-8798	4773	3252-9099	4049	2283-3863	2819
Cd	0.03-0.07	0.039	0.05-0.09	0.053	0.01-0.03	0.01	0.02-0.11	0.08	0.06-0.26	0.13	0.09-0.34	0.17
Cr	0.13-0.60	0.22	0.41-0.74	0.66	0.22-0.78	0.40	0.73-2.29	1.01	0.27-0.88	0.49	0.38-1.63	0.83
Cu	6.54-11.4	8.07	6.33-23.6	12.9	10.6-32.4	15.3	7.1-24.0	10.0	6.41-9.66	7.74	3.80-7.48	6.45
Fe	56.0-218	79.2	211-424	238	80.1-240	154	204-892	459	102-253	133	142-368	272
K	18945-30910	21751	5640-10711	8493	10292-17683	14800	9208-12105	10181	30197-38421	30809	19233-25846	21854
Li	0.06-0.31	0.081	0.15-0.22	0.18	0.040-0.37	0.17	0.08-0.88	0.31	0.089-0.35	0.13	0.14-0.30	0.20
Mg	1166-1783	1521	1051-1594	1192	866-1453	1237	393-1000	809	1680	1396	1058-1387	1237
Mn	11.3-30.3	17.7	6.89-16.5	11.5	16.5-77.7	23.8	18.1-48.4	31.4	12.0-70.1	23.3	10.8-33.9	19.9
Mo	0.33-1.24	0.76	0.27-1.65	0.57	0.54-2.05	1.26	0.03-0.50	0.09	0.089-0.84	0.51	0.05-0.37	0.15
Na	60.4-99.0	77.8	76.7-354	214	40.0-88.2	53.7	42.5-176	125	31.0-837	82.1	64.3-861	314
Ni	0.51-1.93	0.77	0.49-3.10	1.55	1.45-1.67	1.51	0.89-3.78	3.32	0.64-3.09	1.45	0.85-3.06	1.84
P	1540-3995	1927	1041-1766	1418	2081-3275	2506	1906-2492	2225	1962-3305	2810	2833-4507	3198
Pb	0.56-0.96	0.70	0.32-1.83	0.65	0.40-0.98	0.65	0.86-1.69	1.24	0.59-0.97	0.68	0.45-0.83	0.76
Sr	2.02-9.39	4.16	25.1-33.1	30.9	15.0-92.8	51.3	10.8-40.1	25.0	6.88-20.5	14.2	19.2-22.4	21.3
V	0.03-0.45	0.091	2.04-4.11	2.91	0.10-0.57	0.32	1.27-3.65	1.93	0.15-0.55	0.32	0.49-1.27	0.95
Zn	18.6-29.3	23.3	15.0-31.8	23.7	12.9-36.2	15.4	12.4-167	20.9	39.7-66.5	56.8	26.2-32.3	28.6