Table 1.

Copper, Fe, and Mn concentrations in roots, stems, and leaves of Delaware Valley Azalea, common boxwood, and spreading cotoneaster grown under varying copper regimes.^{^Z}

Species	Nutrient Solution Cu Concentration (ppm)	Tissue Analyzed
		Root			Stem			Leaf
		Cu concn ppm	Fe concn ppm	Mn oncn PPm	Cu concn Ppm	Fe concn ppm	Mn concn ppm	Cu concn ppm	Fe concn ppm	Mn concn Ppm
Azalea	0.032	64	10168	171	14	127	27	7	103	18
	0.5	187	2594	54	17	97	18	8	142	17
	1.0^{^Y}	257	11021	173	40	88	18	11	178	16
	2.5^{^Y}	599	5754	125	45	42	12	20	150	20
	5.0^{^Y}	477	4565	125	80	57	25	21	132	21
	50.0^{^Y}	4819	8380	147	^X	^X	^X	35	224	27
	100.0^{^Y}	6046	4716	115	266 o	132	85	56	321	34
		r = .96^w	r = .18	r = .07	r = .98	r = .53	r = .97	r = .96	r = .95	r = .97
Boxwood	0.032	37	386	86	16	66	23	13	172	46
	0.5	115	274	105	23	73	19	14	185	37
	1.0	325	294	84	34	58	12	16	150	31
	2.5	569	286	95	37	43	.15	17	163	35
	5.0^{^Y}	673	251	97	61	64	8	23	139	19
	50.0^{^Y}	3657	368	26	320	59	9	49	160	31
	100.0^{^Y}	4368	466	18	296	69	12	65	174	40
		r =,96^w	r= .81	r = .92	r = .9	r = .24	r = .38	r = .98	r = .21	r = .17
Cotoneaster	0.032	63	898	6	11	56	1	12	186	29
	0.5	282	965	8	23	42	1	22	150	26
	1.0^{^Y}	641	1081	8	37	41	2	26	127	16
	2.5^{^Y}	1438	901	9	40	35	2	22	127	32
	5.0^{^Y}	2710	859	7	88	75	2	26	209	59
	50.0^{^Y}	7246	1141	9	130	64	11	47	132	102
	100.0^{^Y}	7460	1232	12	211	45	13	95	224	67
		r=,91^w	r = .84	r = .86	r = .95	r = .03	r ≈ .96,	r = .98	r = .45	r=.66

↵Z Data for azalea represent an average of 3 replications. Data for boxwood represent a composite of the 4 replications. Data for cotoneaster represent an average of the 4 replications at 2.5 ppm Cu treatment concentration and below, and a composite of the 4 replications at 5.0 ppm and above.
↵Y Plants in these treatment categories exhibited Cu toxicity symptoms.
↵X Samples destroyed in a lab accident.
x Coorelation of the nutrient solution Cu concn with the tissue-element concn.